A prospecting method for sandstone-type uranium deposits based on the boundaries of structural units

Abstract

The present application provides a prospecting method for sandstone-type uranium deposits based on the boundaries of tectonic units. The method includes: obtaining geological data of a sedimentary basin, determining the spatial distribution, tectonic and stratigraphic characteristics of tectonic units in the sedimentary basin, and determining the types of favorable ore-forming tectonic units according to the spatial distribution, tectonic and stratigraphic characteristics of the tectonic units; for different types of favorable ore-forming tectonic units, combining the gravity data and / or seismic data and / or oil and gas-bearing conditions of the favorable ore-forming tectonic units to determine the primary exploration target areas for sandstone-type uranium deposits. Based on the in-depth analysis of the uranium ore-forming characteristics controlled by the boundaries of tectonic units, the present application takes the uplifts and faults at the boundaries of tectonic units as important indicators for prospecting, and combines geological and geophysical prospecting methods to form a new, efficient and low-cost prospecting method, which can not only accurately lock in the preferred targets in the exploration areas for sandstone-type uranium deposits, but also significantly reduce the blindness in the prospecting process and improve the exploration efficiency.

Description

Technical Field

[0001] This application relates to the technical field of uranium ore geological exploration, and specifically relates to a prospecting method for sandstone-type uranium ore based on the boundaries of tectonic units. Background Art

[0002] Uranium resources are important strategic mineral resources. In the early stage, uranium resources were mainly obtained through the exploration of hard-rock type uranium ore. Such deposits are characterized by high grade and shallow burial, and radioactive exploration is the main exploration method. However, with the continuous progress of in-situ leaching technology, sandstone-type uranium ore has become the focus of current uranium ore resource exploration and research due to its low mining cost and environmental protection advantages. However, due to the insignificant physical property differences between the ore-bearing rocks and the surrounding rocks of sandstone-type uranium ore, and the relatively deep burial of the ore bodies, the traditional ground exploration methods (including radioactive exploration) have limited effects. Chinese Patent CN118330775A discloses a uranium ore delineation method and system under an extensional background, providing a uranium ore delineation method and system under an extensional background that combines multi-source geological data and gives priority to local exploration, providing a basis for local exploration, but unable to comprehensively analyze and delineate exploration target areas in the regional background. Therefore, sandstone-type uranium ore exploration is facing the dual challenges of "where to find" and "how to find". Summary of the Invention

[0003] Aiming at the problems existing in the prior art, this application provides a prospecting method for sandstone-type uranium ore based on the boundaries of tectonic units to solve the technical problem of the ineffective existing uranium ore prospecting methods. The method includes:

[0004] Obtain the geological data of the sedimentary basin, determine the spatial distribution, structure and stratigraphic characteristics of the tectonic units in the sedimentary basin, and determine the types of favorable ore-forming tectonic units according to the spatial distribution, structure and stratigraphic characteristics of the tectonic units;

[0005] For different types of favorable ore-forming tectonic units, combine the gravity data and / or seismic data and / or oil and gas occurrence of the favorable ore-forming tectonic units to determine the primary exploration target areas for sandstone-type uranium ore, and the primary exploration target areas include primary advantageous exploration target areas and / or primary good exploration target areas and / or primary potential exploration target areas.

[0006] Further, the step of obtaining the geological data of the sedimentary basin, determining the spatial distribution, structure and stratigraphic characteristics of the tectonic units in the sedimentary basin, and determining the types of favorable ore-forming tectonic units according to the spatial distribution, structure and stratigraphic characteristics of the tectonic units includes:

[0007] If tectonic unit B is adjacent to tectonic unit A where the bedrock is exposed, then determine that tectonic unit B is a dominant favorable ore-forming tectonic unit;

[0008] If the structural unit A is a large anticline, it is determined that the structural unit A and its adjacent structural unit B are good and favorable ore-forming structural units;

[0009] When the ore-prospecting target layers of the adjacent structural units A and B are both overlain by sedimentary layers, but there are differences in their basement depths, if the basement of the structural unit A with a smaller basement depth has a slope terrain, then both the structural unit A and the structural unit B are potential favorable ore-forming structural units; if the basement of the structural unit A with a smaller basement depth is uniform, then the structural unit B with a larger basement depth is a potential favorable ore-forming structural unit;

[0010] Among them, the boundary of the structural unit B close to the structural unit A is denoted as the first structural unit boundary, and the boundary of the structural unit B far from the structural unit A is denoted as the second structural unit boundary.

[0011] Furthermore, for different types of favorable ore-forming structural units, by combining the gravity data and / or seismic data and / or oil and gas-bearing conditions of the favorable ore-forming structural units, the primary exploration target areas for sandstone-type uranium deposits are determined. The primary exploration target areas include primary superior exploration target areas and / or primary good exploration target areas and / or primary potential exploration target areas, including:

[0012] If the favorable ore-forming structural unit is a superior favorable ore-forming structural unit, then:

[0013] Analyze the reduction intensity of the ore-prospecting target layer of the structural unit B to determine the type of the ore-prospecting target layer of the structural unit B;

[0014] Take the structural unit A as the erosion source area, and according to different types of ore-prospecting target layers, starting from the first structural unit boundary, divide the structural unit B into different types of ore-prospecting far-reaching areas;

[0015] Combining the gravity data and / or seismic data and / or oil and gas-bearing conditions of the ore-prospecting far-reaching areas, determine the type of the primary superior exploration target area.

[0016] Furthermore, the analysis of the reduction intensity of the ore-prospecting target layer of the structural unit B to determine the type of the ore-prospecting target layer of the structural unit B includes:

[0017] If the ore-prospecting target layer of the structural unit B is a coal-bearing formation or the ore-prospecting target layer was formed in a warm and humid paleoclimate environment, it is determined that the ore-prospecting target layer of the structural unit B is a type of ore-prospecting target layer with a reduction intensity;

[0018] If the ore-prospecting target layer of the structural unit B was formed in a paleoclimate environment of the transition from warm and humid to arid, it is determined that the ore-prospecting target layer of the structural unit B is a type of ore-prospecting target layer with a secondary reduction intensity;

[0019] If the ore-prospecting target layer of the structural unit B was formed in a hot and dry paleoclimate environment, it is determined that the ore-prospecting target layer of the structural unit B is a type of ore-prospecting target layer with a tertiary reduction intensity.

[0020] Furthermore, taking the structural unit A as the erosion source area, according to different types of ore-prospecting target horizons, starting from the boundary of the first structural unit, the structural unit B is divided into different types of ore-prospecting prospective areas, including:

[0021] If the ore-prospecting target horizon of the structural unit B is a type-I reduction intensity ore-prospecting target horizon, then the structural unit B within 30 km from the boundary of the first structural unit is divided into a-type ore-prospecting prospective areas;

[0022] If the ore-prospecting target horizon of the structural unit B is a type-II reduction intensity ore-prospecting target horizon, then the structural unit B within 30 - 100 km from the boundary of the first structural unit is divided into b-type ore-prospecting prospective areas;

[0023] If the ore-prospecting target horizon of the structural unit B is a type-III reduction intensity ore-prospecting target horizon, then the structural unit B within 100 - 250 km from the boundary of the first structural unit is divided into c-type ore-prospecting prospective areas.

[0024] Furthermore, combining the gravity data and / or seismic data and / or oil and gas occurrence conditions of the ore-prospecting prospective areas to determine the types of first-level dominant exploration target areas, including:

[0025] For a-type and b-type ore-prospecting prospective areas, process and invert the gravity data within the ore-prospecting prospective areas to obtain structural maps including the basement undulation morphology and the spatial distribution of faults and Bouguer gravity field contour maps, analyze the spatial distribution laws of different structures in the area, and determine the types of first-level dominant exploration target areas according to the spatial distribution laws of the different structures;

[0026] For c-type ore-prospecting prospective areas, along the flow direction of uranium- and oxygen-bearing water, search for the oil and gas occurrence conditions in the areas where the uranium- and oxygen-bearing water flows through, and determine the types of first-level dominant exploration target areas according to the oil and gas occurrence conditions in the areas where the uranium- and oxygen-bearing water flows through.

[0027] Furthermore, for a-type and b-type ore-prospecting prospective areas, process and invert the gravity data within the ore-prospecting prospective areas to obtain structural maps including the basement undulation morphology and the spatial distribution of faults and Bouguer gravity field contour maps, analyze the spatial distribution laws of different structures in the area, and determine the types of first-level dominant exploration target areas, including:

[0028] For a-type ore-prospecting prospective areas, process and invert the gravity data within the a-type ore-prospecting prospective areas to obtain structural maps including the basement undulation morphology and the spatial distribution of faults and Bouguer gravity field contour maps, and analyze the spatial distribution laws of uplifts and faults in the area;

[0029] If multiple uplifts and faults occur in clusters in Region 1, and the isopleths of the Bouguer gravity anomaly field in Region 1 show severe parallel distortion, then Region 1 is divided into Class a1 preferential exploration target areas;

[0030] If a single uplift and fault exist in Region 2, and the isopleths of the Bouguer gravity anomaly field in Region 2 show parallel distortion, then Region 2 is divided into Class a2 preferential exploration target areas;

[0031] For Class b prospecting prospective areas, process and invert the gravity data in the Class b prospecting prospective areas to obtain structural maps including the undulating shape of the basement and the spatial distribution of faults and the isopleth map of the Bouguer gravity field, and analyze the spatial distribution law of the depressions and faults in the area;

[0032] If there is a large depression with an area greater than 20 km 2 and the isopleths of the Bouguer gravity anomaly field at the edge of the large depression show severe parallel distortion, then the edge of the large depression is divided into Class b1 preferential exploration target areas;

[0033] If there is a medium-sized depression with an area greater than or equal to 5 km 2 and less than or equal to 20 km 2 and the isopleths of the Bouguer gravity anomaly field at the edge of the medium-sized depression show parallel distortion, then the edge of the medium-sized depression is divided into Class b2 preferential exploration target areas;

[0034] If there is a small depression with an area less than 5 km 2 and the isopleths of the Bouguer gravity anomaly field at the edge of the small depression show parallel distortion, then the edge of the small depression is divided into Class b3 preferential exploration target areas.

[0035] Furthermore, for Class c prospecting prospective areas, along the flow direction of uranium-bearing and oxygen-bearing water, search for the oil and gas situation in the area where the uranium-bearing and oxygen-bearing water flows through. According to the oil and gas situation in the area where the uranium-bearing and oxygen-bearing water flows through, determine the types of Class I preferential exploration target areas, including:

[0036] If there are oil and gas enrichment structural units in the area where the uranium-bearing and oxygen-bearing water flows through, then the non-oil and gas enrichment structural units in the Class c prospecting prospective areas are divided into Class c1 preferential exploration target areas, and the oil and gas enrichment structural units in the Class c prospecting prospective areas are divided into Class c2 preferential exploration target areas.

[0037] Furthermore, for different types of favorable ore-forming structural units, combine the gravity data and / or seismic data and / or oil and gas situation of the favorable ore-forming structural units to determine the Class I exploration target areas for sandstone-type uranium deposits. The Class I exploration target areas include Class I preferential exploration target areas and / or Class I good exploration target areas and / or Class I potential exploration target areas, and also include:

[0038] If the favorable ore-forming structural unit is a good favorable ore-forming structural unit, then:

[0039] Invert and reveal the development of faults and local uplifts in the good favorable ore-forming structural unit using seismic data and gravity data, and determine the type of the first-level good exploration target area according to the development of the faults and local uplifts.

[0040] Further, the step of inverting and revealing the development of faults and local uplifts in the good favorable ore-forming structural unit using seismic data and gravity data, and determining the type of the first-level good exploration target area according to the development of the faults and local uplifts includes:

[0041] If the fault and the local uplift are located between the long axis of the anticline and the boundary of the first structural unit and are close to the boundary of the first structural unit, it is determined that the good favorable ore-forming structural unit is a type-a good exploration target area;

[0042] If the fault and the local uplift are located between the long axis of the anticline and the boundary of the first structural unit and are close to the long axis of the anticline, it is determined that the good favorable ore-forming structural unit is a type-b good exploration target area;

[0043] If the fault and the local uplift are located in structural unit B and are close to the boundary of the first structural unit, it is determined that the good favorable ore-forming structural unit is a type-c good exploration target area.

[0044] Further, for different types of favorable ore-forming structural units, combining the gravity data and / or seismic data and / or oil and gas content of the favorable ore-forming structural unit, determine the first-level exploration target area for sandstone-type uranium ore. The first-level exploration target area includes the first-level dominant exploration target area and / or the first-level good exploration target area and / or the first-level potential exploration target area, and further includes:

[0045] If the favorable ore-forming structural unit is a potential favorable ore-forming structural unit, then:

[0046] Invert and reveal the development of the basement faults and local uplifts of structural unit B within 30 km of the boundary of the first structural unit and the development of the basement faults and local uplifts of the entire structural unit A using seismic data and gravity data. According to the development of the basement faults and local uplifts of structural unit B within 30 km of the boundary of the first structural unit and the development of the basement faults and local uplifts of the entire structural unit A, determine the type of the first-level potential exploration target area.

[0047] Furthermore, the basement faults and local uplifts of tectonic unit B within 30 km of the boundary of the first tectonic unit are inverted and revealed using seismic data and gravity data, as well as the basement faults and local uplifts of the entire tectonic unit A. Based on the basement faults and local uplifts of tectonic unit B within 30 km of the boundary of the first tectonic unit and the basement faults and local uplifts of the entire tectonic unit A, the types of primary potential exploration target areas are determined, including:

[0048] When the basement of tectonic unit A with a relatively shallow basement depth has a slope terrain and both tectonic unit A and tectonic unit B are potentially favorable ore-forming tectonic units:

[0049] If the basement faults and local uplifts are located in tectonic unit A and close to the boundary of the first tectonic unit, then the potentially favorable ore-forming tectonic unit is determined as a type-a potential exploration target area;

[0050] If the basement faults and local uplifts are located in tectonic unit B within 10 km of the boundary of the first tectonic unit, then the potentially favorable ore-forming tectonic unit is determined as a type-b potential exploration target area;

[0051] If the basement faults and local uplifts are located in tectonic unit B within 10 - 30 km of the boundary of the first tectonic unit, then the potentially favorable ore-forming tectonic unit is determined as a type-c potential exploration target area;

[0052] When the basement of tectonic unit A with a relatively shallow basement depth has a uniform basement depth and tectonic unit B with a relatively large basement depth is a potentially favorable ore-forming tectonic unit:

[0053] If the basement faults and local uplifts are located near both sides of the boundary of the first tectonic unit, then the potentially favorable ore-forming tectonic unit is determined as a type-d potential exploration target area.

[0054] Furthermore, it also includes:

[0055] Identifying whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the primary exploration target area based on seismic data, and determining the types of secondary exploration target areas according to the identification results.

[0056] Furthermore, the identification of whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the primary exploration target area based on seismic data, and determining the types of secondary exploration target areas according to the identification results, includes:

[0057] If there are sheet sand bodies in the ore-prospecting target layer within the primary exploration target area, then the primary exploration target area is determined as a secondary class-1 exploration target area;

[0058] If there are lenticular sand bodies in the ore-prospecting target layer within the primary exploration target area, then the primary exploration target area is determined as a secondary class-2 exploration target area.

[0059] Further, based on the seismic data, determine whether the protrusions in the secondary exploration target area cause folding of the ore - bearing target layer and whether the faults penetrate the ore - bearing target layer. According to the judgment results, determine the type of the tertiary exploration target area.

[0060] Further, based on the seismic data, determine whether the protrusions in the secondary exploration target area cause folding of the ore - bearing target layer and whether the faults penetrate the ore - bearing target layer. According to the judgment results, determine the type of the tertiary exploration target area, including:

[0061] If the protrusions in the secondary exploration target area cause folding of the ore - bearing target layer and the faults penetrate the ore - bearing target layer, then determine the secondary exploration target area as a tertiary - class 1 exploration target area;

[0062] If the protrusions in the secondary exploration target area do not cause folding of the ore - bearing target layer but the faults penetrate the ore - bearing target layer, or the protrusions cause folding of the strata but the faults do not penetrate the ore - bearing target layer, then determine the secondary exploration target area as a tertiary - class 2 exploration target area.

[0063] Based on the above - mentioned invention content, compared with the prior art, this application obtains the geological data of the sedimentary basin. According to the spatial distribution of tectonic units, tectonic and stratigraphic characteristics in the sedimentary basin, favorable ore - forming tectonic units are determined. For various ore - forming tectonic units, the uplifts and faults at the boundaries of the tectonic units are taken as important signs for prospecting. Combining geological and geophysical prospecting methods, analyze the spatial distribution laws of the uplifts (depressions, local protrusions) and faults at the boundaries of the tectonic units, and / or the characteristics of Bouguer gravity anomaly isograms in the area, and delineate the first - level superior exploration target area, the first - level good exploration target area, and the first - level potential exploration target area. It can not only accurately lock in the preferred targets for sandstone - type uranium ore exploration areas, but also significantly reduce the blindness in the prospecting process and improve the exploration efficiency. On this basis, further identify whether there are sheet - like sand bodies or lenticular sand bodies in the ore - bearing target layer in the first - level superior exploration target area according to the seismic data to determine the type of the second - level superior exploration target area; based on the seismic data, judge whether the protrusions in the second - level superior exploration target area cause folding of the ore - bearing target layer and whether the faults penetrate the ore - bearing target layer. According to the judgment results, determine the third - level superior exploration target area. Thus, it further accurately hits the sandstone - type uranium ore exploration target area and improves the prospecting accuracy and efficiency. In summary, based on the in - depth analysis of the uranium - forming characteristics controlled by the boundaries of tectonic units, this application takes the uplifts and faults at the boundaries of tectonic units as important signs for prospecting and combines geological and geophysical prospecting methods to form a new, efficient and low - cost prospecting method. This method can not only accurately lock in the preferred targets for sandstone - type uranium ore exploration areas, but also significantly reduce the blindness in the prospecting process and improve the exploration efficiency. Description of the Drawings

[0064] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for use in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0065] Figure 1 It is a schematic flow chart of a sandstone-type uranium ore prospecting method based on the boundaries of tectonic units provided by an embodiment of the present application;

[0066] Figure 2 It is a schematic diagram of advantageous ore-forming tectonic units and their boundaries provided by an embodiment of the present application;

[0067] Figure 3 It is a schematic diagram of good ore-forming tectonic units and their boundaries provided by an embodiment of the present application;

[0068] Figure 4 It is a schematic diagram of potential ore-forming tectonic units and their boundaries provided by an embodiment of the present application. Detailed implementation manners

[0069] To better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0070] It should be clear that the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Embodiment 1

[0071] Refer to Figure 1 , which is a schematic flow chart of a sandstone-type uranium ore prospecting method based on the boundaries of tectonic units provided by an embodiment of the present invention. As Figure 1 shown, the method specifically includes:

[0072] Step S1: Obtain the geological data of the sedimentary basin, determine the spatial distribution of tectonic units, tectonic and stratigraphic characteristics in the sedimentary basin, and determine the types of favorable ore-forming tectonic units according to the spatial distribution, tectonic and stratigraphic characteristics of the tectonic units.

[0073] In this embodiment, the types of favorable ore-forming tectonic units are determined according to the following method:

[0074] As Figure 2 shown, if tectonic unit B is adjacent to tectonic unit A where the bedrock is exposed, then tectonic unit B is determined to be a dominant favorable ore-forming tectonic unit.

[0075] As Figure 3As shown in the figure, if the structural unit A is a large anticline, it is determined that the structural unit A and its adjacent structural unit B are good and favorable ore-forming structural units.

[0076] As Figure 4 shown, the ore-prospecting target layers of the adjacent structural units A and B are both overlain by sedimentary layers, but there are differences in the basement depths of the structural units A and B. At this time, as Figure 4 shown in (a) of Figure 4 , if the basement of the structural unit A with a smaller basement depth is a slope terrain, then both the structural unit A and the structural unit B are potential favorable ore-forming structural units; as Figure 4 shown in (b) of Figure 4 , if the basement depth of the structural unit A with a smaller basement depth is uniform, then the structural unit B with a larger basement depth is a potential favorable ore-forming structural unit.

[0077] Potential favorable ore-forming structural units may lack sufficient uranium source supply, and their ore-forming potential is lower than that of the structural units in the adjacent bedrock outcrop area and anticline structural units.

[0078] Step S2: For different types of favorable ore-forming structural units, combine the gravity data and / or seismic data and / or oil and gas occurrence conditions of the favorable ore-forming structural units to determine the primary exploration target areas for sandstone-type uranium deposits, and the primary exploration target areas include primary dominant exploration target areas and / or primary good exploration target areas and / or primary potential exploration target areas. Example Two

[0079] In this example, if the favorable ore-forming structural unit is a dominant favorable ore-forming structural unit, then:

[0080] Analyze the reduction intensity of the ore-prospecting target layer of the structural unit B to determine the type of the ore-prospecting target layer of the structural unit B.

[0081] First, collect relevant geological data of the study area and comprehensively analyze the paleoclimate environment and its evolution during the formation period of the ore-prospecting target layer and its adjacent horizons. Then, according to the paleoclimate environment and its evolution during the formation period of the ore-prospecting target layer and its adjacent horizons, determine the type of the ore-prospecting target layer, specifically including:

[0082] If the ore-prospecting target layer of the structural unit B is a coal-bearing formation or the ore-prospecting target layer was formed in a warm and humid paleoclimate environment, it is determined that the ore-prospecting target layer of the structural unit B is a type I reduction intensity ore-prospecting target layer;

[0083] If the ore-prospecting target layer of the structural unit B was formed in a paleoclimate environment of the transition from warm and humid to arid, it is determined that the ore-prospecting target layer of the structural unit B is a type II reduction intensity ore-prospecting target layer;

[0084] If the ore-prospecting target layer of the structural unit B was formed in a hot and dry paleoclimate environment, it is determined that the ore-prospecting target layer of the structural unit B is a type III reduction intensity ore-prospecting target layer.

[0085] Taking the tectonic unit A as the erosion source area, according to different types of ore-prospecting target horizons, starting from the boundary of the first tectonic unit, the tectonic unit B is divided into different types of ore-prospecting far-reaching areas.

[0086] In this embodiment, if the ore-prospecting target horizon of the tectonic unit B is a type-I reduction intensity ore-prospecting target horizon, then the tectonic unit B within a range of less than or equal to 30 km from the boundary of the first tectonic unit is divided into a type-a ore-prospecting far-reaching area;

[0087] If the ore-prospecting target horizon of the tectonic unit B is a type-II reduction intensity ore-prospecting target horizon, then the tectonic unit B within a range of 30 - 100 km from the boundary of the first tectonic unit is divided into a type-b ore-prospecting far-reaching area; where the range of 30 - 100 km is a range greater than 30 km and less than or equal to 100 km;

[0088] If the ore-prospecting target horizon of the tectonic unit B is a type-III reduction intensity ore-prospecting target horizon, then the tectonic unit B within a range of 100 - 250 km from the boundary of the first tectonic unit is divided into a type-c ore-prospecting far-reaching area. Where the range of 100 - 250 km is a range greater than 100 km and less than or equal to 250 km.

[0089] Combining the gravity data and / or seismic data and / or oil and gas content of the ore-prospecting far-reaching area, determine the type of primary advantageous exploration target area.

[0090] In this embodiment, for type-a and type-b ore-prospecting far-reaching areas, process and invert the gravity data within the ore-prospecting far-reaching area to obtain a structural map including the basement undulation form and the spatial distribution of faults and a Bouguer gravity field contour map, analyze the spatial distribution law of different structures within the area, and determine the type of primary advantageous exploration target area according to the spatial distribution law of the different structures.

[0091] For type-c ore-prospecting far-reaching areas, along the flow direction of uranium- and oxygen-bearing water, search for the oil and gas content in the area where the uranium- and oxygen-bearing water flows through, and determine the type of primary advantageous exploration target area according to the oil and gas content in the area where the uranium- and oxygen-bearing water flows through.

[0092] Specifically, for type-a ore-prospecting far-reaching areas, process and invert the gravity data within the type-a ore-prospecting far-reaching area to obtain a structural map including the basement undulation form and the spatial distribution of faults and a Bouguer gravity field contour map, and analyze the spatial distribution law of uplifts and faults within the area;

[0093] If multiple uplifts and faults appear in clusters in area I, and the contour lines of the Bouguer gravity anomaly field in area I show severe parallel distortion, then area I is divided into a type-a1 advantageous exploration target area;

[0094] If there is a single uplift and fracture in Region 2, and the isopleths of the Bouguer gravity anomaly field in Region 2 show distortion in the same row, then Region 2 is divided into Class a2 preferred exploration target areas;

[0095] For Class b prospective ore areas, process and invert the gravity data in Class b prospective ore areas to obtain structural maps including the undulating shape of the basement and the spatial distribution of fractures and isopleth maps of the Bouguer gravity field, and analyze the spatial distribution law of depressions and fractures in the area;

[0096] If there is a large depression with an area greater than 20 km 2 and the isopleths of the Bouguer gravity anomaly field at the edge of the large depression show severe distortion in the same row, then the edge of the large depression is divided into Class b1 preferred exploration target areas;

[0097] If there is a medium-sized depression with an area greater than or equal to 5 km 2 and less than or equal to 20 km 2 and the isopleths of the Bouguer gravity anomaly field at the edge of the medium-sized depression show distortion in the same row, then the edge of the medium-sized depression is divided into Class b2 preferred exploration target areas;

[0098] If there is a small depression with an area less than 5 km 2 and the isopleths of the Bouguer gravity anomaly field at the edge of the small depression show distortion in the same row, then the edge of the small depression is divided into Class b3 preferred exploration target areas.

[0099] For Class c prospective ore areas, along the flow direction of uranium-bearing and oxygen-bearing water, search for the oil and gas content in the area where the uranium-bearing and oxygen-bearing water flows through. According to the oil and gas content in the area where the uranium-bearing and oxygen-bearing water flows through, determine the type of Class I preferred exploration target areas. Because Class c prospective ore areas are far from the erosion source area, and these structural units far from the erosion source area are closer to the oil and gas enrichment structural units. Since the organic matter content of the ore target layer in Class c prospective ore areas is low by itself, deep oil and gas are needed as supplementary organic matter. However, moderate oil and gas escape is beneficial to uranium mineralization, while excessive oil and gas escape in the oil and gas area is not conducive to uranium mineralization.

[0100] Therefore, if there are oil and gas enrichment structural units in the area where the uranium-bearing and oxygen-bearing water flows through, then the non-oil and gas enrichment structural units in Class c prospective ore areas are divided into Class c1 preferred exploration target areas, and the oil and gas enrichment structural units in Class c prospective ore areas are divided into Class c2 preferred exploration target areas.

[0101] In this embodiment, according to the seismic data, identify whether there are sheet sand bodies or lenticular sand bodies in the ore target layer in the Class I exploration target area. According to the identification result, determine the type of Class II exploration target area.

[0102] Specifically, it includes: identifying whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the first-level dominant exploration target area based on seismic data, and determining the type of the second-level dominant exploration target area according to the identification result.

[0103] Tectonic unit A is the source area, and uranium-bearing and oxygen-bearing fluids infiltrate into tectonic unit B. If the sand content in the ore-prospecting target layer around the boundary of the tectonic unit is relatively high, it is conducive to the continuous infiltration of surface uranium-bearing and oxygen-bearing water, which is beneficial to uranium mineralization. Therefore, it is possible to identify whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the first-level dominant exploration target area based on seismic data, and further determine the type of the second-level dominant exploration target area according to the identification result.

[0104] In the seismic profile, there are obvious differences in the responses of reflection event axes to sandstone and mudstone. Among them, mudstone usually shows strong amplitude, high frequency, and good continuity reflection event axes in the seismic profile, while sandstone, on the contrary, usually shows weak amplitude and relatively high-frequency reflection event axes.

[0105] By comparing the reflection characteristics of the ore-bearing layer in the seismic profile, the reflection event axes with weak amplitude and relatively high frequency are defined as sand bodies. Sand bodies with a long axis greater than 1 km are called sheet sand bodies, and sand bodies with a long axis less than 1 km are called lenticular sand bodies.

[0106] Specifically, the type of the second-level dominant exploration target area is further determined according to the following method:

[0107] If there are sheet sand bodies in the ore-prospecting target layer within the first-level dominant exploration target area, then the first-level dominant exploration target area is determined as the second-level 1-type dominant exploration target area;

[0108] If there are lenticular sand bodies in the ore-prospecting target layer within the first-level dominant exploration target area, then the first-level dominant exploration target area is determined as the second-level 2-type dominant exploration target area.

[0109] For example, for the previously determined first-level dominant exploration target areas: a1-type dominant exploration target area, a2-type dominant exploration target area, b1-type dominant exploration target area, b2-type dominant exploration target area, b3-type dominant exploration target area, c1-type dominant exploration target area, c2-type dominant exploration target area, the following second-level dominant exploration target areas can be determined using the above method:

[0110] If there are sheet sand bodies in the ore-prospecting target layer of the a1-type dominant exploration target area, then the a1-type dominant exploration target area is further determined as the a11-type dominant exploration target area;

[0111] If there are lenticular sand bodies in the ore-prospecting target layer of the a1-type dominant exploration target area, then the a1-type dominant exploration target area is further determined as the a12-type dominant exploration target area;

[0112] If there is a sheet sand body in the ore-prospecting target horizon of the Class A2 advantageous exploration target area, then further determine the Class A2 advantageous exploration target area as the Class A21 advantageous exploration target area;

[0113] If there is a lenticular sand body in the ore-prospecting target horizon of the Class A2 advantageous exploration target area, then further determine the Class A2 advantageous exploration target area as the Class A22 advantageous exploration target area;

[0114] If there is a sheet sand body in the ore-prospecting target horizon of the Class B1 advantageous exploration target area, then further determine the Class B1 advantageous exploration target area as the Class B11 advantageous exploration target area;

[0115] If there is a lenticular sand body in the ore-prospecting target horizon of the Class B1 advantageous exploration target area, then further determine the Class B1 advantageous exploration target area as the Class B12 advantageous exploration target area;

[0116] If there is a sheet sand body in the ore-prospecting target horizon of the Class B2 advantageous exploration target area, then further determine the Class B2 advantageous exploration target area as the Class B21 advantageous exploration target area;

[0117] If there is a lenticular sand body in the ore-prospecting target horizon of the Class B2 advantageous exploration target area, then further determine the Class B2 advantageous exploration target area as the Class B22 advantageous exploration target area;

[0118] If there is a sheet sand body in the ore-prospecting target horizon of the Class B3 advantageous exploration target area, then further determine the Class B3 advantageous exploration target area as the Class B31 advantageous exploration target area;

[0119] If there is a lenticular sand body in the ore-prospecting target horizon of the Class B3 advantageous exploration target area, then further determine the Class B3 advantageous exploration target area as the Class B32 advantageous exploration target area;

[0120] If there is a sheet sand body in the ore-prospecting target horizon of the Class C1 advantageous exploration target area, then further determine the Class C1 advantageous exploration target area as the Class C11 advantageous exploration target area;

[0121] If there is a lenticular sand body in the ore-prospecting target horizon of the Class C1 advantageous exploration target area, then further determine the Class C1 advantageous exploration target area as the Class C12 advantageous exploration target area;

[0122] If there is a sheet sand body in the ore-prospecting target horizon of the Class C2 advantageous exploration target area, then further determine the Class C2 advantageous exploration target area as the Class C21 advantageous exploration target area;

[0123] If there is a lenticular sand body in the ore-prospecting target horizon of the Class C2 advantageous exploration target area, then further determine the Class C2 advantageous exploration target area as the Class C22 advantageous exploration target area.

[0124] In this embodiment, determine whether the bulge in the secondary exploration target area causes folding of the ore-prospecting target horizon and whether the fault penetrates the ore-prospecting target horizon according to the seismic data, and determine the type of the tertiary exploration target area according to the judgment result.

[0125] Specifically, it includes: judging whether the bulge in the secondary superior exploration target area causes folding of the ore-prospecting target layer and whether the fault penetrates into the ore-prospecting target layer according to seismic data, and determining the tertiary superior exploration target area according to the judgment results.

[0126] The folded part of the ore-prospecting target layer can guide the flow of uranium-bearing and oxygen-bearing fluids, which is beneficial to uranium mineralization; the fault penetrating into the ore-bearing layer can communicate with deep oil and gas, providing organic matter for uranium mineralization, which is beneficial to uranium mineralization. Therefore, seismic data can be used to judge whether the bulge causes folding of the ore-prospecting target layer and whether the fault penetrates into the ore-prospecting target layer, so as to further divide the types of exploration target areas.

[0127] Specifically, the types of tertiary superior exploration target areas are further determined according to the following method:

[0128] If the bulge in the secondary superior exploration target area causes folding of the ore-prospecting target layer and the fault penetrates into the ore-prospecting target layer, then the secondary superior exploration target area is determined as a tertiary class 1 superior exploration target area;

[0129] If the bulge in the secondary superior exploration target area does not cause folding of the ore-prospecting target layer but the fault penetrates into the ore-prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate into the ore-prospecting target layer, then the secondary superior exploration target area is determined as a tertiary class 2 superior exploration target area.

[0130] For example, for the previously determined secondary superior exploration target area, the following tertiary superior exploration target areas can be determined using the above method:

[0131] If the bulge in the a11 type superior exploration target area causes folding of the ore-prospecting target layer and the fault penetrates into the ore-prospecting target layer, then the a11 type superior exploration target area is further determined as an a111 type superior exploration target area;

[0132] If the bulge in the a11 type superior exploration target area does not cause folding of the ore-prospecting target layer but the fault penetrates into the ore-prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate into the ore-prospecting target layer, then the a11 type superior exploration target area is further determined as an a112 type superior exploration target area;

[0133] If the bulge in the a12 type superior exploration target area causes folding of the ore-prospecting target layer and the fault penetrates into the ore-prospecting target layer, then the a12 type superior exploration target area is further determined as an a121 type superior exploration target area;

[0134] If the bulge in the a12 type superior exploration target area does not cause folding of the ore-prospecting target layer but the fault penetrates into the ore-prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate into the ore-prospecting target layer, then the a12 type superior exploration target area is further determined as an a122 type superior exploration target area;

[0135] If the bulge of the Class a21 preferential exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates into the ore-prospecting target horizon, then the Class a21 preferential exploration target area is further determined as the Class a211 preferential exploration target area;

[0136] If the bulge of the Class a21 preferential exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates into the ore-prospecting target horizon, or the bulge causes the folding of the strata but the fault does not penetrate into the ore-prospecting target horizon, then the Class a21 preferential exploration target area is further determined as the Class a212 preferential exploration target area;

[0137] If the bulge of the Class a22 preferential exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates into the ore-prospecting target horizon, then the Class a22 preferential exploration target area is further determined as the Class a221 preferential exploration target area;

[0138] If the bulge of the Class a22 preferential exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates into the ore-prospecting target horizon, or the bulge causes the folding of the strata but the fault does not penetrate into the ore-prospecting target horizon, then the Class a22 preferential exploration target area is further determined as the Class a222 preferential exploration target area;

[0139] If the bulge of the Class b11 preferential exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates into the ore-prospecting target horizon, then the Class b11 preferential exploration target area is further determined as the Class b111 preferential exploration target area;

[0140] If the bulge of the Class b11 preferential exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates into the ore-prospecting target horizon, or the bulge causes the folding of the strata but the fault does not penetrate into the ore-prospecting target horizon, then the Class b11 preferential exploration target area is further determined as the Class b112 preferential exploration target area;

[0141] If the bulge of the Class b12 preferential exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates into the ore-prospecting target horizon, then the Class b12 preferential exploration target area is further determined as the Class b121 preferential exploration target area;

[0142] If the bulge of the Class b12 preferential exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates into the ore-prospecting target horizon, or the bulge causes the folding of the strata but the fault does not penetrate into the ore-prospecting target horizon, then the Class b12 preferential exploration target area is further determined as the Class b122 preferential exploration target area;

[0143] If the bulge of the Class b21 preferential exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates into the ore-prospecting target horizon, then the Class b21 preferential exploration target area is further determined as the Class b211 preferential exploration target area;

[0144] If the bulge of the Class b21 preferential exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates into the ore-prospecting target horizon, or the bulge causes the folding of the strata but the fault does not penetrate into the ore-prospecting target horizon, then the Class b21 preferential exploration target area is further determined as the Class b212 preferential exploration target area;

[0145] If the protrusion of the Class b22 dominant exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates the ore-prospecting target horizon, then the Class b22 dominant exploration target area is further determined as the Class b221 dominant exploration target area;

[0146] If the protrusion of the Class b22 dominant exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates the ore-prospecting target horizon, or the protrusion causes the folding of the strata but the fault does not penetrate the ore-prospecting target horizon, then the Class b22 dominant exploration target area is further determined as the Class b222 dominant exploration target area;

[0147] If the protrusion of the Class b31 dominant exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates the ore-prospecting target horizon, then the Class b31 dominant exploration target area is further determined as the Class b311 dominant exploration target area;

[0148] If the protrusion of the Class b31 dominant exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates the ore-prospecting target horizon, or the protrusion causes the folding of the strata but the fault does not penetrate the ore-prospecting target horizon, then the Class b31 dominant exploration target area is further determined as the Class b312 dominant exploration target area;

[0149] If the protrusion of the Class b32 dominant exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates the ore-prospecting target horizon, then the Class b32 dominant exploration target area is further determined as the Class b321 dominant exploration target area;

[0150] If the protrusion of the Class b32 dominant exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates the ore-prospecting target horizon, or the protrusion causes the folding of the strata but the fault does not penetrate the ore-prospecting target horizon, then the Class b32 dominant exploration target area is further determined as the Class b322 dominant exploration target area;

[0151] If the protrusion of the Class c11 dominant exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates the ore-prospecting target horizon, then the Class c11 dominant exploration target area is further determined as the Class c111 dominant exploration target area;

[0152] If the protrusion of the Class c11 dominant exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates the ore-prospecting target horizon, or the protrusion causes the folding of the strata but the fault does not penetrate the ore-prospecting target horizon, then the Class c11 dominant exploration target area is further determined as the Class c112 dominant exploration target area;

[0153] If the protrusion of the Class c12 dominant exploration target area causes the folding of the ore-prospecting target horizon and the fault penetrates the ore-prospecting target horizon, then the Class c12 dominant exploration target area is further determined as the Class c121 dominant exploration target area;

[0154] If the protrusion of the Class c12 dominant exploration target area does not cause the folding of the ore-prospecting target horizon but the fault penetrates the ore-prospecting target horizon, or the protrusion causes the folding of the strata but the fault does not penetrate the ore-prospecting target horizon, then the Class c12 dominant exploration target area is further determined as the Class c122 dominant exploration target area;

[0155] If the protrusion in the Class C21 advantageous exploration target area causes the folding of the ore-prospecting target layer and the fault penetrates the ore-prospecting target layer, then the Class C21 advantageous exploration target area is further determined as the Class C211 advantageous exploration target area;

[0156] If the protrusion in the Class C21 advantageous exploration target area does not cause the folding of the ore-prospecting target layer but the fault penetrates the ore-prospecting target layer, or the protrusion causes the folding of the strata but the fault does not penetrate the ore-prospecting target layer, then the Class C21 advantageous exploration target area is further determined as the Class C212 advantageous exploration target area;

[0157] If the protrusion in the Class C22 advantageous exploration target area causes the folding of the ore-prospecting target layer and the fault penetrates the ore-prospecting target layer, then the Class C22 advantageous exploration target area is determined as the Class C221 advantageous exploration target area;

[0158] If the protrusion in the Class C22 advantageous exploration target area does not cause the folding of the ore-prospecting target layer but the fault penetrates the ore-prospecting target layer, or the protrusion causes the folding of the strata but the fault does not penetrate the ore-prospecting target layer, then the Class C22 advantageous exploration target area is determined as the Class C222 advantageous exploration target area. Embodiment III

[0159] In this embodiment, if the favorable ore-forming structural unit is a good favorable ore-forming structural unit, then:

[0160] Use seismic data and gravity data to invert and reveal the development of faults and local protrusions in the good favorable ore-forming structural unit, and determine the type of the first-level good exploration target area according to the development of the faults and local protrusions.

[0161] Specifically, if the fault and the local protrusion are located between the long axis of the anticline and the boundary of the first structural unit and are close to the boundary of the first structural unit, then the good favorable ore-forming structural unit is determined as the Class A good exploration target area;

[0162] If the fault and the local protrusion are located between the long axis of the anticline and the boundary of the first structural unit and are close to the long axis of the anticline, then the good favorable ore-forming structural unit is determined as the Class B good exploration target area;

[0163] If the fault and the local protrusion are located in Structural Unit B and are close to the boundary of the first structural unit, then the good favorable ore-forming structural unit is determined as the Class C good exploration target area.

[0164] In one embodiment, according to the seismic data, identify whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the first-level exploration target area, and determine the type of the second-level exploration target area according to the identification result.

[0165] Specifically, according to the seismic data, identify whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the first-level good exploration target area, and determine the type of the second-level good exploration target area according to the identification result.

[0166] The structural unit A is a large anticline, and uranium-bearing and oxygen-bearing fluids infiltrate into the formation through the core of the anticline. If the sandy content of the ore-prospecting target layer in the core and its periphery of the anticline is relatively high, it is conducive to the continuous infiltration of uranium-bearing and oxygen-bearing surface water, which is beneficial to uranium mineralization. Therefore, it is possible to identify whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the first-class good exploration target area based on seismic data, and further determine the type of the second-class good exploration target area according to the identification results.

[0167] Specifically, the type of the second-class good exploration target area is further determined according to the following method:

[0168] If there are sheet sand bodies in the ore-prospecting target layer within the first-class good exploration target area, then the first-class good exploration target area is determined as a second-class type 1 good exploration target area;

[0169] If there are lenticular sand bodies in the ore-prospecting target layer within the first-class good exploration target area, then the first-class good exploration target area is determined as a second-class type 2 good exploration target area.

[0170] For example, for the first-class good exploration target areas determined previously: a-class good exploration target area, b-class good exploration target area, c-class good exploration target area, the following second-class good exploration target areas can be determined by using the above method:

[0171] If there are sheet sand bodies in the ore-prospecting target layer of the a-class good exploration target area, then the a-class good exploration target area is further determined as an a1-class good exploration target area;

[0172] If there are lenticular sand bodies in the ore-prospecting target layer of the a-class good exploration target area, then the a-class good exploration target area is further determined as an a2-class good exploration target area;

[0173] If there are sheet sand bodies in the ore-prospecting target layer of the b-class good exploration target area, then the b-class good exploration target area is further determined as a b1-class good exploration target area;

[0174] If there are lenticular sand bodies in the ore-prospecting target layer of the b-class good exploration target area, then the b-class good exploration target area is further determined as a b2-class good exploration target area;

[0175] If there are sheet sand bodies in the ore-prospecting target layer of the c-class good exploration target area, then the c-class good exploration target area is further determined as a c1-class good exploration target area.

[0176] If there are lenticular sand bodies in the ore-prospecting target layer of the c-class good exploration target area, then the c-class good exploration target area is further determined as a c2-class good exploration target area.

[0177] In one embodiment, it is determined whether the protrusion in the secondary exploration target area causes folding of the ore-prospecting target layer and whether the fault penetrates into the ore-prospecting target layer according to seismic data, and the type of the tertiary exploration target area is determined according to the determination result.

[0178] Specifically, it includes: determining whether the protrusion in the secondary good exploration target area causes folding of the ore-prospecting target layer and whether the fault penetrates into the ore-prospecting target layer according to seismic data, and determining the tertiary good exploration target area according to the determination result.

[0179] Specifically, the type of the tertiary good exploration target area is further determined according to the following method:

[0180] If the protrusion in the secondary good exploration target area causes folding of the ore-prospecting target layer and the fault penetrates into the ore-prospecting target layer, then the secondary good exploration target area is determined as a tertiary class 1 good exploration target area;

[0181] If the protrusion in the secondary good exploration target area does not cause folding of the ore-prospecting target layer but the fault penetrates into the ore-prospecting target layer, or the protrusion causes folding of the formation but the fault does not penetrate into the ore-prospecting target layer, then the secondary good exploration target area is determined as a tertiary class 2 good exploration target area.

[0182] For example, for the secondary good exploration target area determined previously, the following tertiary good exploration target areas can be determined by using the above method:

[0183] If the protrusion of the a1 type good exploration target area causes folding of the ore-prospecting target layer and the fault penetrates into the ore-prospecting target layer, then the a1 type good exploration target area is further determined as an a11 type good exploration target area;

[0184] If the protrusion of the a1 type good exploration target area does not cause folding of the ore-prospecting target layer but the fault penetrates into the ore-prospecting target layer, or the protrusion causes folding of the formation but the fault does not penetrate into the ore-prospecting target layer, then the a1 type good exploration target area is further determined as an a12 type good exploration target area;

[0185] If the protrusion of the a2 type good exploration target area causes folding of the ore-prospecting target layer and the fault penetrates into the ore-prospecting target layer, then the a2 type good exploration target area is further determined as an a21 type good exploration target area;

[0186] If the protrusion of the a2 type good exploration target area does not cause folding of the ore-prospecting target layer but the fault penetrates into the ore-prospecting target layer, or the protrusion causes folding of the formation but the fault does not penetrate into the ore-prospecting target layer, then the a2 type good exploration target area is further determined as an a22 type good exploration target area;

[0187] If the protrusion of the b1 type good exploration target area causes folding of the ore-prospecting target layer and the fault penetrates into the ore-prospecting target layer, then the b1 type good exploration target area is further determined as a b11 type good exploration target area;

[0188] If the bulge in the Class B1 favorable exploration target area does not cause folding of the ore-prospecting target horizon but the fault penetrates the ore-prospecting target horizon, or the bulge causes folding of the strata but the fault does not penetrate the ore-prospecting target horizon, then the Class B1 favorable exploration target area is further determined as a Class B12 favorable exploration target area;

[0189] If the bulge in the Class B2 favorable exploration target area causes folding of the ore-prospecting target horizon and the fault penetrates the ore-prospecting target horizon, then the Class B2 favorable exploration target area is further determined as a Class B21 favorable exploration target area;

[0190] If the bulge in the Class B2 favorable exploration target area does not cause folding of the ore-prospecting target horizon but the fault penetrates the ore-prospecting target horizon, or the bulge causes folding of the strata but the fault does not penetrate the ore-prospecting target horizon, then the Class B2 favorable exploration target area is further determined as a Class B22 favorable exploration target area;

[0191] If the bulge in the Class C1 favorable exploration target area causes folding of the ore-prospecting target horizon and the fault penetrates the ore-prospecting target horizon, then the Class C1 favorable exploration target area is further determined as a Class C11 favorable exploration target area;

[0192] If the bulge in the Class C1 favorable exploration target area does not cause folding of the ore-prospecting target horizon but the fault penetrates the ore-prospecting target horizon, or the bulge causes folding of the strata but the fault does not penetrate the ore-prospecting target horizon, then the Class C1 favorable exploration target area is further determined as a Class C12 favorable exploration target area;

[0193] If the bulge in the Class C2 favorable exploration target area causes folding of the ore-prospecting target horizon and the fault penetrates the ore-prospecting target horizon, then the Class C2 favorable exploration target area is further determined as a Class C21 favorable exploration target area;

[0194] If the bulge in the Class C2 favorable exploration target area does not cause folding of the ore-prospecting target horizon but the fault penetrates the ore-prospecting target horizon, or the bulge causes folding of the strata but the fault does not penetrate the ore-prospecting target horizon, then the Class C2 favorable exploration target area is further determined as a Class C22 favorable exploration target area. Example 4

[0195] In this example, if the favorable metallogenic structural unit is a potential favorable metallogenic structural unit, then:

[0196] Using seismic data and gravity data to invert and reveal the development of the basement faults and local bulges of structural unit B within a range of less than or equal to 30 km from the boundary of the first structural unit, as well as the development of the basement faults and local bulges of the entire structural unit A, and determining the type of primary potential exploration target area based on the development of the basement faults and local bulges of structural unit B within a range of less than or equal to 30 km from the boundary of the first structural unit and the development of the basement faults and local bulges of the entire structural unit A.

[0197] Specifically, when the base of the structural unit A with a relatively small buried depth of the base is a slope terrain, and both the structural unit A and the structural unit B are potentially favorable ore-forming structural units:

[0198] If the base fracture and local uplift are located in the structural unit A and close to the boundary of the first structural unit, it is determined that the potentially favorable ore-forming structural unit is a type-a potential exploration target area;

[0199] If the base fracture and local uplift are located in the structural unit B within a range less than or equal to 10 km from the boundary of the first structural unit, it is determined that the potentially favorable ore-forming structural unit is a type-b potential exploration target area;

[0200] If the base fracture and local uplift are located in the structural unit B within a range of 10 - 30 km from the boundary of the first structural unit, it is determined that the potentially favorable ore-forming structural unit is a type-c potential exploration target area; where the range of 10 - 30 km is a range greater than 10 km and less than or equal to 30 km.

[0201] When the base of the structural unit A with a relatively small buried depth of the base is uniform, and the structural unit B with a relatively large buried depth of the base is a potentially favorable ore-forming structural unit:

[0202] If the base fracture and local uplift are located near both sides of the boundary of the first structural unit, it is determined that the potentially favorable ore-forming structural unit is a type-d potential exploration target area.

[0203] In one embodiment, it is identified whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the first-level exploration target area according to seismic data, and according to the identification result, the type of the second-level exploration target area is determined.

[0204] Specifically, it includes: identifying whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the first-level potential exploration target area according to seismic data, and according to the identification result, the type of the second-level potential exploration target area is determined.

[0205] For potentially favorable ore-forming structural units, as Figure 4 shown, the structural unit A is a slope terrain, and the uranium-bearing and oxygen-bearing fluid migrates along the slope terrain to the low-lying area. Similarly, if the sand content of the ore-prospecting target layer in the structural unit A and its surrounding area is relatively high, it is beneficial to the continuous infiltration of surface uranium-bearing and oxygen-bearing water, which is favorable for uranium mineralization. Therefore, it can be identified whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the first-level potential exploration target area according to seismic data, and according to the identification result, the type of the second-level potential exploration target area is further determined.

[0206] Specifically, the type of the second-level potential exploration target area is further determined according to the following method:

[0207] If there is a sheet sand body in the ore-prospecting target horizon within the first-level potential exploration target area, then determine the first-level potential exploration target area as a second-level Class 1 potential exploration target area;

[0208] If there is a lenticular sand body in the ore-prospecting target horizon within the first-level potential exploration target area, then determine the first-level potential exploration target area as a second-level Class 2 potential exploration target area.

[0209] For example, for the first-level potential exploration target areas that have been determined previously: a-type potential exploration target area, b-type potential exploration target area, c-type potential exploration target area, d-type potential exploration target area, the following second-level potential exploration target areas can be determined using the above method:

[0210] If there is a sheet sand body in the ore-prospecting target horizon of the a-type potential exploration target area, then further determine the a-type potential exploration target area as an a1-type potential exploration target area;

[0211] If there is a lenticular sand body in the ore-prospecting target horizon of the a-type potential exploration target area, then further determine the a-type potential exploration target area as an a2-type potential exploration target area;

[0212] If there is a sheet sand body in the ore-prospecting target horizon of the b-type potential exploration target area, then further determine the b-type potential exploration target area as a b1-type potential exploration target area;

[0213] If there is a lenticular sand body in the ore-prospecting target horizon of the b-type potential exploration target area, then further determine the b-type potential exploration target area as a b2-type potential exploration target area;

[0214] If there is a sheet sand body in the ore-prospecting target horizon of the c-type potential exploration target area, then further determine the c-type potential exploration target area as a c1-type potential exploration target area;

[0215] If there is a lenticular sand body in the ore-prospecting target horizon of the c-type potential exploration target area, then further determine the c-type potential exploration target area as a c2-type potential exploration target area;

[0216] If there is a sheet sand body in the ore-prospecting target horizon of the d-type potential exploration target area, then further determine the d-type potential exploration target area as a d1-type potential exploration target area;

[0217] If there is a lenticular sand body in the ore-prospecting target horizon of the d-type potential exploration target area, then further determine the d-type potential exploration target area as a d2-type potential exploration target area.

[0218] In one embodiment, determine whether the bulge within the second-level exploration target area causes folding of the ore-prospecting target horizon and whether the fault penetrates the ore-prospecting target horizon based on seismic data, and determine the third-level exploration target area type according to the judgment result.

[0219] Specifically, it includes: judging whether the bulge in the secondary potential exploration target area causes folding of the ore - prospecting target layer and whether the fault penetrates into the ore - prospecting target layer according to seismic data, and determining the tertiary potential exploration target area based on the judgment result.

[0220] Specifically, the type of the tertiary potential exploration target area is further determined according to the following method:

[0221] If the bulge in the secondary potential exploration target area causes folding of the ore - prospecting target layer and the fault penetrates into the ore - prospecting target layer, then the secondary potential exploration target area is determined as a tertiary class 1 potential exploration target area;

[0222] If the bulge in the secondary potential exploration target area does not cause folding of the ore - prospecting target layer but the fault penetrates into the ore - prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate into the ore - prospecting target layer, then the secondary potential exploration target area is determined as a tertiary class 2 potential exploration target area.

[0223] For example, for the secondary potential exploration target area determined previously, the following tertiary potential exploration target areas can be determined using the above method:

[0224] If the bulge in the a1 - type potential exploration target area causes folding of the ore - prospecting target layer and the fault penetrates into the ore - prospecting target layer, then the a1 - type potential exploration target area is further determined as an a11 - type potential exploration target area;

[0225] If the bulge in the a1 - type potential exploration target area does not cause folding of the ore - prospecting target layer but the fault penetrates into the ore - prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate into the ore - prospecting target layer, then the a1 - type potential exploration target area is further determined as an a12 - type potential exploration target area;

[0226] If the bulge in the a2 - type potential exploration target area causes folding of the ore - prospecting target layer and the fault penetrates into the ore - prospecting target layer, then the a2 - type potential exploration target area is further determined as an a21 - type potential exploration target area;

[0227] If the bulge in the a2 - type potential exploration target area does not cause folding of the ore - prospecting target layer but the fault penetrates into the ore - prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate into the ore - prospecting target layer, then the a2 - type potential exploration target area is further determined as an a22 - type potential exploration target area;

[0228] If the bulge in the b1 - type potential exploration target area causes folding of the ore - prospecting target layer and the fault penetrates into the ore - prospecting target layer, then the b1 - type potential exploration target area is further determined as a b11 - type potential exploration target area;

[0229] If the bulge in the b1 - type potential exploration target area does not cause folding of the ore - prospecting target layer but the fault penetrates into the ore - prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate into the ore - prospecting target layer, then the b1 - type potential exploration target area is further determined as a b12 - type potential exploration target area;

[0230] If the bulge of the potential exploration target area of Class B2 causes folding of the ore-prospecting target layer and the fault penetrates the ore-prospecting target layer, then the potential exploration target area of Class B2 is further determined as the potential exploration target area of Class B21;

[0231] If the bulge of the potential exploration target area of Class B2 does not cause folding of the ore-prospecting target layer but the fault penetrates the ore-prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate the ore-prospecting target layer, then the potential exploration target area of Class B2 is further determined as the potential exploration target area of Class B22;

[0232] If the bulge of the potential exploration target area of Class C1 causes folding of the ore-prospecting target layer and the fault penetrates the ore-prospecting target layer, then the potential exploration target area of Class C1 is further determined as the potential exploration target area of Class C11;

[0233] If the bulge of the potential exploration target area of Class C1 does not cause folding of the ore-prospecting target layer but the fault penetrates the ore-prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate the ore-prospecting target layer, then the potential exploration target area of Class C1 is further determined as the potential exploration target area of Class C12;

[0234] If the bulge of the potential exploration target area of Class C2 causes folding of the ore-prospecting target layer and the fault penetrates the ore-prospecting target layer, then the potential exploration target area of Class C2 is further determined as the potential exploration target area of Class C21;

[0235] If the bulge of the potential exploration target area of Class C2 does not cause folding of the ore-prospecting target layer but the fault penetrates the ore-prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate the ore-prospecting target layer, then the potential exploration target area of Class C2 is further determined as the potential exploration target area of Class C22;

[0236] If the bulge of the potential exploration target area of Class D1 causes folding of the ore-prospecting target layer and the fault penetrates the ore-prospecting target layer, then the potential exploration target area of Class D1 is further determined as the potential exploration target area of Class D11;

[0237] If the bulge of the potential exploration target area of Class D1 does not cause folding of the ore-prospecting target layer but the fault penetrates the ore-prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate the ore-prospecting target layer, then the potential exploration target area of Class D1 is further determined as the potential exploration target area of Class D12;

[0238] If the bulge of the potential exploration target area of Class D2 causes folding of the ore-prospecting target layer and the fault penetrates the ore-prospecting target layer, then the potential exploration target area of Class D2 is further determined as the potential exploration target area of Class D21;

[0239] If the bulge of the potential exploration target area of Class D2 does not cause folding of the ore-prospecting target layer but the fault penetrates the ore-prospecting target layer, or the bulge causes folding of the formation but the fault does not penetrate the ore-prospecting target layer, then the potential exploration target area of Class D2 is further determined as the potential exploration target area of Class D22.

[0240] This application obtains geological data of sedimentary basins, and determines favorable ore-forming structural units based on the spatial distribution, structural and stratigraphic characteristics of secondary and tertiary structural units in the sedimentary basins. For various ore-forming structural units, the uplifts and faults at the boundaries of the structural units are taken as important signs for prospecting. Combining geological and geophysical prospecting methods, the spatial distribution laws of the uplifts (sags, local protrusions) and faults at the boundaries of the structural units, and / or the characteristics of Bouguer gravity anomaly isograms in the area are analyzed to delineate the first-level dominant exploration target areas, the first-level good exploration target areas, and the first-level potential exploration target areas. It can not only accurately lock in the preferred targets for sandstone-type uranium ore exploration areas, but also significantly reduce the blindness in the prospecting process and improve the exploration efficiency. On this basis, further identify whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layers in the first-level dominant exploration target areas according to seismic data to determine the types of second-level dominant exploration target areas; judge whether the protrusions in the second-level dominant exploration target areas cause folds in the ore-prospecting target layers and whether the faults penetrate the ore-prospecting target layers according to seismic data, and determine the third-level dominant exploration target areas according to the judgment results. Thus, it further accurately hits the sandstone-type uranium ore exploration target areas and improves the prospecting accuracy and efficiency. To sum up, based on the in-depth analysis of the uranium-ore-forming characteristics controlled by the boundaries of structural units, this application proposes to use the uplifts and faults at the boundaries of structural units as important signs for prospecting, and combines geological and geophysical prospecting methods to form a new, efficient and low-cost prospecting method. This method can not only accurately lock in the preferred targets for sandstone-type uranium ore exploration areas, but also significantly reduce the blindness in the prospecting process and improve the exploration efficiency.

[0241] In the embodiments of this application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent the cases of A existing alone, A and B existing simultaneously, and B existing alone. Where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, and c can represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, and c can be single or multiple.

[0242] As described above, the above are only specific embodiments of this application. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. The protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. A prospecting method for sandstone-type uranium ore based on the boundaries of structural units, characterized in that, The method includes: Obtaining geological data of a sedimentary basin, determining the spatial distribution of tectonic units, tectonic and stratigraphic characteristics in the sedimentary basin, and determining the types of favorable ore-forming tectonic units according to the spatial distribution, tectonic and stratigraphic characteristics of the tectonic units; For different types of favorable ore-forming tectonic units, combining the gravity data and / or seismic data and / or oil and gas occurrence conditions of the favorable ore-forming tectonic units to determine the primary exploration target areas for sandstone-type uranium deposits, where the primary exploration target areas include primary superior exploration target areas and / or primary good exploration target areas and / or primary potential exploration target areas; The obtaining of geological data of a sedimentary basin, determining the spatial distribution of tectonic units, tectonic and stratigraphic characteristics in the sedimentary basin, and determining the types of favorable ore-forming tectonic units according to the spatial distribution, tectonic and stratigraphic characteristics of the tectonic units includes: If tectonic unit B is adjacent to tectonic unit A where the bedrock is exposed, then determine that tectonic unit B is a superior favorable ore-forming tectonic unit; If tectonic unit A is a large anticline, then determine that tectonic unit A and its adjacent tectonic unit B are good favorable ore-forming tectonic units; When the ore-prospecting target horizons of adjacent tectonic units A and B are both overlain by sedimentary layers but there are differences in their basement depths, if the basement of tectonic unit A with a smaller basement depth is a slope terrain, then both tectonic unit A and tectonic unit B are potential favorable ore-forming tectonic units; if the basement of tectonic unit A with a smaller basement depth is uniform, then tectonic unit B with a larger basement depth is a potential favorable ore-forming tectonic unit; Wherein, the boundary of tectonic unit B close to tectonic unit A is denoted as the first tectonic unit boundary, and the boundary of tectonic unit B far from tectonic unit A is denoted as the second tectonic unit boundary.

2. The method according to claim 1, wherein For different types of favorable ore-forming tectonic units, combining the gravity data and / or seismic data and / or oil and gas occurrence conditions of the favorable ore-forming tectonic units to determine the primary exploration target areas for sandstone-type uranium deposits, where the primary exploration target areas include primary superior exploration target areas and / or primary good exploration target areas and / or primary potential exploration target areas, includes: If the favorable ore-forming tectonic unit is a superior favorable ore-forming tectonic unit, then: Analyze the reduction intensity of the ore-prospecting target horizon of tectonic unit B to determine the type of the ore-prospecting target horizon of tectonic unit B; Take tectonic unit A as the source area of erosion, and divide tectonic unit B into different types of ore-prospecting prospective areas starting from the first tectonic unit boundary according to different types of ore-prospecting target horizons; Combining the gravity data and / or seismic data and / or oil and gas occurrence conditions of the ore-prospecting prospective areas to determine the type of primary superior exploration target areas.

3. The method according to claim 2, wherein The analyzing of the reduction intensity of the ore-prospecting target horizon of tectonic unit B to determine the type of the ore-prospecting target horizon of tectonic unit B includes: If the ore-prospecting target horizon of tectonic unit B is a coal-bearing stratum or the ore-prospecting target horizon was formed in a warm and humid paleoclimate environment, then determine that the ore-prospecting target horizon of tectonic unit B is an ore-prospecting target horizon with a first-class reduction intensity; If the ore-prospecting target horizon of tectonic unit B was formed in a paleoclimate environment of the transition from warm and humid to arid, then determine that the ore-prospecting target horizon of tectonic unit B is an ore-prospecting target horizon with a second-class reduction intensity; If the ore-prospecting target horizon of tectonic unit B was formed in a dry and hot paleoclimate environment, then determine that the ore-prospecting target horizon of tectonic unit B is an ore-prospecting target horizon with a third-class reduction intensity.

4. The method according to claim 3, characterized in that, Taking the tectonic unit A as the erosion source area, starting from the boundary of the first tectonic unit, the tectonic unit B is divided into different types of prospective areas for ore prospecting according to different types of target ore-bearing horizons, including: If the target ore-bearing horizon of the tectonic unit B is a target ore-bearing horizon of the first reduction intensity, the tectonic unit B within a distance less than or equal to 30 km from the boundary of the first tectonic unit is divided into a type of prospective area for ore prospecting; If the target ore-bearing horizon of the tectonic unit B is a target ore-bearing horizon of the second reduction intensity, the tectonic unit B within a distance of 30 - 100 km from the boundary of the first tectonic unit is divided into b type of prospective area for ore prospecting; If the target ore-bearing horizon of the tectonic unit B is a target ore-bearing horizon of the third reduction intensity, the tectonic unit B within a distance of 100 - 250 km from the boundary of the first tectonic unit is divided into c type of prospective area for ore prospecting.

5. The method according to claim 4, wherein Combining the gravity data and / or seismic data and / or oil and gas occurrence conditions of the prospective area for ore prospecting, determining the types of primary favorable exploration target areas, including: For a type and b type of prospective areas for ore prospecting, the gravity data within the prospective area for ore prospecting is processed and inverted to obtain a structural map including the basement undulation morphology and the spatial distribution of faults and the Bouguer gravity field contour map, analyzing the spatial distribution law of different structures within the area, and determining the types of primary favorable exploration target areas according to the spatial distribution law of the different structures; For c type of prospective area for ore prospecting, along the flow direction of uranium-bearing and oxygen-bearing water, searching for the oil and gas occurrence conditions in the area where the uranium-bearing and oxygen-bearing water flows through, and determining the types of primary favorable exploration target areas according to the oil and gas occurrence conditions in the area where the uranium-bearing and oxygen-bearing water flows through.

6. The method according to claim 5, wherein For a type and b type of prospective areas for ore prospecting, the gravity data within the prospective area for ore prospecting is processed and inverted to obtain a structural map including the basement undulation morphology and the spatial distribution of faults and the Bouguer gravity field contour map, analyzing the spatial distribution law of different structures within the area, and determining the types of primary favorable exploration target areas, including: For a type of prospective area for ore prospecting, the gravity data within the a type of prospective area for ore prospecting is processed and inverted to obtain a structural map including the basement undulation morphology and the spatial distribution of faults and the Bouguer gravity field contour map, analyzing the spatial distribution law of uplifts and faults within the area; If multiple uplifts and faults appear in groups in Region 1, and the contour lines of the Bouguer gravity anomaly field in Region 1 show severe co-directional distortion, then Region 1 is divided into a1 type of favorable exploration target area; If there is a single uplift and fault in Region 2, and the contour lines of the Bouguer gravity anomaly field in Region 2 show co-directional distortion, then Region 2 is divided into a2 type of favorable exploration target area; For b type of prospective area for ore prospecting, the gravity data within the b type of prospective area for ore prospecting is processed and inverted to obtain a structural map including the basement undulation morphology and the spatial distribution of faults and the Bouguer gravity field contour map, analyzing the spatial distribution law of depressions and faults within the area; If there is a large depression with an area greater than 20 km 2 and the isopleths of the Bouguer gravity anomaly field at the edge of the large depression show serious parallel distortion, then the edge of the large depression is divided into a Class b1 preferred exploration target area; If there is a medium-sized depression with an area greater than or equal to 5 km 2 and less than or equal to 20 km 2 and the isopleths of the Bouguer gravity anomaly field on the edge of the medium-sized depression show distortion in the same row, then the edge of the medium-sized depression is divided into a Class b2 preferential exploration target area; If there is a small depression with an area less than 5 km 2 and the isograds of the Bouguer gravity anomaly field at the edge of the small depression show the same-line distortion, then the edge of the small depression is divided into a Class b3 preferential exploration target area.

7. The method according to claim 5, characterized in that, For c type of prospective area for ore prospecting, along the flow direction of uranium-bearing and oxygen-bearing water, searching for the oil and gas occurrence conditions in the area where the uranium-bearing and oxygen-bearing water flows through, and determining the types of primary favorable exploration target areas according to the oil and gas occurrence conditions in the area where the uranium-bearing and oxygen-bearing water flows through, including: If there are oil and gas enrichment structural units in the area where the uranium-bearing and oxygen-containing water flow through, then the non-oil and gas enrichment structural units in the Class C prospecting far-reaching areas are divided into Class C1 dominant exploration target areas, and the oil and gas enrichment structural units in the Class C prospecting far-reaching areas are divided into Class C2 dominant exploration target areas.

8. The method according to claim 1, wherein For different types of favorable ore-forming structural units, combining the gravity data and / or seismic data and / or oil and gas occurrence conditions of the favorable ore-forming structural units, determine the primary exploration target areas for sandstone-type uranium deposits. The primary exploration target areas include primary dominant exploration target areas and / or primary good exploration target areas and / or primary potential exploration target areas, and also include: If the favorable ore-forming structural unit is a good favorable ore-forming structural unit, then: Use seismic data and gravity data to invert and reveal the fracture and local uplift development conditions of the good favorable ore-forming structural unit, and determine the type of primary good exploration target area according to the fracture and local uplift development conditions.

9. The method according to claim 8, wherein The use of seismic data and gravity data to invert and reveal the fracture and local uplift development conditions of the good favorable ore-forming structural unit, and determine the type of primary good exploration target area according to the fracture and local uplift development conditions, includes: If the fracture and local uplift are located between the long axis of the anticline and the boundary of the first structural unit and are close to the boundary of the first structural unit, then determine that the good favorable ore-forming structural unit is a Class A good exploration target area; If the fracture and local uplift are located between the long axis of the anticline and the boundary of the first structural unit and are close to the long axis of the anticline, then determine that the good favorable ore-forming structural unit is a Class B good exploration target area; If the fracture and local uplift are located in Structural Unit B and are close to the boundary of the first structural unit, then determine that the good favorable ore-forming structural unit is a Class C good exploration target area.

10. The method according to claim 1, characterized in that, For different types of favorable ore-forming structural units, combining the gravity data and / or seismic data and / or oil and gas occurrence conditions of the favorable ore-forming structural units, determine the primary exploration target areas for sandstone-type uranium deposits. The primary exploration target areas include primary dominant exploration target areas and / or primary good exploration target areas and / or primary potential exploration target areas, and also include: If the favorable ore-forming structural unit is a potential favorable ore-forming structural unit, then: Use seismic data and gravity data to invert and reveal the development conditions of the basement fractures and local uplifts of Structural Unit B within a range of less than or equal to 30 km from the boundary of the first structural unit, as well as the development conditions of the basement fractures and local uplifts of the entire Structural Unit A, and determine the type of primary potential exploration target area according to the development conditions of the basement fractures and local uplifts of Structural Unit B within a range of less than or equal to 30 km from the boundary of the first structural unit, as well as the development conditions of the basement fractures and local uplifts of the entire Structural Unit A.

11. The method according to claim 10, wherein Inverting and revealing the development of basement faults and local uplifts of tectonic unit B within a range less than or equal to 30 km from the boundary of the first tectonic unit, as well as the development of basement faults and local uplifts of the entire tectonic unit A, and determining the types of primary potential exploration target areas according to the development of basement faults and local uplifts of tectonic unit B within a range less than or equal to 30 km from the boundary of the first tectonic unit, and the development of basement faults and local uplifts of the entire tectonic unit A, including: When the basement of tectonic unit A with a relatively small basement depth is a slope terrain, and both tectonic unit A and tectonic unit B are potentially favorable ore-forming tectonic units: If the basement faults and local uplifts are located in tectonic unit A and close to the boundary of the first tectonic unit, then it is determined that the potentially favorable ore-forming tectonic unit is a type-a potential exploration target area; If the basement faults and local uplifts are located in tectonic unit B within a range less than or equal to 10 km from the boundary of the first tectonic unit, then it is determined that the potentially favorable ore-forming tectonic unit is a type-b potential exploration target area; If the basement faults and local uplifts are located in tectonic unit B within a range of 10 - 30 km from the boundary of the first tectonic unit, then it is determined that the potentially favorable ore-forming tectonic unit is a type-c potential exploration target area; When the basement depth of tectonic unit A with a relatively small basement depth is uniform, and tectonic unit B with a relatively large basement depth is a potentially favorable ore-forming tectonic unit: If the basement faults and local uplifts are located near both sides of the boundary of the first tectonic unit, then it is determined that the potentially favorable ore-forming tectonic unit is a type-d potential exploration target area.

12. The method according to any one of claims 1-11, characterized in that It also includes: Identifying whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the primary exploration target area based on seismic data, and determining the types of secondary exploration target areas according to the identification results.

13. The method according to claim 12, wherein The identifying whether there are sheet sand bodies or lenticular sand bodies in the ore-prospecting target layer within the primary exploration target area based on seismic data, and determining the types of secondary exploration target areas according to the identification results, includes: If there are sheet sand bodies in the ore-prospecting target layer within the primary exploration target area, then the primary exploration target area is determined as a secondary class-1 exploration target area; If there are lenticular sand bodies in the ore-prospecting target layer within the primary exploration target area, then the primary exploration target area is determined as a secondary class-2 exploration target area.

14. The method according to claim 12, wherein Judging whether the uplift within the secondary exploration target area causes folding of the ore-prospecting target layer and whether the fault penetrates into the ore-prospecting target layer based on seismic data, and determining the types of tertiary exploration target areas according to the judgment results.

15. The method according to claim 14, wherein Judging whether the uplift within the secondary exploration target area causes folding of the ore-prospecting target layer and whether the fault penetrates into the ore-prospecting target layer based on seismic data, and determining the types of tertiary exploration target areas according to the judgment results, includes: If the uplift within the secondary exploration target area causes folding of the ore-prospecting target layer and the fault penetrates into the ore-prospecting target layer, then the secondary exploration target area is determined as a tertiary class-1 exploration target area; If the uplift within the secondary exploration target area does not cause folding of the ore-prospecting target layer but the fault penetrates into the ore-prospecting target layer, or the uplift causes folding of the strata but the fault does not penetrate into the ore-prospecting target layer, then the secondary exploration target area is determined as a tertiary class-2 exploration target area.

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