Sandstone type uranium ore prospecting method based on tectonic unit boundary

Abstract

The invention provides a sandstone type uranium ore prospecting method based on a tectonic unit boundary, and the method comprises the steps: obtaining the geological data of a sedimentary basin, determining the spatial distribution and the tectonic and stratum characteristics of tectonic units in the sedimentary basin, and determining the types of beneficial metallogenic tectonic units according to the spatial distribution and the tectonic and stratum characteristics of the tectonic units; and determining a first-level exploration target region of the sandstone type uranium mine by combining the gravity data and / or seismic data and / or oil and gas bearing conditions of the favorable metallogenic structure units for different types of favorable metallogenic structure units. According to the method, on the basis of deep analysis of uranium-controlled metallogenic characteristics of the tectonic unit boundary, the upheaval and fracture of the tectonic unit boundary are taken as important marks for prospecting, and geological and geophysical prospecting methods are combined, so that a novel efficient and low-cost prospecting method is formed, an optimal target of a sandstone type uranium ore prospecting area can be accurately locked, and the prospecting efficiency of the sandstone type uranium ore prospecting area is improved. The blindness in the prospecting process can be obviously reduced, and the exploration efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of uranium geological exploration, and in particular to a sandstone-type uranium prospecting method based on the boundary of a structural unit. Background Art

[0002] Uranium resources are important strategic mineral resources. In the early days, uranium resources were mainly obtained by exploring hard rock uranium deposits. This type of ore deposit has the characteristics of high grade and shallow burial, and radioactive exploration is its main exploration method. However, with the continuous advancement of in-situ leaching and smelting technology, sandstone uranium deposits have become the focus of current uranium resource exploration and research due to their low mining cost and environmental advantages. However, due to the lack of obvious differences in the physical properties between the ore-bearing rocks and the surrounding rocks of sandstone uranium deposits, and the deep burial of the ore body, traditional ground exploration methods (including radioactive exploration) have limited effects. Chinese patent CN118330775A discloses a method and system for delineating uranium deposits under an extensional background, providing a method and system for delineating uranium deposits under an extensional background that combines multi-source geological data and gives priority to local exploration, providing a basis for local exploration, but it is impossible to analyze and delineate the exploration target area as a whole under the regional background. Therefore, sandstone uranium exploration is facing the dual challenges of "where to find" and "how to find". Summary of the invention

[0003] In view of the problems existing in the prior art, the present application provides a sandstone-type uranium prospecting method based on the boundary of tectonic units to solve the technical problem that the existing uranium prospecting methods are not effective. The method comprises: Obtain geological data of the sedimentary basin, determine the spatial distribution, structural and stratigraphic characteristics of the tectonic units in the sedimentary basin, and determine the type of favorable mineralization tectonic units based on the spatial distribution, structural and stratigraphic characteristics of the tectonic units; For different types of favorable mineralization structural units, the primary exploration target areas of sandstone-type uranium deposits are determined in combination with the gravity data and / or seismic data and / or oil and gas conditions of the favorable mineralization structural units. 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.

[0004] Furthermore, the acquisition of geological data of the sedimentary basin, determination of the spatial distribution, structural and stratigraphic characteristics of the tectonic units in the sedimentary basin, and determination of the type of favorable mineralization tectonic units according to the spatial distribution, structural and stratigraphic characteristics of the tectonic units include: If tectonic unit B is adjacent to tectonic unit A where bedrock is exposed, then tectonic unit B is determined to be a dominant and favorable mineralization tectonic unit; If structural unit A is a large anticline, structural unit A and its adjacent structural unit B are considered to be favorable mineralization structural units; When the prospecting target layers of adjacent tectonic units A and B are both covered by sedimentary layers, but there are differences in the burial depth of their bases, if the base of tectonic unit A with a smaller burial depth is a slope terrain, then both tectonic units A and B are potentially favorable metallogenic tectonic units; if the base of tectonic unit A with a smaller burial depth is uniform, then tectonic unit B with a larger burial depth is a potentially favorable metallogenic tectonic unit; The boundary of the structural unit B close to the structural unit A is recorded as the first structural unit boundary, and the boundary of the structural unit B far from the structural unit A is recorded as the second structural unit boundary.

[0005] Further, for different types of favorable metallogenic structural units, combined with gravity data and / or seismic data and / or oil and gas conditions of the favorable metallogenic structural units, the primary exploration target area of ​​sandstone-type uranium deposits is determined, and the primary exploration target area includes a primary advantageous exploration target area and / or a primary good exploration target area and / or a primary potential exploration target area, including: If the favorable metallogenic structural unit is the dominant favorable metallogenic structural unit, then: Analyze the reduction strength of the prospecting target layer of tectonic unit B and determine the type of the prospecting target layer of tectonic unit B; Taking tectonic unit A as the erosion source area, according to different types of prospecting target layers, tectonic unit B is divided into different types of prospecting prospecting areas with the boundary of the first tectonic unit as the starting point; Based on the gravity data and / or seismic data and / or oil and gas content of the prospecting area, the type of primary advantageous exploration target area is determined.

[0006] Further, the analysis of the reducing strength of the prospecting target layer of the structural unit B to determine the type of the prospecting target layer of the structural unit B includes: If the prospecting target layer of tectonic unit B is a coal-bearing stratum or the prospecting target layer was formed in a warm and humid paleoclimate environment, then the prospecting target layer of tectonic unit B is determined to be a type of reduction intensity prospecting target layer; If the prospecting target layer of tectonic unit B was formed in the paleoclimate environment of warm-humid-arid transition, then the prospecting target layer of tectonic unit B is determined to be the second type of reduction intensity prospecting target layer; If the prospecting target layer of tectonic unit B was formed in a dry and hot paleoclimate environment, then the prospecting target layer of tectonic unit B is determined to be a third-class reduction intensity prospecting target layer.

[0007] Furthermore, the structural unit A is taken as the erosion source area, and the structural unit B is divided into different types of prospecting prospecting areas according to different types of prospecting target layers, starting from the boundary of the first structural unit, including: If the prospecting target layer of tectonic unit B is a type I reduction intensity prospecting target layer, then the tectonic unit B within 30 km from the boundary of the first tectonic unit is divided into a type A prospecting prospecting area; If the prospecting target layer of tectonic unit B is a type II reduction intensity prospecting target layer, then the tectonic unit B within 30-100km from the boundary of the first tectonic unit is divided into a type B prospecting prospecting area; If the prospecting target layer of tectonic unit B is a Class III reduction intensity prospecting target layer, then the tectonic unit B within 100-250km from the boundary of the first tectonic unit is divided into a Class C prospecting prospecting area.

[0008] Furthermore, the determination of the type of primary advantageous exploration target area by combining the gravity data and / or seismic data and / or oil and gas content of the prospecting area includes: For the prospecting areas of type A and type B, the gravity data in the prospecting areas are processed and inverted to obtain structural maps including basement undulation and spatial distribution of faults and contour maps of Bouguer gravity field, analyze the spatial distribution of different structures in the area, and determine the type of primary advantageous exploration target area based on the spatial distribution of different structures; For Class C prospecting areas, the oil and gas content of the area through which the uranium-containing oxygen-containing water flows is searched along the flow direction of the uranium-containing oxygen-containing water. The type of primary advantageous exploration target area is determined based on the oil and gas content of the area through which the uranium-containing oxygen-containing water flows.

[0009] Furthermore, for the type A prospecting area and the type B prospecting area, the gravity data in the prospecting area is processed and inverted to obtain structural maps including basement undulation and fracture spatial distribution and Bouguer gravity field contour maps, analyze the spatial distribution laws of different structures in the area, and determine the type of primary advantageous exploration target area according to the spatial distribution laws of the different structures, including: For the type A prospecting area, the gravity data in the type A prospecting area are processed and inverted to obtain structural maps including the basement undulation and the spatial distribution of faults and the contour map of the Bouguer gravity field, and to analyze the spatial distribution of uplifts and faults in the area; If multiple uplifts and faults appear in groups in Area 1, and the contour lines of Bouguer gravity anomaly field in Area 1 are seriously distorted, then the Area 1 is classified as a Class A1 superior exploration target area; If there is a single uplift and fault in Area 2, and the contour lines of the Bouguer gravity anomaly field in Area 2 are distorted in the same direction, then Area 2 is classified as a type A2 advantageous exploration target area; For the B-type prospecting areas, the gravity data in the B-type prospecting areas are processed and inverted to obtain structural maps including the basement undulation and the spatial distribution of faults and the Bouguer gravity field contour map, and analyze the spatial distribution of depressions and faults in the area; If the area is larger than 20km 2If there is a large depression, and the contour lines of the Bouguer gravity anomaly field at the edge of the large depression are seriously distorted, the edge of the large depression is classified as a B1 type advantageous exploration target area; If the area is greater than or equal to 5km 2 And less than or equal to 20km 2 If there is a medium-sized depression, and the contour lines of the Bouguer gravity anomaly field at the edge of the medium-sized depression are distorted in the same direction, the edge of the medium-sized depression is classified as a b2 type advantageous exploration target area; If the area is less than 5km 2 If a small depression is found and the contour lines of the Bouguer gravity anomaly field at the edge of the small depression are distorted in the same direction, the edge of the small depression is classified as a b3 type advantageous exploration target area.

[0010] Furthermore, for the C-type prospecting prospecting area, the oil and gas content of the area where the uranium-containing oxygen-containing water flows is found along the flow direction of the uranium-containing oxygen-containing water, and the type of primary advantageous exploration target area is determined according to the oil and gas content of the area where the uranium-containing oxygen-containing water flows, including: If there are oil and gas enriched structural units in the area where uranium-containing and oxygen-containing water flows, the non-oil and gas enriched structural units in the Class C prospecting prospecting area shall be divided into Class C1 advantageous exploration target areas, and the oil and gas enriched structural units in the Class C prospecting prospecting area shall be divided into Class C2 advantageous exploration target areas.

[0011] Further, for different types of favorable metallogenic structural units, the primary exploration target area of ​​sandstone-type uranium deposits is determined in combination with gravity data and / or seismic data and / or oil and gas conditions of the favorable metallogenic structural units, and the primary exploration target area includes a primary advantageous exploration target area and / or a primary good exploration target area and / or a primary potential exploration target area, and also includes: If the favorable mineralization structural unit is a good favorable mineralization structural unit, then: Seismic data and gravity data are used to invert and reveal the development of faults and local uplifts in favorable mineralization structural units. Based on the development of the faults and local uplifts, the type of first-level good exploration target area is determined.

[0012] Furthermore, the use of seismic data and gravity data to invert and reveal the development of faults and local uplifts of favorable mineralization structural units, and the determination of the first-level good exploration target area type according to the development of the faults and local uplifts, include: If the fault and the local bulge 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, the favorable mineralization structural unit is determined to be a good exploration target area of ​​Class A; If the fault and the local bulge are located between the long axis of the anticline and the boundary of the first structural unit and close to the long axis of the anticline, the favorable mineralization structural unit is determined to be a good exploration target area of ​​type B; If the fault and the local uplift are located in structural unit B and close to the boundary of the first structural unit, the favorable mineralization structural unit is determined to be a good exploration target area of ​​Class C.

[0013] Further, for different types of favorable metallogenic structural units, the primary exploration target area of ​​sandstone-type uranium deposits is determined in combination with gravity data and / or seismic data and / or oil and gas conditions of the favorable metallogenic structural units, and the primary exploration target area includes a primary advantageous exploration target area and / or a primary good exploration target area and / or a primary potential exploration target area, and also includes: If the favorable metallogenic structural unit is a potentially favorable metallogenic structural unit, then: Seismic data and gravity data are used to invert and reveal the development of basement faults and local uplifts in tectonic unit B within 30 km of the boundary of the first tectonic unit, as well as the development of basement faults and local uplifts in tectonic unit A globally. Based on the development of basement faults and local uplifts in tectonic unit B within 30 km of the boundary of the first tectonic unit, as well as the development of basement faults and local uplifts in tectonic unit A globally, the type of primary potential exploration target area is determined.

[0014] Furthermore, the use of seismic data and gravity data to invert and reveal the development of basement faults and local bulges of tectonic unit B within 30 km from the boundary of the first tectonic unit, as well as the development of basement faults and local bulges of tectonic unit A globally, according to the development of basement faults and local bulges of tectonic unit B within 30 km from the boundary of the first tectonic unit, as well as the development of basement faults and local bulges of tectonic unit A globally, the type of primary potential exploration target area is determined, including: When the base of structural unit A with a smaller base burial depth is a slope terrain, and both structural unit A and structural unit B are potentially favorable mineralization structural units: If the basement fault and the local bulge are located in structural unit A and close to the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a potential exploration target area of ​​type A; If the basement fault and the local uplift are located in structural unit B within 10 km from the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a potential exploration target area of ​​type B; If the basement fault and the local uplift are located in the structural unit B within 10-30 km from the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a potential exploration target area of ​​type C; When the base burial depth of structural unit A is uniform, and the base burial depth of structural unit B is large, it is a potential favorable mineralization structural unit: If the basement fault and the local uplift are located near both sides of the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a Class D potential exploration target area.

[0015] Furthermore, it also includes: Based on the seismic data, it is identified whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layer within the primary exploration target area, and the type of secondary exploration target area is determined based on the identification results.

[0016] Further, the step of identifying whether there is a sheet-like sand body or a lenticular sand body in the prospecting target layer within the primary exploration target area according to the seismic data, and determining the type of the secondary exploration target area according to the identification result, includes: If there is a sheet-like sand body in the prospecting target layer within the primary exploration target area, the primary exploration target area shall be determined as a secondary type 1 exploration target area; If there is a lens-shaped sand body in the prospecting target layer within the primary exploration target area, the primary exploration target area will be determined as a secondary Class 2 exploration target area.

[0017] Furthermore, it is determined based on the seismic data whether the uplift in the secondary exploration target area causes folding of the target layer for prospecting and whether the fault penetrates the target layer for prospecting. Based on the judgment results, the type of the tertiary exploration target area is determined.

[0018] Furthermore, the seismic data is used to determine whether the bulges in the secondary exploration target area cause folds in the target layer for prospecting and whether the faults penetrate into the target layer for prospecting. Based on the determination results, the type of the tertiary exploration target area is determined, including: If the bulge in the secondary exploration target area causes folding of the target layer for prospecting and the fault penetrates the target layer for prospecting, the secondary exploration target area shall be determined as a third-level Class 1 exploration target area; If the uplift in the secondary exploration target area does not cause folding in the target layer for prospecting but the fault penetrates into the target layer for prospecting, or the uplift causes stratum folding but the fault does not penetrate into the target layer for prospecting, then the secondary exploration target area shall be determined as a third-level Class 2 exploration target area.

[0019] Based on the above invention content, compared with the prior art, the present application obtains geological data of sedimentary basins, and determines favorable mineralization structural units according to the spatial distribution, structural and stratigraphic characteristics of structural units in sedimentary basins; for various mineralization structural units, the uplifts and faults at the boundaries of structural units are used as important signs for prospecting, and the spatial distribution law of uplifts (depressions, local bulges) and faults at the boundaries of structural units, and / or the characteristics of Bouguer gravity anomaly contour lines in the region are analyzed in combination with geological and geophysical prospecting methods to delineate the primary advantageous exploration target area, the primary good exploration target area and the primary potential exploration target area. It can not only accurately lock the preferred target of the sandstone-type uranium ore exploration area, but also significantly reduce the blindness in the prospecting process and improve the exploration efficiency. On this basis, the type of the secondary advantageous exploration target area is determined by further identifying whether there is a sheet-like sand body or a lens-like sand body in the prospecting target layer in the primary advantageous exploration target area according to seismic data; it is determined according to seismic data whether the uplift in the secondary advantageous exploration target area causes the fold of the prospecting target layer and whether the fault penetrates the prospecting target layer, and the tertiary advantageous exploration target area is determined according to the judgment result. Thereby further accurately hitting the sandstone-type uranium exploration target area and improving the accuracy and efficiency of prospecting. In summary, based on an in-depth analysis of the uranium mineralization characteristics controlled by the tectonic unit boundaries, this application uses the uplifts and faults at the boundaries of tectonic units as important signs of prospecting, and combines geological and geophysical prospecting methods to form a new method of prospecting that is efficient and low-cost. This method can not only accurately lock the preferred targets in the sandstone-type uranium exploration area, but also significantly reduce the blindness in the prospecting process and improve exploration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic flow chart of a sandstone-type uranium ore prospecting method based on tectonic unit boundaries provided in an embodiment of the present application; Figure 2 It is a schematic diagram of advantageous mineralization structural units and boundaries provided in the embodiments of the present application; Figure 3 It is a schematic diagram of favorable mineralization structural units and boundaries provided in the embodiments of the present application; Figure 4 It is a schematic diagram of the potentially favorable mineralization structural units and boundaries provided in the embodiments of the present application. DETAILED DESCRIPTION

[0022] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0024] See also Figure 1 , is a schematic diagram of a flow chart of a sandstone-type uranium ore prospecting method based on tectonic unit boundaries provided by an embodiment of the present invention. Figure 1 As shown, the method specifically includes: Step S1: Acquire geological data of a sedimentary basin, determine the spatial distribution, structural and stratigraphic characteristics of the tectonic units in the sedimentary basin, and determine the type of favorable mineralization tectonic units based on the spatial distribution, structural and stratigraphic characteristics of the tectonic units.

[0025] In this embodiment, the type of favorable metallogenic structural unit is determined according to the following method: like Figure 2 As shown, if tectonic unit B is adjacent to tectonic unit A where bedrock is exposed, tectonic unit B is determined to be a dominant and favorable mineralization tectonic unit.

[0026] like Figure 3 As shown, if structural unit A is a large anticline, structural unit A and its adjacent structural unit B are determined to be good and favorable mineralization structural units.

[0027] like Figure 4 As shown in Figure 2, the prospecting target layers of adjacent tectonic units A and B are both covered by sedimentary layers, but there is a difference in the basement burial depth between tectonic units A and B. Figure 4 As shown in (a), if the base of structural unit A with a smaller base burial depth is a slope terrain, then both structural unit A and structural unit B are potentially favorable mineralization structural units; Figure 4 As shown in (b), if the basement burial depth of structural unit A with a smaller basement burial depth is uniform, then structural unit B with a larger basement burial depth is a potentially favorable mineralization structural unit.

[0028] Potentially favorable mineralization structural units may lack sufficient uranium source supply and have lower mineralization potential than the structural units and anticline structural units adjacent to the bedrock outcrop area.

[0029] Step S2: For different types of favorable mineralization structural units, the primary exploration target area of ​​sandstone-type uranium deposits is determined in combination with the gravity data and / or seismic data and / or oil and gas content of the favorable mineralization structural units, wherein the primary exploration target area includes a primary advantageous exploration target area and / or a primary good exploration target area and / or a primary potential exploration target area. Embodiment 2

[0030] In this embodiment, if the favorable metallogenic structural unit is a dominant favorable metallogenic structural unit, then: Analyze the reducing strength of the prospecting target layer of tectonic unit B and determine the type of the prospecting target layer of tectonic unit B.

[0031] First, collect relevant geological data of the research area, and comprehensively analyze the paleoclimate environment and evolution during the formation of the target stratum and its adjacent strata. Then, determine the type of the target stratum according to the paleoclimate environment and evolution during the formation of the target stratum and its adjacent strata, including: If the prospecting target layer of tectonic unit B is a coal-bearing stratum or the prospecting target layer was formed in a warm and humid paleoclimate environment, then the prospecting target layer of tectonic unit B is determined to be a type of reduction intensity prospecting target layer; If the prospecting target layer of tectonic unit B was formed in the paleoclimate environment of warm-humid-arid transition, then the prospecting target layer of tectonic unit B is determined to be the second type of reduction intensity prospecting target layer; If the prospecting target layer of tectonic unit B was formed in a dry and hot paleoclimate environment, then the prospecting target layer of tectonic unit B is determined to be a third-class reduction intensity prospecting target layer.

[0032] Taking tectonic unit A as the erosion source area, tectonic unit B is divided into different types of prospecting prospecting areas according to different types of prospecting target layers and taking the boundary of the first tectonic unit as the starting point.

[0033] In this embodiment, if the prospecting target layer of structural unit B is a type I reduction intensity prospecting target layer, then the structural unit B within a range of less than or equal to 30 km from the boundary of the first structural unit is classified as a type A prospecting prospecting area; If the prospecting target layer of tectonic unit B is a type II reduction intensity prospecting target layer, then the tectonic unit B within the range of 30-100km from the boundary of the first tectonic unit is divided into a type B prospecting prospecting area; wherein the range of 30-100km is greater than 30km and less than or equal to 100km; If the prospecting target layer of tectonic unit B is a third-class reduction intensity prospecting target layer, the tectonic unit B within the range of 100-250km from the boundary of the first tectonic unit is divided into a class C prospecting prospecting area. Among them, the range of 100-250km is greater than 100km and less than or equal to 250km.

[0034] Based on the gravity data and / or seismic data and / or oil and gas content of the prospecting area, the type of primary advantageous exploration target area is determined.

[0035] In this embodiment, for Class A prospecting areas and Class B prospecting areas, the gravity data within the prospecting areas are processed and inverted 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 patterns of different structures in the area. Based on the spatial distribution patterns of the different structures, the type of primary advantageous exploration target area is determined.

[0036] For Class C prospecting areas, the oil and gas content of the area through which the uranium-containing oxygen-containing water flows is searched along the flow direction of the uranium-containing oxygen-containing water. The type of primary advantageous exploration target area is determined based on the oil and gas content of the area through which the uranium-containing oxygen-containing water flows.

[0037] Specifically, for the type A prospecting area, the gravity data in the type A prospecting area are processed and inverted to obtain structural maps including the basement undulation and the spatial distribution of faults and the contour map of the Bouguer gravity field, and analyze the spatial distribution of uplifts and faults in the area; If multiple uplifts and faults appear in groups in Area 1, and the contour lines of Bouguer gravity anomaly field in Area 1 are seriously distorted, then the Area 1 is classified as a Class A1 superior exploration target area; If there is a single uplift and fault in Area 2, and the contour lines of the Bouguer gravity anomaly field in Area 2 are distorted in the same direction, then Area 2 is classified as a type A2 advantageous exploration target area; For the B-type prospecting areas, the gravity data in the B-type prospecting areas are processed and inverted to obtain structural maps including the basement undulation and the spatial distribution of faults and the Bouguer gravity field contour map, and analyze the spatial distribution of depressions and faults in the area; If the area is larger than 20km 2 If there is a large depression, and the contour lines of the Bouguer gravity anomaly field at the edge of the large depression are seriously distorted, the edge of the large depression is classified as a B1 type advantageous exploration target area; If the area is greater than or equal to 5km 2 And less than or equal to 20km 2 If there is a medium-sized depression, and the contour lines of the Bouguer gravity anomaly field at the edge of the medium-sized depression are distorted in the same direction, the edge of the medium-sized depression is classified as a b2 type advantageous exploration target area; If the area is less than 5km 2 If a small depression is found and the contour lines of the Bouguer gravity anomaly field at the edge of the small depression are distorted in the same direction, the edge of the small depression is classified as a b3 type advantageous exploration target area.

[0038] For the C-type prospecting prospecting area, the oil and gas content of the area where the uranium-containing oxygen-containing water flows is searched along the flow direction of the uranium-containing oxygen-containing water, and the type of primary advantageous exploration target area is determined according to the oil and gas content of the area where the uranium-containing oxygen-containing water flows. Because the C-type prospecting prospecting area is far away from the erosion source area, and these structural units far away from the erosion source area are closer to the oil and gas enrichment structural units. Since the prospecting target layer of the C-type prospecting prospecting area itself has a low organic matter content, deep oil and gas are needed as supplementary organic matter, but moderate oil and gas escape is conducive to uranium mineralization, while excessive oil and gas escape in the oil and gas area is not conducive to uranium mineralization.

[0039] Therefore, if there are oil and gas enriched structural units in the area where uranium-containing and oxygen-containing water flows, the non-oil and gas enriched structural units in the Class C prospecting prospecting area shall be divided into Class C1 advantageous exploration target areas, and the oil and gas enriched structural units in the Class C prospecting prospecting area shall be divided into Class C2 advantageous exploration target areas.

[0040] In this embodiment, it is identified whether there is a sheet-like sand body or a lens-like sand body in the prospecting target layer within the primary exploration target area based on seismic data, and the type of the secondary exploration target area is determined based on the identification result.

[0041] Specifically, it includes: identifying whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layer within the primary advantageous exploration target area based on seismic data, and determining the type of secondary advantageous exploration target area based on the identification results.

[0042] Tectonic unit A is the erosion source area, and uranium-containing oxygen-containing fluids infiltrate into tectonic unit B. If the sand content of the prospecting target layer around the boundary of the tectonic unit is high, it is conducive to the continuous infiltration of uranium-containing oxygen-containing water on the surface, which is beneficial to uranium mineralization. Therefore, it is possible to identify whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layer within the primary advantageous exploration target area based on seismic data, and further determine the type of the secondary advantageous exploration target area based on the identification results.

[0043] In seismic sections, there are obvious differences in the response of reflection axes to sandstone and mudstone. Mudstone usually appears as a reflection axis with strong amplitude, high frequency and good continuity in seismic sections, while sandstone, on the other hand, usually appears as a reflection axis with weak amplitude and relatively high frequency.

[0044] Comparing the reflection characteristics of the ore-bearing layers in the seismic profile, the reflection in-phase circles with weak amplitude and relatively high frequency are circled 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 lens sand bodies.

[0045] Specifically, the type of secondary advantageous exploration target area is further determined according to the following methods: If there is a sheet-like sand body in the prospecting target layer within the primary advantageous exploration target area, the primary advantageous exploration target area shall be determined as a secondary Class 1 advantageous exploration target area; If there is a lens-shaped sand body in the prospecting target layer within the primary advantageous exploration target area, the primary advantageous exploration target area will be determined as a secondary Class 2 advantageous exploration target area.

[0046] For example, for the first-level advantageous exploration target areas that have been determined previously: a1-type advantageous exploration target area, a2-type advantageous exploration target area, b1-type advantageous exploration target area, b2-type advantageous exploration target area, b3-type advantageous exploration target area, c1-type advantageous exploration target area, and c2-type advantageous exploration target area, the above method can be used to determine the following second-level advantageous exploration target areas: If there is a sheet-like sand body in the prospecting target layer of the a1-type advantageous exploration target area, the a1-type advantageous exploration target area will be further determined as the a11-type advantageous exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the a1-type advantageous exploration target area, the a1-type advantageous exploration target area will be further determined as the a12-type advantageous exploration target area; If there is a sheet-like sand body in the prospecting target layer of the a2-type advantageous exploration target area, the a2-type advantageous exploration target area will be further determined as the a21-type advantageous exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the a2-type advantageous exploration target area, the a2-type advantageous exploration target area will be further determined as the a22-type advantageous exploration target area; If there is a sheet-like sand body in the prospecting target layer of the b1-type advantageous exploration target area, the b1-type advantageous exploration target area will be further determined as the b11-type advantageous exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the b1-type advantageous exploration target area, the b1-type advantageous exploration target area will be further determined as the b12-type advantageous exploration target area; If there is a sheet-like sand body in the prospecting target layer of the b2 type advantageous exploration target area, the b2 type advantageous exploration target area will be further determined as a b21 type advantageous exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the b2-type advantageous exploration target area, the b2-type advantageous exploration target area will be further determined as the b22-type advantageous exploration target area; If there is a sheet-like sand body in the prospecting target layer of the b3 type advantageous exploration target area, the b3 type advantageous exploration target area will be further determined as the b31 type advantageous exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the b3 type advantageous exploration target area, the b3 type advantageous exploration target area will be further determined as the b32 type advantageous exploration target area; If there is a sheet-like sand body in the prospecting target layer of the c1 type advantageous exploration target area, the c1 type advantageous exploration target area will be further determined as the c11 type advantageous exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the c1 type advantageous exploration target area, the c1 type advantageous exploration target area will be further determined as the c12 type advantageous exploration target area; If there is a sheet-like sand body in the prospecting target layer of the C2 type advantageous exploration target area, the C2 type advantageous exploration target area will be further determined as the C21 type advantageous exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the C2 type advantageous exploration target area, the C2 type advantageous exploration target area will be further determined as the C22 type advantageous exploration target area.

[0047] In this embodiment, it is determined based on seismic data whether the uplift in the secondary exploration target area causes folding of the target layer for prospecting and whether the fault penetrates the target layer for prospecting, and the type of the tertiary exploration target area is determined based on the judgment result.

[0048] Specifically, it includes: judging whether the uplift in the secondary advantageous exploration target area causes folding of the target layer for prospecting and whether the fault penetrates the target layer for prospecting based on the seismic data; and determining the tertiary advantageous exploration target area based on the judgment results.

[0049] The location where folds appear in the target layer of ore prospecting can guide the flow of uranium-containing and oxygen-containing fluids, which is beneficial to uranium mineralization; faults penetrate into the ore-bearing layer, which can communicate deep oil and gas and provide organic matter for uranium mineralization, which is beneficial to uranium mineralization. Therefore, seismic data can be used to determine whether the uplift causes folds in the target layer of ore prospecting and whether the fault penetrates into the target layer of ore prospecting, so as to further divide the types of exploration target areas.

[0050] Specifically, the types of the third-level advantageous exploration target areas are further determined according to the following methods: If the bulge in the secondary advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the secondary advantageous exploration target area shall be determined as a third-level type 1 advantageous exploration target area; If the uplift in the secondary advantageous exploration target area does not cause folding in the target layer for prospecting but the fault penetrates into the target layer for prospecting, or the uplift causes stratum folding but the fault does not penetrate into the target layer for prospecting, then the secondary advantageous exploration target area shall be determined as a third-level Class 2 advantageous exploration target area.

[0051] For example, for the previously determined secondary advantageous exploration target area, the above method can be used to determine the following tertiary advantageous exploration target areas: If the uplift of the a11-type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the a11-type advantageous exploration target area will be further determined as the a111-type advantageous exploration target area; If the uplift in the a11-type advantageous exploration target area does not cause folds in the target layer for prospecting but the faults penetrate into the target layer for prospecting, or the uplift causes stratum folds but the faults do not penetrate into the target layer for prospecting, then the a11-type advantageous exploration target area will be further determined as the a112-type advantageous exploration target area; If the uplift of the a12-type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the a12-type advantageous exploration target area will be further determined as the a121-type advantageous exploration target area; If the uplift in the a12 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, then the a12 type advantageous exploration target area will be further determined as the a122 type advantageous exploration target area; If the bulge of the a21-type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the a21-type advantageous exploration target area will be further determined as the a211-type advantageous exploration target area; If the uplift in the a21 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, then the a21 type advantageous exploration target area will be further determined as the a212 type advantageous exploration target area; If the bulge of the a22 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the a22 type advantageous exploration target area will be further determined as the a221 type advantageous exploration target area; If the uplift in the a22 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, then the a22 type advantageous exploration target area will be further determined as the a222 type advantageous exploration target area; If the uplift of the b11-type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the b11-type advantageous exploration target area will be further determined as the b111-type advantageous exploration target area; If the uplift in the b11 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the b11 type advantageous exploration target area will be further determined as a b112 type advantageous exploration target area; If the uplift of the b12 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the b12 type advantageous exploration target area will be further determined as the b121 type advantageous exploration target area; If the uplift in the B12 type advantageous exploration target area does not cause folds in the target layer for prospecting but the faults penetrate into the target layer for prospecting, or the uplift causes stratum folds but the faults do not penetrate into the target layer for prospecting, then the B12 type advantageous exploration target area will be further determined as the B122 type advantageous exploration target area; If the uplift of the B21 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the B21 type advantageous exploration target area will be further determined as the B211 type advantageous exploration target area; If the uplift in the B21 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, then the B21 type advantageous exploration target area will be further determined as the B212 type advantageous exploration target area; If the uplift of the B22 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the B22 type advantageous exploration target area will be further determined as the B221 type advantageous exploration target area; If the uplift in the B22 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, then the B22 type advantageous exploration target area will be further determined as the B222 type advantageous exploration target area; If the uplift of the B31 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the B31 type advantageous exploration target area will be further determined as the B311 type advantageous exploration target area; If the uplift in the B31 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the B31 type advantageous exploration target area will be further determined as the B312 type advantageous exploration target area; If the uplift of the B32 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the B32 type advantageous exploration target area will be further determined as the B321 type advantageous exploration target area; If the uplift in the B32 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the B32 type advantageous exploration target area will be further determined as the B322 type advantageous exploration target area; If the uplift of the C11 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the C11 type advantageous exploration target area will be further determined as the C111 type advantageous exploration target area; If the uplift in the C11 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the C11 type advantageous exploration target area will be further determined as the C112 type advantageous exploration target area; If the uplift of the C12 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the C12 type advantageous exploration target area will be further determined as the C121 type advantageous exploration target area; If the uplift in the C12 type advantageous exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the C12 type advantageous exploration target area will be further determined as the C122 type advantageous exploration target area; If the uplift of the C21 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the C21 type advantageous exploration target area will be further determined as the C211 type advantageous exploration target area; If the uplift in the C21 type advantageous exploration target area does not cause folds in the target layer for prospecting but the faults penetrate into the target layer for prospecting, or the uplift causes stratum folds but the faults do not penetrate into the target layer for prospecting, then the C21 type advantageous exploration target area will be further determined as the C212 type advantageous exploration target area; If the uplift of the C22 type advantageous exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the C22 type advantageous exploration target area shall be determined as the C221 type advantageous exploration target area; If the uplift in the C22 type advantageous exploration target area does not cause folding in the prospecting target layer but the fault penetrates into the prospecting target layer, or the uplift causes stratum folding but the fault does not penetrate into the prospecting target layer, the C22 type advantageous exploration target area shall be determined as the C222 type advantageous exploration target area. Embodiment 3

[0052] In this embodiment, if the favorable metallogenic structural unit is a good favorable metallogenic structural unit, then: Seismic data and gravity data are used to invert and reveal the development of faults and local uplifts in favorable mineralization structural units. Based on the development of the faults and local uplifts, the type of first-level good exploration target area is determined.

[0053] Specifically, if the fault and the local bulge 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, the favorable mineralization structural unit is determined to be a good exploration target area of ​​Class A; If the fault and the local bulge are located between the long axis of the anticline and the boundary of the first structural unit and close to the long axis of the anticline, the favorable mineralization structural unit is determined to be a good exploration target area of ​​type B; If the fault and the local uplift are located in structural unit B and close to the boundary of the first structural unit, the favorable mineralization structural unit is determined to be a good exploration target area of ​​Class C.

[0054] In one embodiment, it is identified based on seismic data whether sheet-like sand bodies or lens-like sand bodies exist in the prospecting target layer within the primary exploration target area, and the type of the secondary exploration target area is determined based on the identification result.

[0055] Specifically, it includes: identifying whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layer within the first-level good exploration target area based on seismic data, and determining the type of the second-level good exploration target area based on the identification results.

[0056] Tectonic unit A is a large anticline, and uranium-containing oxygen-containing fluids penetrate into the strata through the core of the anticline. If the sand content of the anticline core and the surrounding prospecting target layer is high, it is conducive to the continuous infiltration of uranium-containing oxygen-containing water on the surface, which is beneficial to uranium mineralization. Therefore, it is possible to identify whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layer within the first-level good exploration target area based on seismic data, and further determine the type of the second-level good exploration target area based on the identification results.

[0057] Specifically, the type of secondary good exploration target area is further determined according to the following methods: If there is a sheet-like sand body in the prospecting target layer within the first-level good exploration target area, the first-level good exploration target area is determined as a second-level Class 1 good exploration target area; If there is a lens-shaped sand body in the prospecting target layer within the first-level good exploration target area, the first-level good exploration target area will be determined as a second-level Class 2 good exploration target area.

[0058] For example, for the first-level good exploration target areas that have been determined previously: Class A good exploration target areas, Class B good exploration target areas, Class C good exploration target areas, the above method can be used to determine the following second-level good exploration target areas: If there is a sheet-like sand body in the prospecting target layer of the type a good exploration target area, the type a good exploration target area will be further determined as the type a1 good exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the a-type good exploration target area, the a-type good exploration target area will be further determined as a2-type good exploration target area; If there is a sheet-like sand body in the prospecting target layer of the B-type good exploration target area, the B-type good exploration target area will be further determined as the B1-type good exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the B-type good exploration target area, the B-type good exploration target area will be further determined as the B2-type good exploration target area; If there is a sheet sand body in the prospecting target layer of the Class C good exploration target area, the Class C good exploration target area will be further determined as a Class C1 good exploration target area.

[0059] If there are lens-shaped sand bodies in the prospecting target layer of the Class C good exploration target area, the Class C good exploration target area will be further determined as the Class C2 good exploration target area.

[0060] In one embodiment, it is determined based on seismic data whether the uplift in the secondary exploration target area causes folding of the target layer for prospecting and whether the fault penetrates the target layer for prospecting, and the type of the tertiary exploration target area is determined based on the determination result.

[0061] Specifically, it includes: judging whether the uplift in the secondary good exploration target area causes folds in the prospecting target layer and whether the fault penetrates the prospecting target layer based on the seismic data; and determining the tertiary good exploration target area based on the judgment results.

[0062] Specifically, the three-level good exploration target area types are further determined according to the following methods: If the bulge in the secondary good exploration target area causes folds in the prospecting target layer and the fault penetrates the prospecting target layer, the secondary good exploration target area is determined as a third-level Class 1 good exploration target area; If the uplift in the secondary good exploration target area does not cause folding in the target layer for prospecting but the fault penetrates into the target layer for prospecting, or the uplift causes stratum folding but the fault does not penetrate into the target layer for prospecting, then the secondary good exploration target area shall be determined as a tertiary Class 2 good exploration target area.

[0063] For example, for the previously determined secondary good exploration target area, the above method can be used to determine the following tertiary good exploration target area: If the bulge of the a1-type good exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the a1-type good exploration target area will be further determined as the a11-type good exploration target area; If the uplift in the a1-type good exploration target area does not cause folds in the target layer for prospecting but the faults penetrate into the target layer for prospecting, or the uplift causes stratum folds but the faults do not penetrate into the target layer for prospecting, then the a1-type good exploration target area will be further determined as the a12-type good exploration target area; If the bulge of the a2-type good exploration target area causes folds in the prospecting target layer and the fault penetrates the prospecting target layer, the a2-type good exploration target area will be further determined as the a21-type good exploration target area; If the uplift in the a2-type good exploration target area does not cause folds in the target layer for prospecting but the faults penetrate into the target layer for prospecting, or the uplift causes stratum folds but the faults do not penetrate into the target layer for prospecting, then the a2-type good exploration target area will be further determined as the a22-type good exploration target area; If the uplift of the b1 type good exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the b1 type good exploration target area will be further determined as a b11 type good exploration target area; If the uplift in the b1 type good exploration target area does not cause folds in the target layer for prospecting but the faults penetrate into the target layer for prospecting, or the uplift causes stratum folds but the faults do not penetrate into the target layer for prospecting, then the b1 type good exploration target area will be further determined as a b12 type good exploration target area; If the uplift of the b2 type good exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the b2 type good exploration target area will be further determined as a b21 type good exploration target area; If the uplift in the b2 type good exploration target area does not cause folds in the target layer for prospecting but the faults penetrate into the target layer for prospecting, or the uplift causes stratum folds but the faults do not penetrate into the target layer for prospecting, then the b2 type good exploration target area will be further determined as a b22 type good exploration target area; If the uplift of the C1 type good exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the C1 type good exploration target area will be further determined as the C11 type good exploration target area; If the uplift in the C1 type good exploration target area does not cause folds in the target layer for prospecting but the faults penetrate into the target layer for prospecting, or the uplift causes stratum folds but the faults do not penetrate into the target layer for prospecting, then the C1 type good exploration target area will be further determined as the C12 type good exploration target area; If the bulge of the C2 type good exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the C2 type good exploration target area will be further determined as a C21 type good exploration target area; If the uplift in the C2 good exploration target area does not cause folding in the target layer for prospecting but the fault penetrates into the target layer for prospecting, or the uplift causes stratum folding but the fault does not penetrate into the target layer for prospecting, then the C2 good exploration target area will be further determined as a C22 good exploration target area. Embodiment 4

[0064] In this embodiment, if the favorable metallogenic structural unit is a potentially favorable metallogenic structural unit, then: Seismic data and gravity data are used to invert and reveal the development of basement faults and local uplifts in tectonic unit B within a range of 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 in tectonic unit A globally. Based on the development of basement faults and local uplifts in tectonic unit B within a range of 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 in tectonic unit A globally, the type of primary potential exploration target area is determined.

[0065] Specifically, when the base of structural unit A with a smaller base burial depth is a slope terrain, and both structural unit A and structural unit B are potentially favorable mineralization structural units: If the basement fault and the local bulge are located in structural unit A and close to the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a potential exploration target area of ​​type A; If the basement fault and the local uplift are located in structural unit B within a range of less than or equal to 10 km from the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a potential exploration target area of ​​type B; If the basement fault and local uplift are located in structural unit B within 10-30 km from the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a Class C potential exploration target area; wherein the range of 10-30 km is greater than 10 km and less than or equal to 30 km.

[0066] When the basement burial depth of structural unit A is uniform, and the basement burial depth of structural unit B is large, it is a potential favorable mineralization structural unit: If the basement fault and the local uplift are located near both sides of the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a Class D potential exploration target area.

[0067] In one embodiment, it is identified based on seismic data whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layer within the primary exploration target area, and the type of the secondary exploration target area is determined based on the identification result.

[0068] Specifically, it includes: identifying whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layer within the first-level potential exploration target area based on seismic data, and determining the type of the second-level potential exploration target area based on the identification results.

[0069] For potentially favorable mineralization tectonic units, such as Figure 4 As shown in the figure, tectonic unit A is a slope terrain, and uranium-containing oxygen-containing fluids migrate along the slope terrain to the low-lying areas. Similarly, if the sand content of tectonic unit A and the surrounding prospecting target layers is high, it is conducive to the continuous infiltration of uranium-containing oxygen-containing water on the surface, which is beneficial to uranium mineralization. Therefore, it is possible to identify whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layers within the first-level potential exploration target area based on seismic data, and further determine the type of the second-level potential exploration target area based on the identification results.

[0070] Specifically, the type of secondary potential exploration target area is further determined according to the following methods: If there is a sheet-like sand body in the prospecting target layer within the first-level potential exploration target area, the first-level potential exploration target area shall be determined as a second-level Class 1 potential exploration target area; If there is a lens-shaped sand body in the prospecting target layer within the first-level potential exploration target area, the first-level potential exploration target area will be determined as a second-level Class 2 potential exploration target area.

[0071] For example, for the first-level potential exploration target areas that have been determined previously: Class A potential exploration target areas, Class B potential exploration target areas, Class C potential exploration target areas, and Class D potential exploration target areas, the above method can be used to determine the following second-level potential exploration target areas: If there is a sheet-like sand body in the prospecting target layer of the Class A potential exploration target area, the Class A potential exploration target area will be further determined as the Class A1 potential exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the type A potential exploration target area, the type A potential exploration target area will be further determined as the type A2 potential exploration target area; If there is a sheet-like sand body in the prospecting target layer of the Class B potential exploration target area, the Class B potential exploration target area will be further determined as the Class B1 potential exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the B-type potential exploration target area, the B-type potential exploration target area will be further determined as the B2-type potential exploration target area; If there is a sheet-like sand body in the prospecting target layer of the C-type potential exploration target area, the C-type potential exploration target area will be further determined as the C1-type potential exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the C-type potential exploration target area, the C-type potential exploration target area will be further determined as the C2-type potential exploration target area; If there is a sheet-like sand body in the prospecting target layer of the D-type potential exploration target area, the D-type potential exploration target area will be further determined as the D1-type potential exploration target area; If there are lens-shaped sand bodies in the prospecting target layer of the Class D potential exploration target area, the Class D potential exploration target area will be further determined as a Class D2 potential exploration target area.

[0072] In one embodiment, it is determined based on seismic data whether the uplift in the secondary exploration target area causes folding of the target layer for prospecting and whether the fault penetrates the target layer for prospecting, and the type of the tertiary exploration target area is determined based on the determination result.

[0073] Specifically, it includes: judging whether the uplift in the secondary potential exploration target area causes folding of the target layer for prospecting and whether the fault penetrates the target layer for prospecting based on the seismic data; and determining the tertiary potential exploration target area based on the judgment results.

[0074] Specifically, the types of third-level potential exploration targets are further determined according to the following methods: If the bulge in the secondary potential exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the secondary potential exploration target area shall be determined as a third-level Class 1 potential exploration target area; If the uplift in the secondary potential exploration target area does not cause folding in the target layer for prospecting but the fault penetrates into the target layer for prospecting, or the uplift causes stratum folding but the fault does not penetrate into the target layer for prospecting, then the secondary potential exploration target area shall be determined as a third-level Class 2 potential exploration target area.

[0075] For example, for the previously determined secondary potential exploration target area, the above method can be used to determine the following tertiary potential exploration target areas: If the uplift of the a1 potential exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the a1 potential exploration target area will be further determined as the a11 potential exploration target area; If the uplift in the a1 potential exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the a1 potential exploration target area will be further determined as a12 potential exploration target area; If the uplift of the a2 potential exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the a2 potential exploration target area will be further determined as the a21 potential exploration target area; If the uplift in the a2 potential exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the a2 potential exploration target area will be further determined as a22 potential exploration target area; If the uplift of the B1 potential exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the B1 potential exploration target area will be further determined as the B11 potential exploration target area; If the uplift in the B1 potential exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the B1 potential exploration target area will be further determined as a B12 potential exploration target area; If the uplift of the B2 potential exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the B2 potential exploration target area will be further determined as the B21 potential exploration target area; If the uplift in the B2 potential exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the B2 potential exploration target area will be further determined as a B22 potential exploration target area; If the uplift of the C1 potential exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the C1 potential exploration target area will be further determined as the C11 potential exploration target area; If the uplift in the C1 potential exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the C1 potential exploration target area will be further determined as a C12 potential exploration target area; If the uplift of the C2 potential exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the C2 potential exploration target area will be further determined as a C21 potential exploration target area; If the uplift in the C2 potential exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the C2 potential exploration target area will be further determined as a C22 potential exploration target area; If the bulge of the D1 potential exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the D1 potential exploration target area will be further determined as the D11 potential exploration target area; If the bulge in the D1 potential exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the bulge causes stratum folds but the faults do not penetrate into the prospecting target layer, the D1 potential exploration target area will be further determined as a D12 potential exploration target area; If the bulge of the D2 potential exploration target area causes folding of the prospecting target layer and the fault penetrates the prospecting target layer, the D2 potential exploration target area will be further determined as the D21 potential exploration target area; If the uplift in the D2 potential exploration target area does not cause folds in the prospecting target layer but the faults penetrate into the prospecting target layer, or the uplift causes stratum folds but the faults do not penetrate into the prospecting target layer, the D2 potential exploration target area will be further determined as a D22 potential exploration target area.

[0076] This application obtains geological data of sedimentary basins, and determines favorable mineralization structural units according to the spatial distribution, structural and stratigraphic characteristics of secondary and tertiary structural units in sedimentary basins; for various mineralization structural units, the uplifts and faults at the boundaries of structural units are used as important signs for prospecting, and the spatial distribution laws of uplifts (depressions, local bulges) and faults at the boundaries of structural units, and / or the characteristics of Bouguer gravity anomaly contour lines in the region are analyzed in combination with geological and geophysical prospecting methods to delineate primary advantageous exploration targets, primary good exploration targets and primary potential exploration targets. It can not only accurately lock the preferred targets in the sandstone-type uranium exploration area, but also significantly reduce the blindness in the prospecting process and improve the exploration efficiency. On this basis, the type of secondary advantageous exploration target is determined by further identifying whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layer in the primary advantageous exploration target area according to seismic data; whether the uplifts in the secondary advantageous exploration target area cause folds in the prospecting target layer and whether the faults penetrate into the prospecting target layer according to the seismic data, and the tertiary advantageous exploration target area is determined according to the judgment results. Thereby further accurately hitting the sandstone-type uranium exploration target area and improving the accuracy and efficiency of prospecting. In summary, based on an in-depth analysis of the uranium mineralization characteristics controlled by the tectonic unit boundaries, this application proposes to use 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 method of prospecting that is efficient and low-cost. This method can not only accurately lock the preferred targets in the sandstone-type uranium exploration area, but also significantly reduce the blindness in the prospecting process and improve exploration efficiency.

[0077] In the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0078] The above is only a specific implementation of the present application. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A sandstone-type uranium ore prospecting method based on tectonic unit boundaries, characterized in that: The method comprises: Obtain geological data of the sedimentary basin, determine the spatial distribution, structural and stratigraphic characteristics of the tectonic units in the sedimentary basin, and determine the type of favorable mineralization tectonic units based on the spatial distribution, structural and stratigraphic characteristics of the tectonic units; For different types of favorable mineralization structural units, the primary exploration target areas of sandstone-type uranium deposits are determined in combination with the gravity data and / or seismic data and / or oil and gas conditions of the favorable mineralization structural units. 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.

2. The method according to claim 1, characterized in that The method of obtaining geological data of a sedimentary basin, determining the spatial distribution, structural and stratigraphic characteristics of the structural units in the sedimentary basin, and determining the type of favorable mineralization structural units according to the spatial distribution, structural and stratigraphic characteristics of the structural units, includes: If tectonic unit B is adjacent to tectonic unit A where bedrock is exposed, then tectonic unit B is determined to be a dominant and favorable mineralization tectonic unit; If structural unit A is a large anticline, structural unit A and its adjacent structural unit B are considered to be favorable mineralization structural units; When the prospecting target layers of adjacent tectonic units A and B are both covered by sedimentary layers, but there are differences in the burial depth of their bases, if the base of tectonic unit A with a smaller burial depth is a slope terrain, then both tectonic units A and B are potentially favorable metallogenic tectonic units; if the base of tectonic unit A with a smaller burial depth is uniform, then tectonic unit B with a larger burial depth is a potentially favorable metallogenic tectonic unit; The boundary of the structural unit B close to the structural unit A is recorded as the first structural unit boundary, and the boundary of the structural unit B far from the structural unit A is recorded as the second structural unit boundary.

3. The method according to claim 2, characterized in that For different types of favorable mineralization structural units, combined with the gravity data and / or seismic data and / or oil and gas conditions of the favorable mineralization structural units, the primary exploration target areas of sandstone-type uranium deposits are determined. 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, including: If the favorable metallogenic structural unit is the dominant favorable metallogenic structural unit, then: Analyze the reduction strength of the prospecting target layer of tectonic unit B and determine the type of the prospecting target layer of tectonic unit B; Taking tectonic unit A as the erosion source area, according to different types of prospecting target layers, tectonic unit B is divided into different types of prospecting prospecting areas with the boundary of the first tectonic unit as the starting point; Based on the gravity data and / or seismic data and / or oil and gas content of the prospecting area, the type of primary advantageous exploration target area is determined.

4. The method according to claim 3, characterized in that The analyzing the reducing strength of the prospecting target layer of the structural unit B and determining the type of the prospecting target layer of the structural unit B comprises: If the prospecting target layer of tectonic unit B is a coal-bearing stratum or the prospecting target layer was formed in a warm and humid paleoclimate environment, then the prospecting target layer of tectonic unit B is determined to be a type of reduction intensity prospecting target layer; If the prospecting target layer of tectonic unit B was formed in the paleoclimate environment of warm-humid-arid transition, then the prospecting target layer of tectonic unit B is determined to be the second type of reduction intensity prospecting target layer; If the prospecting target layer of tectonic unit B was formed in a dry and hot paleoclimate environment, then the prospecting target layer of tectonic unit B is determined to be a third-class reduction intensity prospecting target layer.

5. The method according to claim 4, characterized in that The structural unit A is taken as the erosion source area, and the structural unit B is divided into different types of prospecting prospecting areas according to different types of prospecting target layers, starting from the boundary of the first structural unit, including: If the prospecting target layer of tectonic unit B is a type I reduction intensity prospecting target layer, then the tectonic unit B within a range of 30 km or less from the boundary of the first tectonic unit is divided into a type A prospecting prospecting area; If the prospecting target layer of tectonic unit B is a type II reduction intensity prospecting target layer, then the tectonic unit B within 30-100km from the boundary of the first tectonic unit is divided into a type B prospecting prospecting area; If the prospecting target layer of tectonic unit B is a Class III reduction intensity prospecting target layer, then the tectonic unit B within 100-250km from the boundary of the first tectonic unit is divided into a Class C prospecting prospecting area.

6. The method according to claim 5, characterized in that The determination of the type of primary advantageous exploration target area by combining the gravity data and / or seismic data and / or oil and gas content of the prospecting area includes: For the prospecting areas of type A and type B, the gravity data in the prospecting areas are processed and inverted to obtain structural maps including basement undulation and spatial distribution of faults and contour maps of Bouguer gravity field, analyze the spatial distribution of different structures in the area, and determine the type of primary advantageous exploration target area based on the spatial distribution of different structures; For Class C prospecting areas, the oil and gas content of the area through which the uranium-containing oxygen-containing water flows is searched along the flow direction of the uranium-containing oxygen-containing water. The type of primary advantageous exploration target area is determined based on the oil and gas content of the area through which the uranium-containing oxygen-containing water flows.

7. The method according to claim 6, characterized in that For the A-type prospecting area and the B-type prospecting area, the gravity data in the prospecting area is processed and inverted to obtain structural maps including the basement undulation and the spatial distribution of the fault and the Bouguer gravity field contour map, analyze the spatial distribution law of different structures in the area, and determine the type of primary advantageous exploration target area according to the spatial distribution law of the different structures, including: For the type A prospecting area, the gravity data in the type A prospecting area are processed and inverted to obtain structural maps including the basement undulation and the spatial distribution of faults and the contour map of the Bouguer gravity field, and to analyze the spatial distribution of uplifts and faults in the area; If multiple uplifts and faults appear in groups in Area 1, and the contour lines of Bouguer gravity anomaly field in Area 1 are seriously distorted, then the Area 1 is classified as a Class A1 superior exploration target area; If there is a single uplift and fault in Area 2, and the contour lines of the Bouguer gravity anomaly field in Area 2 are distorted in the same direction, then Area 2 is classified as a type A2 advantageous exploration target area; For the B-type prospecting areas, the gravity data in the B-type prospecting areas are processed and inverted to obtain structural maps including the basement undulation and the spatial distribution of faults and the Bouguer gravity field contour map, and analyze the spatial distribution of depressions and faults in the area; If the area is larger than 20km 2 If there is a large depression, and the contour lines of the Bouguer gravity anomaly field at the edge of the large depression are seriously distorted, the edge of the large depression is classified as a B1 type advantageous exploration target area; If the area is greater than or equal to 5km 2 And less than or equal to 20km 2 If there is a medium-sized depression, and the Bouguer gravity anomaly field contour lines at the edge of the medium-sized depression are distorted in the same direction, the edge of the medium-sized depression is classified as a b2 type advantageous exploration target area; If the area is less than 5km 2 If a small depression is found and the contour lines of the Bouguer gravity anomaly field at the edge of the small depression are distorted in the same direction, the edge of the small depression is classified as a b3 type advantageous exploration target area.

8. The method according to claim 6, characterized in that For the C-type prospecting prospecting area, the oil and gas content of the area where the uranium-containing oxygen-containing water flows is found along the flow direction of the uranium-containing oxygen-containing water, and the type of primary advantageous exploration target area is determined according to the oil and gas content of the area where the uranium-containing oxygen-containing water flows, including: If there are oil and gas enriched structural units in the area where uranium-containing and oxygen-containing water flows, the non-oil and gas enriched structural units in the Class C prospecting prospecting area shall be divided into Class C1 advantageous exploration target areas, and the oil and gas enriched structural units in the Class C prospecting prospecting area shall be divided into Class C2 advantageous exploration target areas.

9. The method according to claim 2, characterized in that: For different types of favorable mineralization structural units, the primary exploration target area of ​​sandstone-type uranium deposits is determined in combination with gravity data and / or seismic data and / or oil and gas conditions of the favorable mineralization structural units. The primary exploration target area includes a primary advantageous exploration target area and / or a primary good exploration target area and / or a primary potential exploration target area, and also includes: If the favorable mineralization structural unit is a good favorable mineralization structural unit, then: Seismic data and gravity data are used to invert and reveal the development of faults and local uplifts in favorable mineralization structural units. Based on the development of the faults and local uplifts, the type of first-level good exploration target area is determined.

10. The method according to claim 9, characterized in that The use of seismic data and gravity data to invert and reveal the development of faults and local uplifts in favorable mineralization structural units, and determine the type of first-level good exploration target areas based on the development of the faults and local uplifts, including: If the fault and the local bulge 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, the favorable mineralization structural unit is determined to be a good exploration target area of ​​Class A; If the fault and the local bulge are located between the long axis of the anticline and the boundary of the first structural unit and close to the long axis of the anticline, the favorable mineralization structural unit is determined to be a good exploration target area of ​​type B; If the fault and the local uplift are located in structural unit B and close to the boundary of the first structural unit, the favorable mineralization structural unit is determined to be a good exploration target area of ​​Class C.

11. The method according to claim 2, characterized in that For different types of favorable mineralization structural units, the primary exploration target area of ​​sandstone-type uranium deposits is determined in combination with gravity data and / or seismic data and / or oil and gas conditions of the favorable mineralization structural units. The primary exploration target area includes a primary advantageous exploration target area and / or a primary good exploration target area and / or a primary potential exploration target area, and also includes: If the favorable metallogenic structural unit is a potentially favorable metallogenic structural unit, then: Seismic data and gravity data are used to invert and reveal the development of basement faults and local uplifts in tectonic unit B within a range of 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 in tectonic unit A globally. Based on the development of basement faults and local uplifts in tectonic unit B within a range of 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 in tectonic unit A globally, the type of primary potential exploration target area is determined.

12. The method according to claim 11, characterized in that The inversion of seismic data and gravity data to reveal the development of basement faults and local bulges of tectonic unit B within a range of 30 km or less from the boundary of the first tectonic unit, as well as the development of basement faults and local bulges of tectonic unit A, and the determination of the type of primary potential exploration target area based on the development of basement faults and local bulges of tectonic unit B within a range of 30 km or less from the boundary of the first tectonic unit, as well as the development of basement faults and local bulges of tectonic unit A, include: When the base of structural unit A with a smaller base burial depth is a slope terrain, and both structural unit A and structural unit B are potentially favorable mineralization structural units: If the basement fault and the local bulge are located in structural unit A and close to the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a potential exploration target area of ​​type A; If the basement fault and the local uplift are located in structural unit B within a range of less than or equal to 10 km from the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a potential exploration target area of ​​type B; If the basement fault and the local uplift are located in the structural unit B within 10-30 km from the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a potential exploration target area of ​​type C; When the base burial depth of structural unit A is uniform, and the base burial depth of structural unit B is large, it is a potential favorable mineralization structural unit: If the basement fault and the local uplift are located near both sides of the boundary of the first structural unit, the potentially favorable mineralization structural unit is determined to be a Class D potential exploration target area.

13. The method according to any one of claims 1 to 12, characterized in that: Also includes: Based on the seismic data, it is identified whether there are sheet-like sand bodies or lens-like sand bodies in the prospecting target layer within the primary exploration target area, and the type of secondary exploration target area is determined based on the identification results.

14. The method according to claim 13, characterized in that The method of identifying whether there is a sheet-like sand body or a lenticular sand body in the prospecting target layer within the primary exploration target area according to the seismic data, and determining the type of the secondary exploration target area according to the identification result, includes: If there is a sheet-like sand body in the prospecting target layer within the primary exploration target area, the primary exploration target area shall be determined as a secondary type 1 exploration target area; If there is a lens-shaped sand body in the prospecting target layer within the primary exploration target area, the primary exploration target area will be determined as a secondary Class 2 exploration target area.

15. The method according to claim 13, characterized in that Based on the seismic data, it is determined whether the uplift in the secondary exploration target area causes folds in the target layer for prospecting and whether the fault penetrates the target layer for prospecting. Based on the judgment results, the type of the tertiary exploration target area is determined.

16. The method according to claim 15, characterized in that According to the seismic data, it is judged whether the uplift in the secondary exploration target area causes folds in the target layer of ore prospecting and whether the fault penetrates the target layer of ore prospecting. According to the judgment results, the type of the tertiary exploration target area is determined, including: If the bulge in the secondary exploration target area causes folding of the target layer for prospecting and the fault penetrates the target layer for prospecting, the secondary exploration target area shall be determined as a third-level Class 1 exploration target area; If the uplift in the secondary exploration target area does not cause folding in the target layer for prospecting but the fault penetrates into the target layer for prospecting, or the uplift causes stratum folding but the fault does not penetrate into the target layer for prospecting, then the secondary exploration target area shall be determined as a third-level Class 2 exploration target area.

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