Bauxite prospecting method and device

Abstract

The invention discloses a bauxite prospecting method and device, relates to the technical field of geological exploration, and aims to solve the problems of low exploration efficiency and high cost of a prospecting method in the prior art. The method comprises the following steps: acquiring target multi-source data of a target prospecting area; the target multi-source data at least comprises first geological background data, target remote sensing data and target gravity and magnetic satellite data; updating a wrinkle structure and a fracture structure in the first geological background data based on the first geological background data and the target remote sensing data to obtain second geological background data; based on the target remote sensing data, the second geological background data and the target gravity-magnetic satellite data, determining a target mineralization target area of the bauxite in the target prospecting area according to a mineralization control rule of the bauxite; performing mineralization condition verification on the target mineralization target area to obtain mineralization verification data; based on the metallogenic verification data, performing prospecting optimization on the metallogenic target area of the target prospecting area; the prospecting efficiency is improved, and the prospecting cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral exploration, and in particular to a bauxite prospecting method and device. Background Art

[0002] Traditional methods for evaluating mineral resources, such as geological, geophysical, and geochemical exploration methods, mainly rely on geological surveys, geophysical exploration, and geochemical exploration means. However, these methods are often costly, inefficient, and have great limitations. Moreover, traditional exploration means are relatively single, and affected by local natural geography, climate, traffic conditions and other limiting conditions, the exploration efficiency in the prior art can no longer meet the current demand for delineating exploration target areas in various regions; especially for bauxite with greater exploration difficulty, the exploration efficiency of traditional means can no longer meet the industry's needs.

[0003] Based on this, in order to prospect the resource endowment of bauxite, it is urgent to design a new geological exploration method to improve the exploration efficiency of bauxite while reducing the exploration cost, so as to solve the problems of high exploration cost and low efficiency of the existing prospecting methods. Summary of the Invention

[0004] The purpose of the present invention is to provide a bauxite prospecting method and device, which combines geological, geophysical, geochemical, and remote sensing exploration methods to comprehensively explore and optimize the bauxite prospecting target area, improve the accuracy and prospecting efficiency of delineating the prospecting target area, and reduce the exploration cost; solve the problems of high exploration cost and low efficiency of the existing prospecting methods.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions: In the first aspect, the present invention provides a bauxite prospecting method, which may include: Obtaining target multi-source data of a target prospecting area; the target multi-source data at least includes first geological background data, target remote sensing data, and target gravity and magnetic satellite data; Based on the first geological background data and the target remote sensing data, updating the fold structure and fault structure in the first geological background data to obtain second geological background data; Based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data, determining the target ore-forming target area of bauxite in the target prospecting area according to the ore-forming and ore-controlling rules of bauxite; Verifying the ore-forming conditions of the target ore-forming target area to obtain ore-forming verification data; Based on the ore-forming verification data, optimizing the ore-forming target area of the target prospecting area.

[0006] Preferably, before obtaining the target multi-source data of the target prospecting area, it may include: Obtain the basic multi-source data of the target prospecting area; the basic multi-source data at least includes the basic geological background data, basic remote sensing data, and basic gravity and magnetic satellite data of the target prospecting area; Perform data preprocessing on the basic multi-source data to obtain the target multi-source data; The performing data preprocessing on the basic multi-source data to obtain the target multi-source data includes: Perform data processing on the basic geological background data of the target prospecting area to obtain the target geological background data of the geology at a preset ratio; extract the geological background data from the target geological background data to obtain the first geological background data, and the preset ratio at least includes 1:200,000; the first geological background data at least includes the strata, lithology, folds, faults, alteration types, and paleogeographic lithofacies characteristics of the target prospecting area; Perform remote sensing data processing on the basic remote sensing data to obtain the target remote sensing data; the target remote sensing data at least includes Al-OH mineral data, Mg-OH mineral data, and ferric oxide alteration anomaly data; Perform gravity and magnetic data preprocessing on the basic gravity and magnetic satellite data to obtain the target gravity and magnetic satellite data; the target gravity and magnetic satellite data at least includes the Bouguer gravity anomaly information, aeromagnetic reduction to the pole anomaly information, and residual Bouguer gravity anomaly information of the target prospecting area.

[0007] Preferably, the performing remote sensing data processing on the basic remote sensing data to obtain the target remote sensing data may include: Perform data correction on the basic remote sensing data to obtain intermediate remote sensing data; the data correction at least includes radiometric calibration, atmospheric correction, or geometric correction; Extract the mineral data from the intermediate remote sensing data to obtain target mineral data; the target mineral data at least includes the Al-OH mineral data and the Mg-OH mineral data; Based on the intermediate remote sensing data, construct a ferric oxide alteration principal component transformation feature matrix; Confirm the band data in the ferric oxide alteration principal component transformation feature matrix that meets the preset conditions as the ferric oxide alteration anomaly data; the preset conditions are that the coefficient of band1 and the coefficient of band4 have the same sign and are negative, and the coefficient of band3 and the coefficient of band5 have the same sign and are positive.

[0008] Preferably, the basic gravity and magnetic satellite data at least may include the gravity satellite data of a preset gravity satellite and the magnetic satellite data of a preset magnetic satellite; The performing gravity and magnetic data preprocessing on the basic gravity and magnetic satellite data to obtain the target gravity and magnetic satellite data may include: Preprocess the gravity satellite data of the preset gravity satellite to obtain the vertical first-order or second-order derivative map of the gravity satellite; the preprocessing of the gravity satellite data at least includes upward continuation of gravity anomaly and derivative operation, extraction of residual field gravity and magnetic data, and two-dimensional or three-dimensional derivative inversion calculation; Preprocess the magnetic satellite data of the preset magnetic satellite to obtain the vertical first-order or second-order derivative map of the magnetic satellite; the preprocessing of the magnetic satellite data at least includes processing and analysis of aeromagnetic reduction to the pole anomaly information, and two-dimensional or three-dimensional derivative inversion calculation; Based on the vertical first-order or second-order derivative map of the gravity satellite and the vertical first-order or second-order derivative map of the magnetic satellite, obtain the target gravity and magnetic satellite data.

[0009] Preferably, the determining of the fold structure and fault structure in the first geological background data based on the first geological background data and the target remote sensing data to obtain the second geological background data may include: Based on the stratigraphic information in the first geological background data and in combination with the target remote sensing data, establish stratigraphic interpretation marks; Based on the stratigraphic interpretation marks, extract intermediate fold structures; Use the intermediate fold structures to update the fold structures in the first geological background data to obtain target fold structures; Based on the geological map in the first geological background data and in combination with the target remote sensing data, establish fault interpretation marks; Based on the fault interpretation marks, extract intermediate fault structures; Use the intermediate fault structures to update the fault structures in the first geological background data to obtain target fault structures; After replacing the fold structures and fault structures in the first geological background data with the target fold structures and the target fault structures, obtain the second geological background data.

[0010] Preferably, before determining the target ore-forming target area of bauxite in the target ore prospecting area according to the ore-forming and ore-controlling rules of bauxite based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data, it may include: Determine the ore-forming and ore-controlling rules of bauxite; The ore-forming and ore-controlling rules of bauxite at least include ore-forming conditions, ore-controlling factors, and ore prospecting marks; The ore-forming conditions are used to represent the geographical environment conditions for the formation of bauxite; The ore-controlling factors are used to represent the controlling factors for the occurrence of bauxite; The prospecting criteria are used to represent the criterion information indicating the existence of bauxite, and the criterion information includes at least strata, provenance, fold structure, alteration information, and gravity and magnetic anomaly information.

[0011] Preferably, based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data, according to the ore-forming and ore-controlling rules of bauxite, determining the target ore-forming target area of bauxite in the target prospecting area may include: Overlay the mineral alteration image of Al-OH and the iron staining alteration anomaly image to obtain an overlaid alteration image; Mark the areas where the alteration anomaly information is enriched in the overlaid alteration image to obtain the target alteration anomaly information enrichment area; Extract from the second geological background data the areas where there are basalts of the Emeishan Formation of the Middle-Upper Permian, the bottom of the Xuanwei Formation of the Upper Permian, or the Liangshan Formation of the Middle Permian near the anticline and syncline to obtain the target geographical location area; Based on the target alteration anomaly information enrichment area, the target geographical location area, and the target gravity and magnetic satellite data, determine the target area with target mineralization factors in the target prospecting area; the target mineralization factors include at least known mineralization points, mineralization outcrops, and mineralization alterations; Take the target area as the target ore-forming target area of bauxite in the target prospecting area.

[0012] Preferably, the ore-forming verification of the target ore-forming target area to obtain ore-forming verification data may include: Obtain the detection data of multiple field sampling points and the geological data of multiple verification points; the detection data includes at least data of Al grade and / or aluminum-silicon ratio; the geological data includes at least alteration, lithology, strata, and structure information; the multiple field sampling points and the multiple verification points are the marked points in the target ore-forming target area; Take the detection data of the multiple field sampling points and the geological data of the multiple verification points as the ore-forming verification data.

[0013] Preferably, based on the ore-forming verification data, optimizing the ore-forming target area of the target prospecting area may include: Compare the ore-forming verification data with the remote sensing interpretation criteria to obtain a comparison result; If the comparison result indicates that the difference between the ore-forming verification data and the remote sensing interpretation criteria exceeds a preset threshold, then optimize the remote sensing interpretation criteria based on the ore-forming verification data until the difference between the finally obtained ore-forming verification data and the previously updated remote sensing interpretation criteria meets the preset threshold, and obtain the ore-forming target area of the target prospecting area.

[0014] Second aspect, the present invention provides a bauxite prospecting device, which may include: A data acquisition module, which is used to acquire target multi-source data of a target prospecting area; the target multi-source data at least includes first geological background data, target remote sensing data, and target gravity and magnetic satellite data; A data update module, which is used to determine the fold structure and fault structure in the first geological background data based on the first geological background data and the target remote sensing data, and obtain second geological background data; An ore-forming target area determination module, which is used to determine the target ore-forming target area of bauxite in the target prospecting area based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data according to the ore-forming and ore-controlling rules of bauxite; An ore-forming condition verification module, which is used to verify the ore-forming conditions of the target ore-forming target area to obtain ore-forming verification data; An optimization module, which is used to optimize the ore prospecting of the ore-forming target area of the target prospecting area based on the ore-forming verification data.

[0015] Compared with the prior art, a bauxite prospecting method provided by the present invention acquires target multi-source data of a target prospecting area; wherein, the target multi-source data at least includes first geological background data, target remote sensing data, and target gravity and magnetic satellite data; first, based on the first geological background data and the target remote sensing data, the fold structure and fault structure in the first geological background data are updated to obtain second geological background data; then, based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data, according to the ore-forming and ore-controlling rules of bauxite, the target ore-forming target area of bauxite in the target prospecting area is determined; further, the ore-forming conditions of the target ore-forming target area are verified to obtain ore-forming verification data; finally, based on the ore-forming verification data, the ore prospecting of the ore-forming target area of the target prospecting area is optimized; thereby realizing the use of geological background, remote sensing data, and gravity and magnetic satellite data, after combining geological, geophysical, and remote sensing means, comprehensively delineating the preliminary ore-forming target area of the target ore prospecting area, and optimizing the ore prospecting of the preliminarily delineated ore-forming target area in combination with the ore-forming verification data, without the need for excessive geophysical or geochemical exploration methods, reducing the exploration cost while improving the exploration efficiency; solving the problems of low exploration efficiency and high cost in the prior art's prospecting methods. Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1Schematic diagram of the main process of a bauxite prospecting method provided by the present invention; Figure 2 Schematic diagram of the results of remote sensing alteration anomalies in a bauxite prospecting method provided by the present invention; Figure 3 Schematic diagram of the results of remote sensing interpreted folds in a bauxite prospecting method provided by the present invention; Figure 4 Schematic diagram of the results of remote sensing interpreted strata in a bauxite prospecting method provided by the present invention; Figure 5 Schematic diagram of the results of the prospecting target area in a bauxite prospecting method provided by the present invention; Figure 6 Schematic diagram of the structure of a bauxite prospecting device provided by the present invention. Detailed implementation manners

[0017] In order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and roles. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and do not limit their chronological order. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and terms such as "first" and "second" do not necessarily mean different.

[0018] It should be noted that in the present invention, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present invention should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0019] In the present invention, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the previous associated objects. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b or c can represent: a, b, c, the combination of a and b, the combination of a and c, the combination of b and c, or the combination of a, b and c, where a, b and c can be single or multiple.

[0020] At present, traditional mineral resource assessment methods mainly rely on geological surveys, geophysical exploration, and geochemical exploration methods. These methods have great limitations, resulting in high exploration costs and low efficiency. Remote sensing technology can obtain large-scale and high-resolution surface information, providing a data basis for geological exploration. However, remote sensing technology may not be sufficient to accurately identify small ore bodies or geological structures, especially for ore bodies hidden under surface coverings, and there are some limitations. Moreover, these methods have not been comprehensively applied to the exploration of bauxite.

[0021] Based on this, in order to improve the prospecting efficiency of bauxite and reduce the prospecting cost of bauxite, the present invention proposes a bauxite prospecting method and device, which combines and comprehensively applies various methods such as geology, geophysical exploration, geochemical exploration, and remote sensing in bauxite exploration, improves the accuracy of delineating the prospecting target area, improves the prospecting efficiency, reduces the exploration cost, and achieves a breakthrough in prospecting.

[0022] Next, the technical solution of the present invention will be described in detail with reference to the accompanying drawings: In the first aspect, the present invention provides a bauxite prospecting method. Please refer to Figure 1 , Figure 1 which is a schematic diagram of the main process of a bauxite prospecting method provided by the present invention. The execution subject of the method is a server or terminal equipped with the bauxite prospecting method provided by the present invention, such as a prospecting exploration service platform or a computer device, etc.

[0023] In Figure 1 , the method may include: Step 110: Obtain target multi-source data of the target prospecting area; the target multi-source data includes at least first geological background data, target remote sensing data, and target gravity and magnetic satellite data.

[0024] Step 120: Based on the first geological background data and the target remote sensing data, update the fold structure and fault structure in the first geological background data to obtain second geological background data.

[0025] In steps 110 to 120, multi-source data including at least geological background data, remote sensing data, and gravity and magnetic satellite data of the target prospecting area can be obtained from various data platforms, such as obtaining the required target data from a geological background data service platform, a remote sensing data service platform, and a gravity and magnetic satellite data service platform, so as to interpret and supplement the geological data of the target area based on these data, update the fold structure and fault structure in the first geological background data, and obtain geological background data with more comprehensive and accurate data content.

[0026] Step 130: Based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data, and according to the metallogenic and ore-controlling rules of bauxite, determine the target ore-forming target areas of bauxite in the target prospecting area.

[0027] In Step 130, the metallogenic and ore-controlling rules of bauxite can be determined by analyzing and studying the metallogenic data of the areas where bauxite has been found, to determine under which formation, geological, or tectonic conditions, etc., the probability of forming bauxite is relatively high. Thus, based on these metallogenic and ore-controlling rules, it can be judged whether the target area has the prerequisite conditions for forming bauxite, avoiding blind area delineation and achieving targeted exploration. And by combining data from three dimensions, remote sensing data, geological background data, and gravity and magnetic satellite data, it is more effective to delineate the preliminary ore-forming target areas, with higher efficiency and lower cost.

[0028] Step 140: Verify the ore-forming conditions of the target ore-forming target areas to obtain ore-forming verification data.

[0029] Step 150: Optimize the ore prospecting for the ore-forming target areas of the target prospecting area based on the ore-forming verification data.

[0030] In Steps 140 to 150, after delineating the preliminary ore-forming target areas (target ore-forming target areas), it is necessary to verify the ore-forming conditions to obtain the ore-forming verification data in the ore-forming target areas. For example, marks can be made in the target areas, and then through field sampling, submission for inspection, and other experimental verifications, the ore-forming verification data can be obtained, and further optimize the ore prospecting for the ore-forming target areas of the target prospecting area, so as to obtain more accurate ore-forming target areas, improving the efficiency and accuracy of ore prospecting.

[0031] Based on this, a bauxite ore prospecting method provided by the present invention realizes the comprehensive delineation of the preliminary ore-forming target areas of the target ore prospecting area by combining geological background, remote sensing data, and gravity and magnetic satellite data, that is, quickly discovering regional bauxite from a wide area; and combining the ore-forming verification data to optimize the ore prospecting for the preliminarily delineated ore-forming target areas, achieving the exploration of bauxite in the target area of the exploration goal of "from point to surface, and then from surface to point". There is no need for excessive geophysical or geochemical exploration methods, which reduces the exploration cost while improving the exploration efficiency, and can also more accurately delineate more economically viable ore-forming target areas to achieve breakthroughs in ore prospecting.

[0032] It should be noted that a bauxite prospecting method and device provided by the present invention can be applied to the exploration and optimization of bauxite prospecting target areas in any region, especially for the exploration and optimization of sedimentary bauxite prospecting target areas. To introduce the solution of this application more clearly, in the specific embodiments of this specification, when demonstrating technical effects or deriving technical purposes based on the technical means provided by the present invention, the data used are the data obtained taking the geological conditions in northeastern Yunnan as an example. It can be understood that as long as the region has the same or similar geological conditions as those in northeastern Yunnan, the method provided by the present invention can be used for the exploration and optimization of bauxite prospecting target areas, improving the prospecting efficiency and reducing the prospecting cost at the same time.

[0033] Currently, in northeastern Yunnan, due to its good bauxite metallogenic geological conditions and high grade, it has the potential to discover large-scale bauxite deposits and has been listed as a key exploration area in the 45th Five-Year Plan of Yunnan Province. However, due to the low exploration degree, unclear resource prospects, and great exploration difficulties, the exploration efficiency of a single exploration means in the existing technology cannot meet the requirements for delineating exploration target areas in northeastern Yunnan.

[0034] Preferably, in step 110, before obtaining the target multi-source data of the target prospecting area, it may include: obtaining the basic multi-source data of the target prospecting area; the basic multi-source data at least includes the basic geological background data, basic remote sensing data, and basic gravity and magnetic satellite data of the target prospecting area.

[0035] Specifically, the basic geological background data at least includes the geological background data of the target prospecting area obtained from geological maps, mineral geological reports, and geological investigation reports; the basic remote sensing data at least includes the remote sensing data of the target prospecting area obtained from the USGS official website and Landsat 8; the basic gravity and magnetic satellite data at least includes the gravity and magnetic satellite data of the target prospecting area obtained from GRACE and / or Tianqin-1 gravity satellite.

[0036] Furthermore, perform data preprocessing on the basic multi-source data to obtain the target multi-source data; it may include the following steps: S1: Perform data processing on the basic geological background data of the target prospecting area to obtain the target geological background data of the geology at a preset ratio; extract the geological background data from the target geological background data to obtain the first geological background data; where the preset ratio may at least include 1:200,000; the first geological background data may at least include the stratigraphy, lithology, folds, faults, alteration types, and paleogeographic lithofacies characteristics of the target prospecting area.

[0037] S2: Perform remote sensing data processing on the basic remote sensing data to obtain the target remote sensing data; the target remote sensing data may at least include Al-OH mineral data, Mg-OH mineral data, and iron-stained alteration anomaly data. Please refer toFigure 2 , Figure 2 This is a schematic diagram of the remote sensing alteration anomaly results in a bauxite prospecting method provided by the present invention. Figure 2 The shown is the remote sensing alteration anomaly result map, which displays the mineral information of Al-OH, the mineral information of Mg-OH, and the iron staining alteration anomaly information in different colors, and can intuitively display the remote sensing alteration anomaly results in the study area.

[0038] It should be noted that the basic remote sensing data of the target prospecting area can be high-quality multi-spectral and hyperspectral data of the target prospecting area; ASTER data can be collected on the USGS official website, and its data characteristics are less cloud and snow coverage and relatively high interpretability; Landsat 8 OLI multi-spectral data and DEM elevation data can be collected on the Geospatial Data Cloud official website, and its data characteristics are less cloud and snow coverage and relatively high interpretability.

[0039] Specifically, first, perform remote sensing data processing on the basic remote sensing data to obtain target remote sensing data, which may include: performing data correction on the basic remote sensing data to obtain intermediate remote sensing data; data correction includes at least radiometric calibration, atmospheric correction, or geometric correction.

[0040] Then, extract the mineral data from the intermediate remote sensing data to obtain target mineral data; the target mineral data includes at least Al-OH mineral data and Mg-OH mineral data; for example: the preprocessed ASTER can be subjected to band ratio method and PCA transformation, and the mineral information containing Al-OH can be extracted by (Band5 + Band7) / Band6; the mineral information containing Mg-OH can be extracted by (Band6 + Band9) / Band8; where, Band represents the frequency band.

[0041] Finally, based on the intermediate remote sensing data, construct an iron staining alteration principal component transformation feature matrix to obtain the iron staining alteration principal component transformation feature matrix, as shown in Table 1, and Table 1 constitutes the eigenvector of the iron staining mineral principal component. The band data in the iron staining alteration principal component transformation feature matrix that meets the preset conditions is identified as iron staining alteration anomaly data; the preset conditions are that the coefficient of band1 and the coefficient of band4 have the same sign and are negative, and the coefficient of band3 and the coefficient of band5 have the same sign and are positive.

[0042] Table 1 Iron staining alteration principal component transformation feature matrix

[0043] It can be obtained from Table 1 that the coefficients of its band1 and band4 have the same and negative signs, the coefficients of band3 and band5 have the same and positive signs, and the coefficients of band1, band3, and band4 of PC4 are all in line. Therefore, PC4 is selected as the main component of the iron-weathering alteration anomaly. Thus, the Landsat 8 OLI multispectral data and DEM elevation data can be used to establish an interpretation mark and extract fault structures according to the abnormal features such as the image tone (color), geomorphic form, and texture of the water system distribution, combined with geological maps, etc.

[0044] Step 1103: Perform gravity and magnetic data processing on the basic gravity and magnetic satellite data to obtain the target gravity and magnetic satellite data; the target gravity and magnetic satellite data includes at least the Bouguer gravity anomaly information, aeromagnetic reduction to the pole anomaly information, and residual Bouguer gravity anomaly information of the target ore prospecting area.

[0045] Specifically, the basic gravity and magnetic satellite data includes at least the gravity satellite data of the preset gravity satellite and the magnetic satellite data of the preset magnetic satellite. Performing gravity and magnetic data preprocessing on the basic gravity and magnetic satellite data to obtain the target gravity and magnetic satellite data may include: First, perform gravity satellite data preprocessing on the gravity satellite data of the preset gravity satellite to obtain the vertical first-order or second-order derivative map of the preset gravity satellite; the gravity satellite data preprocessing includes at least upward continuation and derivative operation of gravity anomaly, extraction of residual field gravity and magnetic data, and two-dimensional or three-dimensional derivative inversion calculation. Second, perform magnetic satellite data preprocessing on the magnetic satellite data of the preset magnetic satellite to obtain the vertical first-order or second-order derivative map of the preset magnetic satellite; the magnetic satellite data preprocessing includes at least processing and analysis of aeromagnetic reduction to the pole anomaly information and two-dimensional or three-dimensional derivative inversion calculation. Finally, based on the vertical first-order or second-order derivative map of the gravity satellite and the vertical first-order or second-order derivative map of the magnetic satellite, the target gravity and magnetic satellite data is obtained.

[0046] As an example, gravity satellite data such as GRACE and Tianqin-1 can be used, and information processing and analysis such as upward continuation and derivative operation of gravity anomaly and extraction of residual field are carried out. Through methods such as two-dimensional / three-dimensional derivative inversion calculation, the vertical first-order / second-order derivative map of the gravity satellite is obtained. Then, magnetic satellite data such as Zhangheng-1 and Swarm are used to carry out processing and analysis of the magnetization reduction to the pole anomaly information. Through methods such as two-dimensional / three-dimensional derivative inversion calculation, the vertical first-order / second-order derivative map of the magnetic satellite is obtained. Finally, based on the vertical first-order / second-order derivative map of the gravity satellite and the vertical first-order / second-order derivative map of the magnetic satellite, the target gravity and magnetic satellite data is obtained. Analyzing the distribution characteristics of its ore bodies, it can be obtained that the bauxite in the northeastern Yunnan region mainly outcrops in the aeromagnetic reduction to the pole negative anomaly or transition zone, in the abnormal high-value area of the low-value area of the residual gravity anomaly, and outcrops in the Bouguer gravity negative anomaly and its transition zone.

[0047] Preferably, in step 120, based on the first geological background data and the target remote sensing data, determining the fold structures and fault structures in the first geological background data to obtain the second geological background data may include: First, based on the stratigraphic information in the first geological background data, combining with the target remote sensing data, establishing stratigraphic interpretation marks; based on the stratigraphic interpretation marks, extracting intermediate fold structures; using the intermediate fold structures to update the fold structures in the first geological background data to obtain the target fold structures.

[0048] Then, based on the geological map in the first geological background data, combining with the target remote sensing data, establishing fault interpretation marks; based on the fault interpretation marks, extracting intermediate fault structures; using the intermediate fault structures to update the fault structures in the first geological background data to obtain the target fault structures.

[0049] Finally, after replacing the fold structures and fault structures in the first geological background data with the target fold structures and target fault structures, the second geological background data is obtained.

[0050] Please refer to Figures 3 to 4 , Figure 3 which is a schematic diagram of the remote sensing interpretation fold result in a bauxite prospecting method provided by the present invention; Figure 4 which is a schematic diagram of the remote sensing interpretation stratigraphic result in a bauxite prospecting method provided by the present invention; It can be unambiguously obtained from Figure 3 that: judging the folds according to the old and new relationships of the strata: at the same horizontal plane, the middle of the anticline is the old stratum, and the two sides are the new strata; the middle of the syncline is the new stratum, and the two sides are the old strata. It can be unambiguously obtained from Figure 4 that: stratigraphic interpretation marks can be established according to the existing stratigraphic information and combining with the color, shape and texture characteristics of the remote sensing image, so as to supplement the stratigraphic information of the study area according to the stratigraphic interpretation marks.

[0051] Based on this, it is realized to establish stratigraphic and fault interpretation marks according to the existing stratigraphic information and combining with the remote sensing image, supplement the stratigraphic information of the study area according to the stratigraphic and fault interpretation marks, and thus extract new fold structures and fault structures.

[0052] Preferably, before step 130, that is, before determining the target ore-forming target area of bauxite in the target prospecting area according to the ore-forming and ore-controlling rules of bauxite based on the target remote sensing data, the second geological background data and the target gravity and magnetic satellite data, it may include: determining the ore-forming and ore-controlling rules of bauxite.

[0053] The metallogenic and ore - controlling rules of bauxite should at least include metallogenic conditions, ore - controlling factors, and prospecting indicators. Among them, metallogenic conditions are used to represent the geographical environmental conditions for the formation of bauxite, ore - controlling factors are used to represent the controlling factors for the occurrence of bauxite, and prospecting indicators are used to represent the indicator information of the existence of bauxite. The indicator information at least includes strata, provenance, fold structures, alteration information, and gravity and magnetic anomaly information. Based on this, this rule can be used to quickly narrow down a large - scale prospecting area to a small - scale prospecting area, thereby improving the efficiency of prospecting.

[0054] Specifically, the following method can be used to analyze the metallogenic and ore - controlling conditions of bauxite, especially for typical sedimentary bauxite: (I) Metallogenic conditions: In the Middle - Late Permian, affected by the Dongwu Movement, the crust in southeastern Yunnan rose, causing the basalt of the Emeishan Formation in the Middle - Upper Permian, and the limestone of the Permian and Carboniferous systems to be exposed to the surface for a long time and undergo weathering and erosion, providing a rich material basis for the formation of bauxite. In the first stage of the early Wujiaping period of the Late Permian, with the occurrence of transgression, the ancient weathered crust materials and terrigenous clastic materials from the surrounding ancient land were deposited in the shore - shallow sea environment to form bauxite.

[0055] (II) Ore - controlling factors: The occurrence of bauxite is controlled by stratigraphic horizons. The ore body occurs in the lower part of the Wujiaping Member of the Upper Permian on the ancient weathered erosion surface between the Middle - Upper Permian, within the transgressive system tract above the parallel unconformity surface, parallel - unconformably overlying the basalt of the Emeishan Formation in the Middle - Upper Permian and the limestone of the Weining Formation of the Upper Carboniferous, and mainly occurs at the bottom of the Xuanwei Formation of the Upper Permian and the Liangshan Formation of the Middle Permian.

[0056] (III) Prospecting indicators: 1. Strata. Bauxite deposits mainly occur at the bottom of the Xuanwei Formation of the Upper Permian and the Liangshan Formation of the Middle Permian, and the basalt of the Emeishan Formation in the Permian is developed around.

[0057] 2. Provenance. Basalt and limestone are the ore - forming parent rocks of bauxite. Under the same favorable metallogenic conditions, the possibility of basalt as the ore - forming parent rock of bauxite is much greater than that of limestone.

[0058] 3. Fold structures. The secondary anticlines and synclines in the area can be used as structural indicators for bauxite prospecting, especially synclines can be used as structural indicators for finding bauxite. Fold structures control the distribution of the ore - source bed. Generally, it is more favorable to look for ore bodies in the inner part of anticlines or the outer part of synclines. After ore formation, fold structures play a role in protecting and destroying the ore layer. Generally, synclines can protect the ore layer from erosion and preservation, while anticlines cause the ore layer to be eroded and damaged. The secondary anticlines and synclines in the area, especially synclines, can be used as structural indicators for finding bauxite.

[0059] 4. Alteration information. Bauxite is mainly concentrated in the alteration anomaly areas such as Al-OH, Mg-OH, and iron staining. 5. Gravity and magnetic anomalies.

[0060] According to research and analysis, its ore body distribution characteristics are as follows: The bauxite in northeastern Yunnan mainly outcrops within the aeromagnetic reduction-to-the-pole negative anomaly or transition zone, within the high-value anomaly area of the residual gravity anomaly low-value area, and outcrops within the Bouguer gravity negative anomaly and its transition zone.

[0061] Preferably, in step 130, based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data, according to the ore-forming and ore-controlling rules of bauxite, to determine the target ore-forming target area of bauxite in the target prospecting area, it may include: superimposing the mineral alteration image of Al-OH and the iron staining alteration anomaly image to obtain a superimposed alteration image; marking the area where the alteration anomaly information is concentrated in the superimposed alteration image to obtain the target alteration anomaly information concentration area; extracting from the second geological background data the area near the anticline and syncline with the Middle-Upper Permian Emeishan basalt, the bottom of the Upper Permian Xuanwei Formation, or the Middle Permian Liangshan Formation to obtain the target geographical location area; based on the target alteration anomaly information concentration area, the target geographical location area, and the target gravity and magnetic satellite data, determining the target area with target mineralization factors in the target prospecting area; the target mineralization factors at least include known mineralization points, mineralization outcrops, and mineralization alterations; taking the target area as the target ore-forming target area of bauxite in the target prospecting area.

[0062] Specifically, it is possible to superimpose according to the Al-OH mineral alteration and the iron staining alteration anomaly, and highlight the area where the alteration anomaly information is concentrated; Sedimentary bauxite is mainly hosted in the bottom of the Upper Permian Xuanwei Formation and the Middle Permian Liangshan Formation. The Emeishan basalt of the Permian, and the Permian and Carboniferous limestones provide a rich material basis for the formation of bauxite. Select the area near the anticline and syncline with the Middle-Upper Permian Emeishan basalt, the bottom of the Upper Permian Xuanwei Formation, or the Middle Permian Liangshan Formation, and integrate and analyze it with the area where the alteration anomaly information is concentrated, fault structures, and gravity and magnetic information, and select the area where all mineralization clues are distributed; The prospecting target area delineated by certain mineralization clues (such as known mineralization points, mineralization outcrops, mineralization alteration phenomena, etc.) should include the area where all the above mineralization clues are distributed, and conduct a preliminary delineation of the prospecting target area.

[0063] Preferably, in step 140, to conduct ore-forming verification on the target ore-forming target area to obtain ore-forming verification data, it may include: obtaining the detection data of multiple field sampling points and the geological data of multiple verification points; the detection data at least includes the data of Al grade and / or aluminum-silicon ratio; the geological data at least includes alteration, lithology, stratigraphy, and tectonic information; the multiple field sampling points and the multiple verification points are the marked points in the target ore-forming target area; taking the detection data of the multiple field sampling points and the geological data of the multiple verification points as the ore-forming verification data.

[0064] Specifically, the target ore-forming target area can be marked with field sampling points and verification points first to obtain a plurality of field sampling points and a plurality of verification points; the geological outcrops of the sampling points are sampled in the field and sent for inspection, and the grade data of Al and Al / Si are analyzed to obtain the sample data of the field sampling, as shown in Table 2; and further verify the geological information such as alteration, lithology, stratigraphy, and tectonic information of the verification points.

[0065] Table 2 Sample Data

[0066] Based on this, the ore-forming verification data of the target ore-forming target area preliminarily delineated in the target ore prospecting area are obtained, so that the ore-forming area in the target ore prospecting area can be further optimized.

[0067] Preferably, in step 150, based on the ore-forming verification data, ore prospecting optimization of the ore-forming target area in the target ore prospecting area may include: comparing the ore-forming verification data with the remote sensing interpretation marks to obtain a comparison result; if the comparison result indicates that the difference between the ore-forming verification data and the remote sensing interpretation marks exceeds a preset threshold, then optimize the remote sensing interpretation marks based on the ore-forming verification data until the difference between the finally obtained ore-forming verification data and the previously updated remote sensing interpretation marks meets the preset threshold, so as to obtain the ore-forming target area of the target ore prospecting area.

[0068] Specifically, the alteration, lithology, stratigraphy, and tectonic information of the field verification points can be compared with the information interpreted by remote sensing. If the degree of coincidence is poor, the interpretation marks are re-established according to the field verification information to optimize the interpretation result until the degree of coincidence is good. Since the ore-forming process of bauxite is a process of removing Si, Ca, and Na and enriching Al, Ti, and Fe, the higher the Al / Si (aluminum-silicon ratio), the higher the enrichment degree and economic benefit of bauxite. Overlay and analyze all remote sensing interpretation and field verification results, and at the same time combine the Al grade and Al / Si to optimize the ore prospecting target area; so as to delineate a more economically viable ore prospecting target area.

[0069] Please refer to Figure 5 , Figure 5 for the schematic diagram of the ore prospecting target area result in a bauxite ore prospecting method provided by the present invention; the result shown in Figure 5 is the ore prospecting target area of the target ore prospecting area obtained by overlay and analyzing all remote sensing interpretation and field verification results, and at the same time combining the Al grade and Al / Si; the on-site exploration result shows that the bauxite ore prospecting method of the present invention has high ore prospecting efficiency, and high accuracy and reliability, and the determined bauxite ore target areas are all rich in bauxite and have great economic value.

[0070] Second aspect, the present invention provides a bauxite prospecting device. Please refer to Figure 6 , Figure 6 , which is a schematic structural diagram of a bauxite prospecting device provided by the present invention.

[0071] In Figure 6 , the device may include: A data acquisition module 610, configured to acquire target multi-source data of a target prospecting area; the target multi-source data at least includes first geological background data, target remote sensing data, and target gravity and magnetic satellite data.

[0072] A data update module 620, configured to update the fold structure and fault structure in the first geological background data based on the first geological background data and the target remote sensing data to obtain second geological background data.

[0073] An ore-forming target area determination module 630, configured to determine a target ore-forming target area of bauxite in the target prospecting area according to the ore-forming and ore-controlling rules of bauxite based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data.

[0074] An ore-forming condition verification module 640, configured to verify the ore-forming conditions of the target ore-forming target area to obtain ore-forming verification data.

[0075] An optimization module 650, configured to optimize the ore prospecting of the ore-forming target area of the target prospecting area based on the ore-forming verification data.

[0076] Based on this, a bauxite prospecting device provided by the present invention utilizes a data acquisition module 610 to acquire target multi-source data of a target prospecting area; the target multi-source data at least includes first geological background data, target remote sensing data, and target gravity and magnetic satellite data; then, a data update module 620 is used to update the fold structure and fault structure in the first geological background data based on the first geological background data and the target remote sensing data to obtain second geological background data; then, an ore-forming target area determination module 630 is used to determine the target ore-forming target area of bauxite in the target prospecting area based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data according to the ore control rules of bauxite; further, an ore-forming condition verification module 640 is used to verify the ore-forming conditions of the target ore-forming target area to obtain ore-forming verification data; finally, an optimization module 650 is used to optimize the ore-forming target area of the target prospecting area based on the ore-forming verification data; based on this, the bauxite prospecting device provided by the present invention combines geological, geophysical, and remote sensing means to observe and analyze the target prospecting area, quickly discovers regional bauxite from a wide range, and then optimizes the area where bauxite may exist in the regional bauxite, thereby delineating the prospecting target area; realizes the exploration of bauxite "from point to area, and then from area to point", effectively improves the accuracy and efficiency of bauxite exploration, reduces the exploration cost, and achieves a breakthrough in prospecting.

[0077] Although the present invention has been described in connection with various embodiments, however, in the process of implementing the claimed invention, those skilled in the art can understand and realize other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit may implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0078] Although the present invention has been described in connection with specific features and their embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present invention. Accordingly, the present specification and the drawings are merely exemplary illustrations of the present invention defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A bauxite prospecting method, characterized in that, Including: Obtaining target multi-source data of a target prospecting area; The target multi-source data at least includes first geological background data, target remote sensing data, and target gravity and magnetic satellite data; Based on the first geological background data and the target remote sensing data, updating the fold structure and fault structure in the first geological background data to obtain second geological background data; Based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data, and according to the ore-forming and ore-controlling rules of bauxite, determining the target ore-forming target area of bauxite in the target prospecting area; Verifying the ore-forming conditions of the target ore-forming target area to obtain ore-forming verification data; Based on the ore-forming verification data, optimizing the ore prospecting of the ore-forming target area in the target prospecting area.

2. The bauxite prospecting method according to claim 1, wherein Before obtaining the target multi-source data of the target prospecting area, it includes: Obtaining the basic multi-source data of the target prospecting area; the basic multi-source data at least includes the basic geological background data, basic remote sensing data, and basic gravity and magnetic satellite data of the target prospecting area; Performing data preprocessing on the basic multi-source data to obtain the target multi-source data; The performing data preprocessing on the basic multi-source data to obtain the target multi-source data includes: Performing data processing on the basic geological background data of the target prospecting area to obtain target geological background data of the geology at a preset ratio; extracting the geological background data from the target geological background data to obtain the first geological background data, and the preset ratio is at least 1:200,000; the first geological background data at least includes the strata, lithology, folds, faults, alteration types, and paleogeographic lithofacies characteristics of the target prospecting area; Performing remote sensing data processing on the basic remote sensing data to obtain the target remote sensing data; the target remote sensing data at least includes Al-OH mineral data, Mg-OH mineral data, and ferric iron alteration anomaly data; Performing gravity and magnetic data preprocessing on the basic gravity and magnetic satellite data to obtain the target gravity and magnetic satellite data; the target gravity and magnetic satellite data at least includes the Bouguer gravity anomaly information, aeromagnetic reduced-to-pole anomaly information, and residual Bouguer gravity anomaly information of the target prospecting area.

3. The bauxite prospecting method according to claim 2, characterized in that, The performing remote sensing data processing on the basic remote sensing data to obtain the target remote sensing data includes: Performing data correction on the basic remote sensing data to obtain intermediate remote sensing data; the data correction at least includes radiometric calibration, atmospheric correction, or geometric correction; Extracting the mineral data from the intermediate remote sensing data to obtain target mineral data; the target mineral data at least includes the Al-OH mineral data and the Mg-OH mineral data; Based on the intermediate remote sensing data, constructing a ferric iron alteration principal component transformation feature matrix; Determining the band data in the ferric iron alteration principal component transformation feature matrix that meets the preset conditions as the ferric iron alteration anomaly data; the preset conditions are that the coefficient of band1 and the coefficient of band4 have the same sign and are negative, and the coefficient of band3 and the coefficient of band5 have the same sign and are positive.

4. The bauxite prospecting method according to claim 2, characterized in that, The basic gravity and magnetic satellite data at least includes the gravity satellite data of a preset gravity satellite and the magnetic satellite data of a preset magnetic satellite; The preprocessing of the basic gravity and magnetic satellite data to obtain the target gravity and magnetic satellite data includes: Preprocessing the gravity satellite data of the preset gravity satellite to obtain the vertical first-order or second-order derivative map of the preset gravity satellite; the preprocessing of the gravity satellite data at least includes upward continuation and derivative operation of gravity anomaly, extraction of residual field gravity and magnetic data, and two-dimensional or three-dimensional derivative inversion calculation; Preprocessing the magnetic satellite data of the preset magnetic satellite to obtain the vertical first-order or second-order derivative map of the preset magnetic satellite; the preprocessing of the magnetic satellite data at least includes processing and analysis of aeromagnetic polarization anomaly information, and two-dimensional or three-dimensional derivative inversion calculation; Based on the vertical first-order or second-order derivative map of the gravity satellite and the vertical first-order or second-order derivative map of the magnetic satellite, the target gravity and magnetic satellite data is obtained.

5. The bauxite prospecting method according to claim 1, characterized in that The determination of the fold structure and fault structure in the first geological background data based on the first geological background data and the target remote sensing data to obtain the second geological background data includes: Based on the stratigraphic information in the first geological background data, combined with the target remote sensing data, establishing stratigraphic interpretation marks; Extracting intermediate fold structures based on the stratigraphic interpretation marks; Updating the fold structure in the first geological background data with the intermediate fold structure to obtain the target fold structure; Based on the geological map in the first geological background data, combined with the target remote sensing data, establishing fault interpretation marks; Extracting intermediate fault structures based on the fault interpretation marks; Updating the fault structure in the first geological background data with the intermediate fault structure to obtain the target fault structure; After replacing the fold structure and fault structure in the first geological background data with the target fold structure and the target fault structure, the second geological background data is obtained.

6. The bauxite prospecting method according to claim 1, characterized in that, Before determining the target ore-forming target area of bauxite in the target ore prospecting area based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data according to the ore-forming and ore-controlling rules of bauxite, it includes: Determining the ore-forming and ore-controlling rules of bauxite; The ore-forming and ore-controlling rules of bauxite at least include ore-forming conditions, ore-controlling factors, and ore prospecting marks; The ore-forming conditions are used to represent the geographical environmental conditions for the formation of bauxite; The ore-controlling factors are used to represent the controlling factors for the occurrence of bauxite; The ore prospecting marks are used to represent the mark information indicating the existence of bauxite, and the mark information at least includes strata, material source, fold structure, alteration information, and gravity and magnetic anomaly information.

7. The bauxite prospecting method according to claim 1, characterized in that The determination of the target ore-forming target area of bauxite in the target ore prospecting area based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data according to the ore-forming and ore-controlling rules of bauxite includes: Overlaying the mineral alteration image of Al-OH and the iron-stained alteration anomaly image to obtain an overlaid alteration image; Mark the areas enriched with altered anomaly information in the superimposed altered image to obtain the target areas enriched with altered anomaly information; Extract from the second geological background data the areas with Middle-Upper Permian Emeishan basalt, the bottom of the Upper Permian Xuanwei Formation, or the Middle Permian Liangshan Formation near anticlines and synclines to obtain the target geographical location areas; Based on the target areas enriched with altered anomaly information, the target geographical location areas, and the target gravity and magnetic satellite data, determine the target areas with target mineralization factors in the target ore prospecting area; the target mineralization factors include at least known mineralization points, mineralization outcrops, and mineralization alteration; Take the target areas as the target ore-forming target areas for bauxite in the target ore prospecting area.

8. The bauxite prospecting method according to claim 1, characterized in that The ore-forming verification of the target ore-forming target area to obtain ore-forming verification data includes: Obtain the detection data of multiple field sampling points and the geological data of multiple verification points; the detection data includes at least data of Al grade and / or aluminum-silicon ratio; the geological data includes at least alteration, lithology, stratigraphy, and tectonic information; the multiple field sampling points and the multiple verification points are the marked points in the target ore-forming target area; Take the detection data of multiple field sampling points and the geological data of multiple verification points as the ore-forming verification data.

9. The bauxite prospecting method according to claim 1, characterized in that, The ore prospecting optimization of the ore-forming target area in the target ore prospecting area based on the ore-forming verification data includes: Compare the ore-forming verification data with the remote sensing interpretation signs to obtain a comparison result; If the comparison result indicates that the difference between the ore-forming verification data and the remote sensing interpretation signs exceeds a preset threshold, optimize the remote sensing interpretation signs based on the ore-forming verification data until the difference between the finally obtained ore-forming verification data and the previously updated remote sensing interpretation signs meets the preset threshold, to obtain the ore-forming target area in the target ore prospecting area.

10. An aluminum bauxite prospecting device, characterized in that, Including: A data acquisition module for acquiring the target multi-source data of the target ore prospecting area; The target multi-source data includes at least the first geological background data, the target remote sensing data, and the target gravity and magnetic satellite data; A data update module for updating the fold structures and fault structures in the first geological background data based on the first geological background data and the target remote sensing data to obtain the second geological background data; An ore-forming target area determination module for determining the target ore-forming target area for bauxite in the target ore prospecting area based on the target remote sensing data, the second geological background data, and the target gravity and magnetic satellite data according to the ore control and formation rules of bauxite; An ore-forming condition verification module for verifying the ore-forming conditions of the target ore-forming target area to obtain ore-forming verification data; An optimization module for optimizing the ore prospecting of the ore-forming target area in the target ore prospecting area based on the ore-forming verification data.

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