A method for compiling digital geological maps of sandstone-type uranium deposits

Abstract

The present invention belongs to the technical field of basic research on uranium geology, and specifically relates to a method for compiling a digital geological map of sandstone-type uranium ore, including: step 1, geological data collection, collation and analysis; step 2, regional geological background research and typical ore deposit research; step 3, data import and uranium geology special editing; step 4, map content and quality inspection; step 5, database construction; step 6, compilation of instructions and application of map results. The present invention can efficiently and quickly compile a sandstone-type uranium ore geological map that can comprehensively reflect the latest results of uranium geological exploration and scientific research in a certain area, and can further guide the practicality of uranium geological exploration through the collection and collation of geological data, comprehensive research on typical ore deposits, identification and extraction of uranium mineralization geological information, map compilation and database construction.

Description

Technical Field

[0001] The invention belongs to the technical field of basic research on uranium geology, and in particular relates to a method for compiling a digital geological map of sandstone-type uranium ore. Background Art

[0002] With the rapid development of my country's geological undertakings, the compilation and application of geological maps have also undergone significant changes, gradually transforming from traditional paper mapping to digital mapping. The compilation and application of uranium digital geological maps are very important for uranium geological exploration and uranium geological research. Uranium geological maps can often reflect the latest results of uranium geological exploration and research in a certain period or region, and reflect the latest scientific level of uranium geological development. They are the basic maps for understanding and analyzing the regional geological background, geological environment, regional uranium mineralization geological conditions and regional uranium mineralization relationships.

[0003] In the process of uranium geological exploration and research, how to quickly compile a detailed and clear uranium geological map is crucial to the exploration and research results. However, it is not easy to quickly compile such a uranium geological map in the actual work process, which often requires a lot of manpower, material resources and financial resources. The first is the richness, accuracy and reliability of the data, followed by the data format and quality, and then the problem of expressing uranium geological information in detail and clearly, and finally the problem of database construction and map sharing and application.

[0004] Therefore, it is urgent to develop a method for compiling digital geological maps of sandstone-type uranium deposits. Summary of the invention

[0005] The purpose of the present invention is to provide a method for compiling a digital geological map of sandstone-type uranium deposits. The method can efficiently and quickly compile a sandstone-type uranium deposit geological map that can comprehensively reflect the latest results of uranium geological exploration and scientific research in a certain area and can further guide the practicality of uranium geological exploration through the collection and organization of geological data, comprehensive research on typical ore deposits, identification and extraction of uranium mineralization geological information, map compilation and database construction.

[0006] The technical solution to achieve the purpose of the present invention is:

[0007] A method for compiling a digital geological map of sandstone-type uranium deposits, comprising the following steps:

[0008] Step 1: Collection, organization and analysis of geological data;

[0009] Step 2: Regional geological background research and typical mineral deposit research;

[0010] Step 3, data import and uranium geology special editing;

[0011] Step 4: Check the content and quality of the drawing;

[0012] Step 5: Database construction;

[0013] Step 6: Prepare instructions and drawings for application of results.

[0014] The step 1 comprises:

[0015] Step 1.1, systematically collect geological reports, literature, geological maps and databases within the mapping scope;

[0016] Step 1.2: Organize and analyze the data.

[0017] The step 1.1 is specifically as follows: comprehensively collect and organize geological data within the scope of mapping, and merge and comprehensively organize the collected data by type.

[0018] The geological data in step 1.1 include: uranium geology, basic geology, geophysics, geochemistry, remote sensing, hydrogeology, prospecting engineering, mineral data and in-situ leaching parameters.

[0019] The step 1.2 is specifically as follows: ascertain the source and reliability of the data, sort out the accuracy of the data, the degree of conformity of the data content with the current state of exploration and research, and the distribution of data within the scope of mapping, and then classify, proofread, integrate and merge the data.

[0020] The step 2 comprises:

[0021] Step 2.1, study of regional uranium mineralization geological background;

[0022] Step 2.2, study of typical mineral deposits.

[0023] The step 2.1 is specifically as follows: analyzing the relationship between the geological structure, stratigraphic sedimentary structure and uranium ore in the stratigraphic area in terms of time, space, material composition and geotectonic environment, and exploring the control of basin tectonic system, tectonic paleogeographic environment, sedimentary structure and sedimentary phase on uranium mineralization.

[0024] The step 2.2 is specifically as follows: conducting research on uranium mineralization geological conditions, analyzing uranium source conditions, structural conditions, lithology-facies conditions of prospecting target layers, paleoclimate conditions, hydrogeological conditions and epigenetic alteration conditions; conducting research on mineralization geological characteristics, analyzing the three-dimensional spatial distribution characteristics of the ore deposits, the material composition of the ore deposits, the mineralization geochemical characteristics, the mineralization geological effects, the geological age and the geological evolution stage; determining the target layers for mapping, distinguishing the basin basement structure and the cover structure, and determining the computer-identifiable structural, construction and epigenetic transformation control factors on uranium mineralization.

[0025] The step 3 comprises:

[0026] Step 3.1, data format unification and uranium geology standardization;

[0027] Step 3.2, special topic editing of uranium geology;

[0028] Step 3.3, drawing preparation.

[0029] The step 3.1 is specifically as follows: using MapGIS as the standard data format, the collected and organized ArcGIS, CAD, MapInfo, GeoMap and spreadsheet data are converted into MapGIS data through a public exchange format, and the converted data are subjected to standard frame registration, correction, and projection transformation to ensure that data of different accuracies and scales can be converted within the unified spatial range of mapping.

[0030] The step 3.2 is specifically as follows: simplify and merge the strata, highlight the information of the target ore-bearing strata, refine the target ore-bearing strata into groups, groups or sections as units, and mark them with corresponding codes; the ore-forming structural layer is divided into two types: faults and folds, highlighting the faults and fold structures formed since the deposition and diagenesis of the target ore-bearing strata inside the basin; the basement rock body, highlighting the uranium-rich (layer) body in the erosion source area of ​​the basin (usually refers to the uranium content greater than 10×10 -6 )'s spatial distribution characteristics; for the mineral map layer, it is necessary to merge the uranium mineralization types, and overlay the oil and gas fields, coal fields and other mineral information layers to highlight the spatial distribution relationship between uranium mineralization information and other mineral information, marked with corresponding sub-map codes; after the special layers are highlighted and merged, start editing the point, line and surface files in the vectorized layer one by one.

[0031] The contents of the sandstone-type uranium ore geological map in step 3.3 include: a plan geological map, a geological cross-section map, a stratigraphic comprehensive column map, an angular map, a legend, a linear scale, a map name and a responsibility table.

[0032] The step 4 is specifically as follows: check whether the projection parameters of each layer in the map are consistent with the engineering projection parameters and meet the requirements of the map space parameters; whether the registration and error correction of the graphics and the projection parameters are correct; whether the merger and division of the uranium mine thematic layers are reasonable, and whether there are missing items or redundant items; whether the drawing content is consistent with reality; check the topological relationship between the surface file and the line file; check the accuracy of the division and spatial distribution of uranium mineralization and other mineral information types; whether the drawing finishing meets the requirements of the uranium mine geological mapping specifications.

[0033] The step 5 comprises:

[0034] Step 5.1, database structure establishment;

[0035] Step 5.2, attribute data entry and database check.

[0036] The step 5.1 is specifically as follows: establishing data attribute structures for different layers in the drawing respectively to ensure the complete preservation of information data.

[0037] The step 5.2 is specifically as follows: after the attribute data structure of each layer is established, the corresponding attribute content is entered according to the requirements of different attribute fields. After all data attributes are entered, a database quality check is carried out to ensure that the data stored in the database is accurate.

[0038] The entry of attributes in step 5.2 is divided into manual entry and batch attribute or parameter hooking entry. Batch attribute entry can be assisted by Section plug-in.

[0039] The database quality check in step 5.2 includes: data integrity, logic, accuracy and spatial localization.

[0040] The step 6 is specifically as follows: according to the mapping requirement of one map, one database and one description, a map description is compiled to facilitate various users to share and use the maps; the compiled contents mainly include the mapping scope, main work process, drawing content, completed workload and mapping quality, mapping data and sources, mapping principles and basis, existing problems and disposal status; digital maps and databases can be published, shared and used simultaneously.

[0041] The beneficial technical effects of the present invention are:

[0042] 1. The present invention utilizes the comprehensive technology of "GIS technology + computer technology + uranium geological professional knowledge" to organically combine uranium geological knowledge, geological laws, sandstone-type uranium mapping technology and mapping thinking, and computer-recognizable geological data, and identifies, extracts, and merges geological elements related to uranium mineralization from massive data of different departments (petroleum geology, uranium geology, coalfield geology, etc.), data of different scales, different formats (vector data, form data, raster data) or paper data, and quickly and efficiently compiles a detailed and clear uranium geological map that can guide uranium geological exploration. This method can also be further extended to the compilation of other series of basic maps and achievement maps required for uranium geological exploration and research.

[0043] 2. The present invention introduces the specific steps of a sandstone-type uranium ore digital geological map compilation technology method, which is highly operable.

[0044] 3. Based on the research on regional uranium mineralization geological background and typical ore deposits, the present invention can clarify the items, contents and precautions of sandstone-type uranium geology special editing, and the map content can highlight the particularity of uranium geology.

[0045] 4. Based on the data attribute structure and database construction of sandstone-type uranium deposits, the present invention facilitates the storage, preservation and conversion of sandstone-type uranium deposit mineralization elements, facilitates the prediction of uranium mineralization prospects in the later stage and guides uranium geological exploration. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below in conjunction with embodiments.

[0047] The present invention provides a method for compiling a digital geological map of sandstone-type uranium deposits, which specifically comprises the following steps:

[0048] Step 1: Collection, organization and analysis of geological data

[0049] Step 1.1 Systematically collect geological reports, literature, geological maps and databases within the mapping scope

[0050] The uranium geology, basic geology, geophysics, geochemistry, remote sensing, hydrogeology, prospecting engineering and mineral data within the scope of the map compilation should be fully collected and sorted out. In areas with in-situ leaching sandstone uranium deposits or in-situ leaching uranium mines, in-situ leaching parameter data should also be collected. Among them, the uranium geological data should focus on collecting uranium geological exploration data, uranium regional evaluation data, uranium geological records, radioactive measurement data, regional uranium mineralization law data, uranium resource survey and evaluation results, and uranium geological work degree database and uranium production area database. The collected data should be merged and comprehensively sorted out by type.

[0051] Step 1.2 Data collation and comprehensive analysis

[0052] The collected data should be systematically sorted, analyzed and digested. First, the source and reliability of the data should be found out, and then the accuracy of the data, the degree of conformity of the data content with the current situation of exploration and research, and the distribution of data within the scope of mapping should be sorted out, and then the data should be classified, proofread, integrated and merged.

[0053] Step 2: Regional geological background research and typical mineral deposit research

[0054] Step 2.1: Study on the regional uranium mineralization geological background

[0055] The relationship between the geological structure, stratigraphic sedimentary structure and uranium ore in the strata in terms of time, space, material composition and tectonic environment in the mapping area is analyzed, and the control of basin tectonic system, tectonic paleogeographic environment, sedimentary structure and sedimentary phase on uranium mineralization is discussed.

[0056] Step 2.2, Typical Mineral Deposits Research

[0057] Conduct research on uranium mineralization geological conditions, analyze uranium source conditions (uranium content in basement rocks and basin cover sedimentary structures), structural conditions, lithology-facies conditions of prospecting target layers, paleoclimate conditions, hydrogeological conditions, and epigenetic alteration conditions; conduct research on mineralization geological characteristics, analyze the three-dimensional spatial distribution characteristics of ore deposits, ore deposit material composition, mineralization geochemical characteristics, mineralization geological effects, geological eras, and geological evolution stages; determine mapping target layers, distinguish basin basement structures and cover structures, and determine the computer-identifiable control factors of structures, structures, and epigenetic modifications on uranium mineralization.

[0058] Step 3: Data import and uranium geology topic editing

[0059] Step 3.1: Data format unification and uranium geology standardization

[0060] The data format is required to be unified and standardized. The present invention uses MapGIS as the standard data format, and converts the collected and sorted ArcGIS, CAD, MapInfo, GeoMap and electronic spreadsheet data into MapGIS data through a public exchange format, and performs standard frame registration, correction, and projection transformation on the converted data to ensure that data of different precisions and scales can be converted within the unified spatial range of the map. Among them, paper maps need to be scanned, mosaic-registered, corrected, and vectorized, and the data projection parameters and coordinate system are set to be consistent with the compiled map.

[0061] Step 3.2, Uranium Geology Special Topic Editing

[0062] According to the research results of step 2, a digital sandstone-type uranium geological map is compiled by editing and merging the basin basement rock mass, uranium mineralization structure, strata, uranium mineralization information and other mineral information. Simplify and merge strata, highlight the information of mineralized target layers, refine mineralized target layers into groups, groups or sections as units, and mark them with corresponding codes; merge the Archean and Proterozoic into one layer, represented by Ar and Pt respectively; simplify and merge the direct basement of the Paleozoic into systems as units, and mark them with the codes of the corresponding periods; refine the Mesozoic and Cenozoic into groups (groups) as units. The mineralization structure layer is divided into two types: faults and folds. Among them, faults are divided into faults in the erosion source area and faults inside the basin. Folds are mainly folds inside the basin. It is necessary to highlight the faults and fold structures formed since the deposition and diagenesis of the mineralized target layer inside the basin; for the basement rock mass, it is necessary to highlight the uranium-rich (layer) body (usually refers to the uranium content greater than 10×10 -6) spatial distribution characteristics; mineral map layer, need to merge uranium mineralization type (refer to the uranium mineralization type classification scheme in uranium mineral records), and superimpose oil and gas fields and coal fields and other mineral information layers, highlight the spatial distribution relationship of uranium mineralization information and other mineral information, marked with corresponding sub-map codes. After highlighting and merging special layers, start editing the point (.wt), line (.wl) and surface (.wp) files in the vectorized layer one by one.

[0063] Step 3.3, drawing preparation

[0064] The content of the sandstone-type uranium ore geological map mainly includes eight parts: plane geological map, geological profile map, stratigraphic comprehensive column map, angular map, legend, linear scale, map name, responsibility table, etc. In the editing and compilation process of each part, the color and pattern symbols, line shape, legend and other contents that identify lithology-facies should refer to the "Legend of Regional Geological Map" (GB / T 958) and "Regulations on the Preparation of Geological Maps of In-situ Leachable Sandstone-Type Uranium Deposits" (EJ / T 20003) to compile a uranium ore geological map that meets the requirements of the standard.

[0065] Step 4: Check the content and quality of the drawing

[0066] Carry out quality inspection on the sandstone-type uranium geological map compiled in step 3.3. The inspection mainly includes whether the projection parameters of each layer in the map are consistent with the engineering projection parameters and meet the requirements of the map space parameters; whether the registration and error correction of the graphics and the projection parameters are correct; whether the merger and division of the uranium thematic layers are reasonable, and whether there are missing items or redundant items; whether the map content is consistent with reality; check the topological relationship between the surface file and the line file; check the accuracy of the division and spatial distribution of uranium mineralization and other mineral information types; whether the map finishing meets the requirements of the uranium geological mapping specifications.

[0067] Step 5: Database construction

[0068] Step 5.1, database structure establishment

[0069] Data attribute structures are established for different layers in the drawing. This structure type is mainly established with reference to the "National Uranium Resource Potential Evaluation Data Model" to ensure the complete preservation of information data.

[0070] Step 5.2, attribute data entry and database check

[0071] After the attribute data structure of each layer is established, the corresponding attribute content is entered according to the requirements of different attribute fields. Attribute entry can be divided into manual entry and batch attribute or parameter hanging entry. Attributes can be entered in batches with the help of Section plug-in, but the premise is that each attribute ID must be unique. After all data attributes are entered, the database quality check is carried out, mainly checking the integrity, logic, accuracy and spatial positioning of the data to ensure that the data stored in the database is accurate.

[0072] Step 6: Prepare instructions and drawings for application

[0073] According to the mapping requirements of one map, one database and one description, map instructions are compiled to facilitate the sharing and use of maps by various users. The contents compiled mainly include the scope of mapping, the main work process, the content of the drawings, the amount of work completed and the quality of mapping, the mapping data and sources, the mapping principles and basis, the existing problems and the disposal status, etc. Finally, the digital maps and databases can be published, shared and used simultaneously.

[0074] Example

[0075] Taking the digital geological map of sandstone-type uranium deposits in the Bayingebi Basin as an example, the present invention provides a method for compiling a digital geological map of sandstone-type uranium deposits, which specifically includes the following steps:

[0076] Step 1: Collect, organize and analyze geological data.

[0077] Step 1.1, systematically collect data such as reports, literature, geological maps and databases of the Bayingobi Basin.

[0078] Comprehensively collect data on uranium geology, basic geology, hydrogeology, prospecting engineering and mineral resources in the Bayingebi Basin. Focus on collecting data on uranium geological exploration, radioactivity measurement, regional uranium mineralization laws, uranium resource survey and evaluation results, and uranium production area database since 2000. Merge and comprehensively organize the collected data by type.

[0079] Step 1.2: Organize and analyze the data.

[0080] Systematically organize, analyze, digest and absorb all kinds of collected data. Sort out the accuracy of the data, the degree of consistency between the data content and the current status of exploration and research, ensure the source and reliability of various geological data, and classify, proofread, integrate and merge the data according to the distribution of data within the basin.

[0081] Step 2: Regional geological background research and typical mineral deposit research.

[0082] Step 2.1, study of regional uranium mineralization geological background.

[0083] This paper analyzes the relationship between the geological structure, stratigraphic sedimentary structure and uranium ore in the strata in terms of time, space, material composition and tectonic environment in the Bayingebi Basin and surrounding areas, and explores the control of basin tectonic system, tectonic paleogeographic environment, sedimentary structure and sedimentary phase on uranium mineralization.

[0084] Step 2.2, study of typical mineral deposits.

[0085] Taking Celaomiao and Tamusu as typical uranium deposits, studies on uranium mineralization geological conditions and uranium mineralization geological characteristics were carried out respectively. It was determined that the Ingejing Depression and the NE-trending fault in the basin are the ore-controlling structures, the mapping target layer is the Bayingebi Formation of the Lower Cretaceous, the fan delta front subfacies sand-mud interlayer sedimentary structure controls the ore, and phreatic oxidation and interlayer oxidation are the main uranium mineralization processes.

[0086] Step 3: Data import and uranium geology special editing.

[0087] Step 3.1, data format unification and uranium geology standardization.

[0088] Set the mapping scope, coordinate system and projection parameters of the Bayingebi Basin. Convert all the various formats and types of geological data collected and sorted in step 1 into MapGIS data through a public exchange format (paper maps need to be scanned, mosaicked, calibrated, and vectorized). Perform registration, calibration, and projection transformation on the converted data to ensure that data of different precisions and scales can be projected and transformed to the corresponding accurate spatial positions in the Bayingebi Basin.

[0089] Step 3.2, uranium geology special editing.

[0090] According to the research results of step 2, carry out the editing of the uranium geological album. Simplify and merge the strata, highlight the Bayingebi Formation (K1b) of the Lower Cretaceous, the Lower Cretaceous and the Upper Cretaceous, and mark them with corresponding codes respectively; merge the Proterozoic into one layer, represented by Pt; simplify and merge the direct basement of the Paleozoic into units based on the system, and mark them with the codes of the corresponding periods; refine the Mesozoic and Cenozoic into units based on groups (groups). The mineralization structure layer highlights the basin basement uplift and depression belt structural division and the northeast fault formed since the deposition and diagenesis of the Bayingebi Formation; highlight the uranium-rich intermediate-acidic granite and volcanic rocks (uranium content greater than 10×10 -6 ) spatial distribution characteristics; there are two phreatic oxidation zone type uranium deposits and multiple uranium ore points and abnormal points in the basin. According to the standard, industrial uranium ore holes, mineralized holes, abnormal holes and non-ore holes should be distinguished, and mineral map layers should be established to highlight the spatial distribution relationship between uranium mineralization information and uranium-rich rock bodies and ore-controlling faults in the basin. After the geological topics are highlighted and merged, the point (.wt), line (.wl) and surface (.wp) files in the vectorized layer are edited one by one.

[0091] Step 3.3, drawing preparation.

[0092] According to the "National Uranium Resource Potential Evaluation Technology", "Regional Geological Map Legend" (GB / T 958) and "Regulations on the Preparation of Geological Maps of In-Situ Leachable Sandstone Type Uranium Deposits" (EJ / T 20003), eight parts of contents were compiled, including the plan geological map of the Bayingebi Basin, geological profile map, comprehensive stratigraphic column map, angular map, legend, scale, map name, and responsibility table.

[0093] Step 4: Check drawing content and quality.

[0094] The quality check of the sandstone-type uranium geological map of the Bayingebi Basin compiled in step 3.3 is carried out. The contents of the check mainly include whether the projection parameters of the map are consistent with the engineering projection parameters; whether the registration and error correction of the graphics and the projection parameters are correct; whether the merger and division of the uranium thematic layers are reasonable, and whether there are missing items or redundant items; whether the map content is consistent with reality; check the topological relationship between the surface file and the line file; check the accuracy of the division and spatial distribution of uranium mineralization and other mineral information types; and whether the map finishing meets the requirements of the uranium geological mapping specifications.

[0095] Step 5: Database construction.

[0096] Step 5.1, database structure is established.

[0097] Data attribute structures are established for different layers in the drawing. This structure type is mainly established with reference to the "National Uranium Resource Potential Evaluation Data Model" to ensure the complete preservation of information data.

[0098] Step 5.2, attribute data entry and database check.

[0099] After the attribute data structure of each layer is established, the corresponding attribute content is entered according to the requirements of different attribute fields. After all data attributes are entered, the database quality check is carried out, mainly checking the integrity, logic, accuracy and spatial positioning of the data to ensure that the data stored in the database is accurate.

[0100] Step 6: Prepare instructions and drawings for application of results.

[0101] According to the mapping requirements of one map, one database and one description, the description of the geological map of the sandstone-type uranium deposits in the Bayingebi Basin is compiled to facilitate the sharing and use of maps by various users. The contents of the description mainly include the scope of mapping, the main work process, the content of the map, the amount of work completed and the quality of mapping, the data and sources of mapping, the principles and basis of mapping, the existing problems and the disposal status, etc. Finally, the digital map and the database can be published, shared and used simultaneously.

[0102] The present invention has been described in detail above in conjunction with the embodiments, but the present invention is not limited to the above embodiments. For example, on the basis of the research on typical ore deposits and mineralization laws, a series of basic maps and result maps such as sandstone-type uranium ore construction structural map, lithofacies paleogeography map, rock geochemistry map, mineralization element map, prediction element map and prediction result map can be further compiled. Within the scope of knowledge possessed by ordinary technicians in this field, various changes can be made without departing from the purpose of the present invention. The contents not described in detail in the present invention can all adopt the existing technology.

Claims

1. A method for compiling a digital geological map of sandstone-type uranium deposits, characterized in that: The specific steps include: Step 1: Collection, organization and analysis of geological data; Step 1.1, systematically collect geological reports, literature, geological maps and database data within the mapping scope; Step 1.2, data collation and comprehensive analysis; Step 2: Regional geological background research and typical mineral deposit research; Step 2.1, study of regional uranium mineralization geological background; Step 2.2, typical mineral deposit research; Step 3, data import and uranium geology special editing; Step 3.1, data format unification and uranium geology standardization; Step 3.2, special topic editing of uranium geology; Step 3.3, drawing preparation; Step 4: Check the content and quality of the drawing; Check whether the projection parameters of each layer in the map are consistent with the engineering projection parameters and meet the requirements of the map space parameters; whether the registration and error correction of the graphics and the projection parameters are correct; whether the merger and division of the uranium mine thematic layers are reasonable, and whether there are missing items or redundant items; whether the map content is consistent with reality; check the topological relationship between the surface file and the line file; check the accuracy of the division and spatial distribution of uranium mineralization and other mineral information types; whether the map finishing meets the requirements of the uranium mine geological mapping specifications; Step 5: Database construction; Step 5.1, database structure establishment; Step 5.2, attribute data entry and database check; Step 6: Prepare the instructions and drawings for application; According to the mapping requirement of one map, one database and one description, a map description is compiled to facilitate the sharing and use of maps by various users; the compiled content mainly includes the scope of mapping, main work process, drawing content, completed workload and mapping quality, mapping data and sources, mapping principles and basis, existing problems and disposal status; digital maps and databases can be published, shared and used simultaneously.

2. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The step 1.1 is specifically as follows: comprehensively collect and organize geological data within the scope of mapping, and merge and comprehensively organize the collected data by type.

3. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 2, characterized in that: The geological data in step 1.1 include: uranium geology, basic geology, geophysics, geochemistry, remote sensing, hydrogeology, prospecting engineering, mineral data and in-situ leaching parameter data.

4. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The step 1.2 is specifically as follows: ascertain the source and reliability of the data, sort out the accuracy of the data, the degree of conformity of the data content with the current state of exploration and research, and the distribution of data within the scope of mapping, and then classify, proofread, integrate and merge the data.

5. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The step 2.1 is specifically as follows: analyzing the relationship between the geological structure, stratigraphic sedimentary structure and uranium ore in the strata in the mapping area and the tectonic environment in terms of time, space and material composition, and exploring the control of the basin tectonic system, tectonic paleogeographic environment, sedimentary structure and sedimentary phase on uranium mineralization.

6. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The step 2.2 is specifically as follows: conducting research on uranium mineralization geological conditions, analyzing uranium source conditions, structural conditions, lithology-facies conditions of prospecting target layers, paleoclimate conditions, hydrogeological conditions and epigenetic alteration conditions; conducting research on mineralization geological characteristics, analyzing the three-dimensional spatial distribution characteristics of the ore deposits, the material composition of the ore deposits, the mineralization geochemical characteristics, the mineralization geological effects, the geological age and the geological evolution stage; determining the target layers for mapping, distinguishing the basin basement structure and the cover structure, and determining the computer-identifiable structural, construction and epigenetic transformation control factors on uranium mineralization.

7. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The step 3.1 is specifically as follows: using MapGIS as the standard data format, the collected and organized ArcGIS, CAD, MapInfo, GeoMap and spreadsheet data are converted into MapGIS data through a public exchange format, and the converted data are subjected to standard frame registration, correction, and projection transformation to ensure that data of different accuracies and scales can be converted within the unified spatial range of mapping.

8. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The step 3.2 is specifically as follows: simplify and merge the strata, highlight the information of the target ore-bearing strata, refine the target ore-bearing strata into groups, groups or sections as units, and mark them with corresponding codes respectively; the ore-forming structural layer is divided into two types: faults and folds, highlighting the faults and fold structures formed since the deposition and diagenesis of the target ore-bearing strata inside the basin; the basement rock body, highlighting the spatial distribution characteristics of the uranium-rich body in the erosion source area of ​​the basin; Mineral map layers need to merge uranium mineralization types and overlay oil and gas fields, coal fields and other mineral information layers to highlight the spatial distribution relationship between uranium mineralization information and other mineral information, and mark them with corresponding sub-map codes; After highlighting and merging special layers, start editing the point, line and surface files in the vectorized layer one by one.

9. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The contents of the sandstone-type uranium ore geological map in step 3.3 include: a plan geological map, a geological cross-section map, a stratigraphic comprehensive column map, an angular map, a legend, a linear scale, a map name and a responsibility table.

10. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The step 5.1 is specifically as follows: establishing data attribute structures for different layers in the drawing respectively to ensure the complete preservation of information data.

11. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The step 5.2 is specifically as follows: after the attribute data structure of each layer is established, the corresponding attribute content is entered according to the requirements of different attribute fields. After all data attributes are entered, a database quality check is carried out to ensure that the data stored in the database is accurate.

12. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The entry of attributes in step 5.2 is divided into manual entry and batch attribute or parameter hooking entry. Batch attribute entry can be assisted by Section plug-in.

13. The method for compiling a digital geological map of sandstone-type uranium deposits according to claim 1, characterized in that: The database quality check in step 5.2 includes: data integrity, logic, accuracy and spatial localization.