CN116165708A - Accurate positioning method for uranium-bearing ore-forming sand body with beneficial coverage area - Google Patents
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- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 53
- 239000004576 sand Substances 0.000 title claims abstract description 53
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical group [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000009286 beneficial effect Effects 0.000 title claims description 12
- 230000002349 favourable effect Effects 0.000 claims abstract description 78
- 238000005553 drilling Methods 0.000 claims abstract description 34
- 238000012216 screening Methods 0.000 claims abstract description 10
- 230000001502 supplementing effect Effects 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 claims description 31
- 230000015572 biosynthetic process Effects 0.000 claims description 19
- 238000011160 research Methods 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims description 12
- 230000008021 deposition Effects 0.000 claims description 12
- 238000011161 development Methods 0.000 claims description 11
- 238000005530 etching Methods 0.000 claims description 9
- 239000011229 interlayer Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 8
- 239000011707 mineral Substances 0.000 claims description 8
- 238000009933 burial Methods 0.000 claims description 7
- 238000002679 ablation Methods 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 208000035126 Facies Diseases 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000010438 granite Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000018109 developmental process Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 239000002366 mineral element Substances 0.000 description 3
- 240000000233 Melia azedarach Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
- G01V1/301—Analysis for determining seismic cross-sections or geostructures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
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Abstract
The invention belongs to the technical field of uranium deposit favorable sand body prediction, and particularly relates to an accurate positioning method of a uranium deposit favorable sand body, which comprises the following steps: step 1, collecting and analyzing data, and delineating important mine-searching basin sections and areas with larger potential; step 2, a target horizon which is favorable for prospecting is determined; step 3, supplementing and collecting drilling data of the target horizon which is determined in the drilling step 2 and is favorable for finding ores, and counting data of various ore control elements of the target horizon; step 4, drawing each ore control element drawing piece of the target horizon by utilizing Surfer software, and screening the most favorable ore forming interval of each element; and 5, sleeving and superposing various drawing pieces, and accurately positioning the uranium-bearing ore bodies. According to the invention, the most favorable ore forming intervals of the favorable ore forming elements are extracted to be sleeved and overlapped, so that the distribution characteristics of the favorable uranium ore forming sand bodies under the coverage area are accurately positioned, and favorable support is provided for subsequent ore finding work.
Description
Technical Field
The invention belongs to the technical field of uranium deposit favorable sand body prediction, and particularly relates to an accurate positioning method of uranium deposit favorable sand bodies with coverage areas.
Background
Sandstone-type uranium ores are important industrial uranium mineralization types in China, and along with the proposal of an energy-saving emission-reduction environment-friendly concept, it is important to provide economic and recoverable uranium ore resources to meet the development of military industry and nuclear power in China. Sandstone-type uranium ores are in comprehensive and rapid development stage due to the characteristics of shallow burial depth, easy exploitation, safety and environmental protection. In nineties of the last century, china has made great breakthroughs in basins such as Erdos, lian, songliao and Yili, so that extra-large uranium deposits such as soap moat, naling ditch, large camping, qianjiao shop and Mongolian Golgi are realized, a series of ore finding methods are formed, and sandstone uranium resource reserves in China are greatly enriched.
In recent years, along with the continuous deepening of the exploration degree of sandstone-type uranium ores, the fact that the ore formation mechanism of the sandstone-type uranium ores is mostly a composite cause is gradually recognized, but the positioning prediction technology of the favorable ore formation sand bodies is still a key technology for ore finding, so that a technical method with a coverage area favorable for the accurate positioning of the ore formation sand bodies is required to be designed and used for perfecting the technical problem of poor prediction accuracy in the existing positioning prediction work of the ore formation sand bodies.
Disclosure of Invention
The invention designs an accurate positioning method for a uranium-bearing ore-forming sand body with an advantageous coverage area, which is used for solving the technical problem that the positioning accuracy is poor due to a plurality of complex causes of an ore-forming mechanism of uranium ores in the existing ore-forming sand body positioning and predicting work.
The technical scheme of the invention is as follows:
a precise positioning method for uranium-bearing ore bodies with favorable coverage areas comprises the following steps:
step 1, collecting and analyzing data, and delineating important mine-searching basin sections and areas with larger potential;
step 1.1, preliminarily encircling a major basin section;
step 1.2, on the basis of the key mine-finding basin section defined in the step 1.1, defining key areas;
step 2, determining a target horizon favorable for prospecting;
step 3, supplementing and collecting drilling data of the target horizon which is determined in the drilling step 2 and is favorable for finding ores, and counting data of various ore control elements of the target horizon;
step 4, drawing each ore control element drawing piece of the target horizon by utilizing Surfer software, and screening the most favorable ore forming interval of each element;
and 5, sleeving and superposing various drawing pieces, and accurately positioning the beneficial uranium ore forming sand body.
Step 1.1, preliminary circle focus basin section includes: collecting image-text data such as regional geology, geostructural evolution and the like of a research basin, defining factors such as basin type, sedimentary coating, basement lithology, etching source region conditions and the like, and defining a key mining basin section with larger potential according to a primary construction unit:
the extrusion basin type primary construction unit takes a mountain front slope belt and a split basin type primary construction unit as a first choice, and takes a bulge area as a first choice;
the deposited cap layer is advantageous in developing an interlayer oxide tape and has a thickness of < 1000 m;
the lithology granite in the source erosion area is the first choice, the volcaniclastic rock and the acidic volcanic rock are the second choice, and the uranium content is more than or equal to 5ppm.
Step 1.2 is based on the key mining basin section outlined in step 1.1, and the key region is outlined, and comprises the following steps: the geological, structural and seismic data of the basin segment are collected and arranged in an emphasized mode, elements such as a basin segment deposition system, ancient climate evolution, object source-uranium source supply conditions and the like are researched and analyzed, secondary structural units are divided, and a key area favorable for ore formation is further defined according to the secondary structural units: defining a favorable mineralisation geologic time range in a vertical direction according to the favorable deposit cap layer thickness in step 1.1; integrating the prior research data in the earlier stage, analyzing the ancient climate and deposition evolution characteristics of the basin section, and determining that a semiarid-semiarid wet climatic condition is adopted in the vertical direction, and a deposition system is adopted as an advantage; the two-stage construction unit is used as a unit to transversely ensure that the supply of the material source and the uranium source is sufficient, and the material source area, the etching source area or the structural ablation area is close to the material source area, the etching source area or the structural ablation area, so that the important area for ore formation is comprehensively researched and judged.
Step 2, determining a favorable prospecting target horizon comprises the following steps:
step 2.1, collecting drilling data in the range of the key areas defined in the step 1, wherein the collected drilling data cover the data such as the seismic profile of the whole area;
2.2, in the vertical direction, utilizing drilling data to establish a plurality of typical single-well histograms, combining the data such as seismic profile and the like on the area to determine the stratum thickness, and establishing a comprehensive histogram of the key area; on the basis, the lithology structures between various layers and in the layer group are analyzed, and the stratum mainly with a mud-sand-mud structure with stable development is selected by combining the prior research results and preferring the lithology combination in the vertical direction;
step 2.3, drawing a well connecting section transversely, further dividing elements such as a sedimentary facies zone, sand development, an interlayer oxidation zone and the like by taking a layer group as a unit, and determining plains and subphases of a plains of a triangular river channel with a plait river phase and a curved river subphase; the thickness of the multilayer sand body is 5-15m, and the continuity is good; the layer with large interlayer oxidation zone development scale is an advantageous target layer.
Step 3, supplementing and collecting drilling data of the target horizon which is determined in the drilling step 2 and is favorable for finding ores, and counting data of various ore control elements of the target horizon;
step 3.1, determining the boundary of the key region outlined in the step 1.2, editing a geological map of the key region by using Mapgis software on the basis of the research result of the former, and manufacturing a coordinate table of inflection points of the boundary of the key region; step 3.2, counting the formation thickness, the bottom plate burial depth, the sand thickness, the sand-to-ground ratio, the oxide sand thickness, the reduction sand thickness and other ore control element data of the favorable ore formation target layer and the drilling coordinates thereof which are obtained in the step 2 according to a large amount of drilling data, and counting and sorting the ore control element data into a table form;
and 3.3, on the basis of the step, merging the boundary coordinates of the key areas with the statistical data of the mineral control elements in the step 3.2 respectively, assigning the boundary coordinates of the key areas to 0, and arranging the boundary coordinates into independent tables for standby according to the mineral control elements.
The step 4: drawing each ore control element drawing piece of the target horizon by utilizing Surfer software, and screening the most favorable ore forming interval of each element;
step 4.1, importing the data in the step 3.3 into software by utilizing Surfer software, and drawing a contour map of each element of the target horizon;
and 4.2, identifying the target layer phase mark by using drilling data, and modifying the deposition phase layout of the target layer.
Step 4.3, summarizing the threshold value of the favorable ore-forming element interval of the typical sandstone-type uranium deposit according to the prior research data in the earlier stage, and defining the most favorable ore-forming interval of the favorable ore-forming element;
and 4.4, screening the most favorable ore forming interval of each element according to the standard in the step 4.2, wherein the stratum thickness is more than 80m, the bottom plate burial depth is less than 1000m, the sand thickness is more than or equal to 60m, the sand-to-ground ratio is more than or equal to 0.5, the optimal reduction sand body is 10-50m, and the optimal reduction sand body is 50-70m, and the thickness of the oxidized sand body is 10-40m.
Step 5: the various drawing pieces are sleeved and overlapped, and the uranium-bearing ore sand bodies are positioned accurately;
step 5.1, performing nesting and stacking on the element graphs of the most favorable ore formation region screened in the step 4.3 in a sedimentary phase base graph by using Mapgis or CorelDRAW software;
and 5.2, on the basis of the step 5.1, defining an area which is overlapped by more than 80% as the most favorable ore-forming sand body according to the overlapping probability of the beneficial elements, and overlapping the area by 65-80%.
The invention has the beneficial effects that:
the method integrates and counts a large amount of drilling data to compile series of favorable mineral elements on the basis of deep analysis of key basin sections (areas), extracts the most favorable mineral forming areas of each favorable mineral element to perform nesting and stacking, thereby accurately positioning the distribution characteristics of favorable uranium-bearing ore sand bodies under the coverage area and providing favorable support for subsequent mineral exploration.
Under the theoretical guidance of layer sequence stratigraphy, sedimentary petrography, uranium ore geology, lithology geochemistry characteristics and the like, a series of favorable mineral element graphs are compiled by using a large amount of drilling data, the data sources are real and reliable, and the graphs have higher accuracy. In addition, according to the most favorable ore-forming element intervals divided by the prior art data, the compiled drawing pieces are screened and overlapped, so that the distribution condition of favorable ore-forming sand bodies is determined. The method has practical guiding significance on the definition of the favorable ore-forming sand body, has higher accuracy, can directly guide the actual ore-finding work, and solves the key technology of positioning and predicting the favorable ore-forming sand body; in addition, the method can also be used for evaluating the uranium ore potential and predicting the resource quantity of a certain area.
Drawings
FIG. 1 is a flow chart of a method for precisely positioning uranium-bearing ore bodies with advantageous coverage areas designed by the invention;
FIG. 2 is a plot of the positioning of a beneficial ore-forming sand in an embodiment of the present invention.
Detailed Description
The following describes in detail a method for precisely positioning uranium-bearing ore bodies with advantageous coverage according to the present invention, with reference to the accompanying drawings and examples.
A precise positioning method for uranium-bearing ore bodies with favorable coverage areas comprises the following steps:
step 1, collecting and analyzing data, and delineating important mine-searching basin sections and areas with larger potential;
step 1.1, preliminarily encircling a major basin section;
step 1.2, on the basis of the key mine-finding basin section defined in the step 1.1, defining key areas;
step 2, determining a target horizon favorable for prospecting;
step 3, supplementing and collecting drilling data of the target horizon which is determined in the drilling step 2 and is favorable for finding ores, and counting data of various ore control elements of the target horizon;
step 4, drawing each ore control element drawing piece of the target horizon by utilizing Surfer software, and screening the most favorable ore forming interval of each element;
and 5, sleeving and superposing various drawing pieces, and accurately positioning the beneficial uranium ore forming sand body.
Step 1.1, preliminary circle focus basin section includes: collecting image-text data such as regional geology, geostructural evolution and the like of a research basin, defining factors such as basin type, sedimentary coating, basement lithology, etching source region conditions and the like, and defining a key mining basin section with larger potential according to a primary construction unit:
the extrusion basin type primary construction unit takes a mountain front slope belt and a split basin type primary construction unit as a first choice, and takes a bulge area as a first choice;
the deposited cap layer is advantageous in developing an interlayer oxide tape and has a thickness of < 1000 m;
the lithology granite in the source erosion area is the first choice, the volcaniclastic rock and the acidic volcanic rock are the second choice, and the uranium content is more than or equal to 5ppm.
Step 1.2 is based on the key mining basin section outlined in step 1.1, and the key region is outlined, and comprises the following steps: the geological, structural and seismic data of the basin segment are collected and arranged in an emphasized mode, elements such as a basin segment deposition system, ancient climate evolution, object source-uranium source supply conditions and the like are researched and analyzed, secondary structural units are divided, and a key area favorable for ore formation is further defined according to the secondary structural units: defining a favorable mineralisation geologic time range in a vertical direction according to the favorable deposit cap layer thickness in step 1.1; integrating the prior research data in the earlier stage, analyzing the ancient climate and deposition evolution characteristics of the basin section, and determining that a semiarid-semiarid wet climatic condition is adopted in the vertical direction, and a deposition system is adopted as an advantage; the two-stage construction unit is used as a unit to transversely ensure that the supply of the material source and the uranium source is sufficient, and the material source area, the etching source area or the structural ablation area is close to the material source area, the etching source area or the structural ablation area, so that the important area for ore formation is comprehensively researched and judged.
Step 2, determining a favorable prospecting target horizon comprises the following steps:
step 2.1, collecting drilling data in the range of the key areas defined in the step 1, wherein the collected drilling data cover the data such as the seismic profile of the whole area;
2.2, in the vertical direction, utilizing drilling data to establish a plurality of typical single-well histograms, combining the data such as seismic profile and the like on the area to determine the stratum thickness, and establishing a comprehensive histogram of the key area; on the basis, the lithology structures between various layers and in the layer group are analyzed, and the stratum mainly with a mud-sand-mud structure with stable development is selected by combining the prior research results and preferring the lithology combination in the vertical direction;
step 2.3, drawing a well connecting section transversely, further dividing elements such as a sedimentary facies zone, sand development, an interlayer oxidation zone and the like by taking a layer group as a unit, and determining plains and subphases of a plains of a triangular river channel with a plait river phase and a curved river subphase; the thickness of the multilayer sand body is 5-15m, and the continuity is good; the layer with large interlayer oxidation zone development scale is an advantageous target layer.
Step 3, supplementing and collecting drilling data of the target horizon which is determined in the drilling step 2 and is favorable for finding ores, and counting data of various ore control elements of the target horizon;
step 3.1, determining the boundary of the key region outlined in the step 1.2, editing a geological map of the key region by using Mapgis software on the basis of the research result of the former, and manufacturing a coordinate table of inflection points of the boundary of the key region; step 3.2, counting the formation thickness, the bottom plate burial depth, the sand thickness, the sand-to-ground ratio, the oxide sand thickness, the reduction sand thickness and other ore control element data of the favorable ore formation target layer and the drilling coordinates thereof which are obtained in the step 2 according to a large amount of drilling data, and counting and sorting the ore control element data into a table form;
and 3.3, on the basis of the step, merging the boundary coordinates of the key areas with the statistical data of the mineral control elements in the step 3.2 respectively, assigning the boundary coordinates of the key areas to 0, and arranging the boundary coordinates into independent tables for standby according to the mineral control elements.
The step 4: drawing each ore control element drawing piece of the target horizon by utilizing Surfer software, and screening the most favorable ore forming interval of each element;
step 4.1, importing the data in the step 3.3 into software by utilizing Surfer software, and drawing a contour map of each element of the target horizon;
and 4.2, identifying the target layer phase mark by using drilling data, and modifying the deposition phase layout of the target layer.
Step 4.3, summarizing the threshold value of the favorable ore-forming element interval of the typical sandstone-type uranium deposit according to the prior research data in the earlier stage, and defining the most favorable ore-forming interval of the favorable ore-forming element;
and 4.4, screening the most favorable ore forming interval of each element according to the standard in the step 4.2, wherein the stratum thickness is more than 80m, the bottom plate burial depth is less than 1000m, the sand thickness is more than or equal to 60m, the sand-to-ground ratio is more than or equal to 0.5, the optimal reduction sand body is 10-50m, and the optimal reduction sand body is 50-70m, and the thickness of the oxidized sand body is 10-40m.
Step 5: the various drawing pieces are sleeved and overlapped, and the uranium-bearing ore sand bodies are positioned accurately;
step 5.1, performing nesting and stacking on the element graphs of the most favorable ore formation region screened in the step 4.3 in a sedimentary phase base graph by using Mapgis or CorelDRAW software;
and 5.2, on the basis of the step 5.1, defining an area which is overlapped by more than 80% as the most favorable ore-forming sand body according to the overlapping probability of the beneficial elements, and overlapping the area by 65-80%.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the above examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. The accurate positioning method of the uranium-bearing ore body with the beneficial coverage area is characterized by comprising the following steps of:
step 1, collecting and analyzing data, and delineating important mine-searching basin sections and areas with larger potential;
step 1.1, preliminarily encircling a major basin section;
step 1.2, on the basis of the key mine-finding basin section defined in the step 1.1, defining key areas;
step 2, determining a target horizon favorable for prospecting;
step 3, supplementing and collecting drilling data of the target horizon which is determined in the drilling step 2 and is favorable for finding ores, and counting data of various ore control elements of the target horizon;
step 4, drawing each ore control element drawing piece of the target horizon by utilizing Surfer software, and screening the most favorable ore forming interval of each element;
and 5, sleeving and superposing various drawing pieces, and accurately positioning the beneficial uranium ore forming sand body.
2. The method for precisely positioning the uranium-bearing ore body with favorable coverage according to claim 1, wherein: step 1.1, preliminary circle focus basin section includes: collecting image-text data such as regional geology, geostructural evolution and the like of a research basin, defining factors such as basin type, sedimentary coating, basement lithology, etching source region conditions and the like, and defining a key mining basin section with larger potential according to a primary construction unit:
the extrusion basin type primary construction unit takes a mountain front slope belt and a split basin type primary construction unit as a first choice, and takes a bulge area as a first choice;
the deposited cap layer is advantageous in developing an interlayer oxide tape and has a thickness of < 1000 m;
the lithology granite in the source erosion area is the first choice, the volcaniclastic rock and the acidic volcanic rock are the second choice, and the uranium content is more than or equal to 5ppm.
3. The method for precisely positioning the uranium-bearing ore body with favorable coverage according to claim 2, wherein: step 1.2 is based on the key mining basin section outlined in step 1.1, and the key region is outlined, and comprises the following steps: the geological, structural and seismic data of the basin segment are collected and arranged in an emphasized mode, elements such as a basin segment deposition system, ancient climate evolution, object source-uranium source supply conditions and the like are researched and analyzed, secondary structural units are divided, and a key area favorable for ore formation is further defined according to the secondary structural units: defining a favorable mineralisation geologic time range in a vertical direction according to the favorable deposit cap layer thickness in step 1.1; integrating the prior research data in the earlier stage, analyzing the ancient climate and deposition evolution characteristics of the basin section, and determining that a semiarid-semiarid wet climatic condition is adopted in the vertical direction, and a deposition system is adopted as an advantage; the two-stage construction unit is used as a unit to transversely ensure that the supply of the material source and the uranium source is sufficient, and the material source area, the etching source area or the structural ablation area is close to the material source area, the etching source area or the structural ablation area, so that the important area for ore formation is comprehensively researched and judged.
4. A method of precisely locating a uranium ore body having a beneficial footprint as claimed in claim 3, wherein: step 2, determining a favorable prospecting target horizon comprises the following steps:
step 2.1, collecting drilling data in the range of the key areas defined in the step 1, wherein the collected drilling data cover the data such as the seismic profile of the whole area;
2.2, in the vertical direction, utilizing drilling data to establish a plurality of typical single-well histograms, combining the data such as seismic profile and the like on the area to determine the stratum thickness, and establishing a comprehensive histogram of the key area; on the basis, the lithology structures between various layers and in the layer group are analyzed, and the stratum mainly with a mud-sand-mud structure with stable development is selected by combining the prior research results and preferring the lithology combination in the vertical direction;
step 2.3, drawing a well connecting section transversely, further dividing elements such as a sedimentary facies zone, sand development, an interlayer oxidation zone and the like by taking a layer group as a unit, and determining plains and subphases of a plains of a triangular river channel with a plait river phase and a curved river subphase; the thickness of the multilayer sand body is 5-15m, and the continuity is good; the layer with large interlayer oxidation zone development scale is an advantageous target layer.
5. The method for precisely positioning the uranium ore body covered with favorable uranium according to claim 4, wherein: step 3, supplementing and collecting drilling data of the target horizon which is determined in the drilling step 2 and is favorable for finding ores, and counting data of various ore control elements of the target horizon;
step 3.1, determining the boundary of the key region outlined in the step 1.2, editing a geological map of the key region by using Mapgis software on the basis of the research result of the former, and manufacturing a coordinate table of inflection points of the boundary of the key region;
step 3.2, counting the formation thickness, the bottom plate burial depth, the sand thickness, the sand-to-ground ratio, the oxide sand thickness, the reduction sand thickness and other ore control element data of the favorable ore formation target layer and the drilling coordinates thereof which are obtained in the step 2 according to a large amount of drilling data, and counting and sorting the ore control element data into a table form;
and 3.3, on the basis of the step, merging the boundary coordinates of the key areas with the statistical data of the mineral control elements in the step 3.2 respectively, assigning the boundary coordinates of the key areas to 0, and arranging the boundary coordinates into independent tables for standby according to the mineral control elements.
6. The method for precisely positioning the uranium ore body covered with favorable uranium according to claim 5, wherein: the step 4: drawing each ore control element drawing piece of the target horizon by utilizing Surfer software, and screening the most favorable ore forming interval of each element;
step 4.1, importing the data in the step 3.3 into software by utilizing Surfer software, and drawing a contour map of each element of the target horizon;
and 4.2, identifying the target layer phase mark by using drilling data, and modifying the deposition phase layout of the target layer.
Step 4.3, summarizing the threshold value of the favorable ore-forming element interval of the typical sandstone-type uranium deposit according to the prior research data in the earlier stage, and defining the most favorable ore-forming interval of the favorable ore-forming element;
and 4.4, screening the most favorable ore forming interval of each element according to the standard in the step 4.2, wherein the stratum thickness is more than 80m, the bottom plate burial depth is less than 1000m, the sand thickness is more than or equal to 60m, the sand-to-ground ratio is more than or equal to 0.5, the optimal reduction sand body is 10-50m, and the optimal reduction sand body is 50-70m, and the thickness of the oxidized sand body is 10-40m.
7. The method for precisely positioning the uranium ore body covered with favorable uranium according to claim 5, wherein: step 5: the various drawing pieces are sleeved and overlapped, and the uranium-bearing ore sand bodies are positioned accurately;
step 5.1, performing nesting and stacking on the element graphs of the most favorable ore formation region screened in the step 4.3 in a sedimentary phase base graph by using Mapgis or CorelDRAW software;
and 5.2, on the basis of the step 5.1, defining an area which is overlapped by more than 80% as the most favorable ore-forming sand body according to the overlapping probability of the beneficial elements, and overlapping the area by 65-80%.
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| CN117449842A (en) * | 2023-11-06 | 2024-01-26 | 核工业二0三研究所 | Method for dividing chalk-based stratum of target layer for producing uranium in huge thickness |
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| CN117449842A (en) * | 2023-11-06 | 2024-01-26 | 核工业二0三研究所 | Method for dividing chalk-based stratum of target layer for producing uranium in huge thickness |
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