CN108228920A - A kind of sandstone-type uranium mineralization with respect soil element uranium exception screening technique - Google Patents
A kind of sandstone-type uranium mineralization with respect soil element uranium exception screening technique Download PDFInfo
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Abstract
The invention belongs to geologic prospect fields, and in particular to a kind of sandstone-type uranium mineralization with respect soil element uranium exception screening technique.Include the following steps：Step 1: exclude Landscape interference；Step 2: draw uranium element geochemical anomaly map；Step 3: obtain the uranium exceptions area for excluding mankind's activity interference；Step 4: obtain the uranium exceptions area after excluding landform interference；Step 5: obtain the uranium exceptions area for excluding geologic body interference；Step 6: the uranium exceptions area obtained in step 5 is classified.The present invention is by the screening anomaly flow of complete set, and the influence of the quick many-sided disturbing factor of removal, extraction ore deposit cause is abnormal, and advantageous foundation is provided for metallogenic prognosis work.
Description
Technical field
The invention belongs to geologic prospect fields, and in particular to a kind of sandstone-type uranium mineralization with respect soil element uranium exception screening technique.
Background technology
It is usually covered above sandstone-type uranium mineralization with respect by thicker Quaternary Strata, using soil geochemical prospecting extraction URANIUM DEPOSITS IN THE DEPTHization letter
Breath is one of main method of exploration of sandstone type uranium deposits.Majority is not that ore deposit causes exception in the element uranium exception usually extracted, former
Because being exactly that the uranium element from deep orebody is vulnerable to the influences of many factors when earth's surface is enriched with, including Landscape difference,
Earth's surface flowing water washes away, mankind's activity, geologic body difference etc..These factors can dramatically change uranium abnormal morphology, cause compared with
More false anomalies, if without objective screening anomaly, it can be to miner be looked for cause larger interference.
Invention content
The technical problem to be solved in the present invention is to provide a kind of sandstone-type uranium mineralization with respect soil element uranium exception screening technique, purposes
It is the screening anomaly flow by complete set, the influence of the quick many-sided disturbing factor of removal, extraction ore deposit cause is abnormal, is into ore deposit
Prediction work provides advantageous foundation.
In order to solve the above technical problems, a kind of screening technique of sandstone-type uranium mineralization with respect soil element uranium exception of the present invention, including
Following steps：
Step 1: excluding Landscape interference, research area's high-resolution remote sensing image is obtained, interprets surface vegetation type,
And combined ground sample record divides research area's Landscape, and the original discrete data of uranium is carried out between different landscape area
Leveling；
Step 2: the discrete data after leveling in step 1 is carried out gridding, threshold is set, with drawing uranium element
Geochemistry Abnormal Map；
Step 3: differentiating that non-ore deposit causes exceptions area caused by mankind's activity, the uranium exceptions area for excluding mankind's activity interference is obtained；
Step 4: non-ore deposit caused by differentiating landform in the uranium exceptions area for excluding mankind's activity interference obtained in step 3 causes
Exceptions area obtains the uranium exceptions area after excluding landform interference；
Step 5: non-ore deposit caused by differentiating geologic body in the uranium exceptions area after the exclusion landform of step 4 acquisition is interfered causes
Exceptions area；The uranium exceptions area obtained in step 4 and research area's geologic map are overlapped, if uranium exceptions area and geological epoch
Stratum before Neogene System overlaps, then this differentiates abnormal for the cause of non-ore deposit extremely, obtains the uranium exceptions area for excluding geologic body interference；
Step 6: the uranium exceptions area obtained in step 5 is classified.
In described three, the uranium exceptions area for excluding mankind's activity interference is obtained, is specially interpreted using high resolution image
Factory, village and the road information in area to be studied, factory and village are labeled as dot file on the diagram, pavement marker is line file,
Buffer zone analysis is made to point, line file respectively, the uranium exceptions area that buffering area and step 2 obtain is overlapped analysis, with buffering
The uranium exceptions area that area overlaps differentiates causes exceptions area for non-ore deposit.
In the step four, differentiate that the method that non-ore deposit caused by landform causes exceptions area is high by acquisition research area ground
Number of passes word model data calculate flow direction, flow, gradient index, surface drainage distribution map are established on this basis, to water-based line
File makees buffer zone analysis, and the uranium exceptions area obtained in water system buffering area and step 3 is overlapped analysis, will be delayed with water system
It rushes the consistent uranium exceptions area of area's distribution and extension direction and differentiates and cause exceptions area for non-ore deposit.
In the step six, for uranium exceptions area and geology ore factor are overlapped, grade scale is classification method：
It is abnormal labeled as A classes with the uranium exceptions area that 3 kinds of geology ore factor ranges overlap；With 1-2 kind geology ore factor range weights
The uranium exceptions area of conjunction is abnormal labeled as B classes；It is abnormal labeled as C classes with the uranium exceptions area that geology ore factor range does not overlap.
In the step six, geology ore factor includes ore-bearing formation sedimentary system, secondary grand recessed construction, oxidation-go back
Former three kinds of intermediate zone range.
The advantageous effects of the present invention are：A kind of sandstone-type uranium mineralization with respect soil element uranium exception screening proposed by the present invention
Method can largely reduce the influence of interference information, reject non-ore deposit and cause abnormal, and ore deposit range is looked in diminution, saving look for ore deposit into
This.
Specific embodiment
The present invention is described in further detail with reference to embodiment.
A kind of screening technique of sandstone-type uranium mineralization with respect soil element uranium exception, includes the following steps：
Step 1: excluding Landscape interference, research area's high-resolution remote sensing image is obtained, interprets surface vegetation type,
And combined ground sample record divides research area's Landscape, and the original discrete data of uranium is carried out between different landscape area
Leveling；
Step 2: the discrete data after leveling in step 1 is carried out gridding, twice of mean square deviation is added with uranium content mean value
The sum of as threshold, draw uranium element geochemical anomaly map；
Step 3: differentiating that non-ore deposit causes exceptions area caused by mankind's activity, the uranium exceptions area for excluding mankind's activity interference is obtained；
Specially using factory, village and the road information in high resolution image interpretation research area, factory and village are marked on the diagram
For dot file, pavement marker is line file, makees buffer zone analysis to point, line file respectively, and dot file buffering area radius is 800
Rice, line file buffering sector width is 100 meters, the uranium exceptions area that buffering area and step 2 obtain is overlapped analysis, with buffering
The uranium exceptions area that area overlaps differentiates causes exceptions area for non-ore deposit；
Step 4: non-ore deposit caused by differentiating landform in the uranium exceptions area for excluding mankind's activity interference obtained in step 3 causes
Exceptions area obtains the uranium exceptions area after excluding landform interference；Differentiate that the method that non-ore deposit caused by landform causes exceptions area is by obtaining
Research area ground elevation mathematical model (DEM) data are taken, flow direction, flow, gradient index are calculated in GIS software, it is basic herein
On establish surface drainage (including seasonal flowing water) distribution map, make buffer zone analysis to water-based line file, buffering sector width is
600 meters；The uranium exceptions area obtained in water system buffering area and step 3 is overlapped analysis, it will be with water system buffering area distribution
And the consistent uranium exceptions area in extension direction differentiates and causes exceptions area for non-ore deposit；
Step 5: non-ore deposit caused by differentiating geologic body in the uranium exceptions area after the exclusion landform of step 4 acquisition is interfered causes
Exceptions area；The uranium exceptions area obtained in step 4 and research area's geologic map are overlapped, if uranium exceptions area and geological epoch
Stratum before Neogene System overlaps, then this differentiates abnormal for the cause of non-ore deposit extremely, obtains the uranium exceptions area for excluding geologic body interference；
Step 6: the uranium exceptions area obtained in step 5 is classified；Uranium exceptions area and geology ore factor are carried out
Superposition, geology ore factor include ore-bearing formation sedimentary system, secondary grand recessed construction, three kinds of redox zone range, point
Grade standard be：It is abnormal labeled as A classes with the uranium exceptions area that 3 kinds of geology ore factor ranges overlap；It will into ore deposit with 1-2 kinds geology
The uranium exceptions area that plain range overlaps is abnormal labeled as B classes；C is labeled as with the uranium exceptions area that geology ore factor range does not overlap
Class is abnormal.
Claims (5)
1. a kind of screening technique of sandstone-type uranium mineralization with respect soil element uranium exception, it is characterised in that：Include the following steps：
Step 1: excluding Landscape interference, research area's high-resolution remote sensing image is obtained, interprets surface vegetation type, and tie
It closes ground sample record to divide research area's Landscape, the tune of the original discrete data of uranium is carried out between different landscape area
It is flat；
Step 2: the discrete data after leveling in step 1 is carried out gridding, threshold is set, it is geochemical to draw uranium element
Learn Abnormal Map；
Step 3: differentiating that non-ore deposit causes exceptions area caused by mankind's activity, the uranium exceptions area for excluding mankind's activity interference is obtained；
Step 4: non-ore deposit cause is abnormal caused by differentiating landform in the uranium exceptions area for excluding mankind's activity interference obtained in step 3
Area obtains the uranium exceptions area after excluding landform interference；
Step 5: non-ore deposit caused by differentiating geologic body in the uranium exceptions area after the exclusion landform of step 4 acquisition is interfered causes exception
Area；The uranium exceptions area obtained in step 4 and research area's geologic map be overlapped, if uranium exceptions area with geological epoch new
Stratum before nearly system overlaps, then the exception discriminating causes abnormal for non-ore deposit, the uranium exceptions area of acquisition exclusion geologic body interference；
Step 6: the uranium exceptions area obtained in step 5 is classified.
2. a kind of screening technique of sandstone-type uranium mineralization with respect soil element uranium exception according to claim 1, it is characterised in that：Institute
In three stated, the uranium exceptions area for excluding mankind's activity interference is obtained, the work in research area is specially interpreted using high resolution image
Factory, village and road information, on the diagram by factory and village labeled as dot file, pavement marker is line file, respectively to point, line
File makees buffer zone analysis, the uranium exceptions area that buffering area and step 2 obtain is overlapped analysis, the uranium overlapped with buffering area
Exceptions area differentiates causes exceptions area for non-ore deposit.
3. a kind of screening technique of sandstone-type uranium mineralization with respect soil element uranium exception according to claim 2, it is characterised in that：Institute
In the step of stating four, differentiate that the method that non-ore deposit caused by landform causes exceptions area is to study area's ground elevation mathematical model by acquisition
Data calculate flow direction, flow, gradient index, establish surface drainage distribution map on this basis, water-based line file is buffered
Area analyzes, and the uranium exceptions area obtained in water system buffering area and step 3 is overlapped analysis, will be distributed model with water system buffering area
It encloses and uranium exceptions area that extension direction is consistent differentiates and causes exceptions area for non-ore deposit.
4. a kind of screening technique of sandstone-type uranium mineralization with respect soil element uranium exception according to claim 3, it is characterised in that：Institute
In the step of stating six, for uranium exceptions area and geology ore factor are overlapped, grade scale is classification method：With 3 kinds of geology
The uranium exceptions area that ore factor range overlaps is abnormal labeled as A classes；The uranium overlapped with 1-2 kind geology ore factor ranges is abnormal
Area is abnormal labeled as B classes；It is abnormal labeled as C classes with the uranium exceptions area that geology ore factor range does not overlap.
5. a kind of screening technique of sandstone-type uranium mineralization with respect soil element uranium exception according to claim 4, it is characterised in that：Institute
In the step of stating six, geology ore factor includes ore-bearing formation sedimentary system, secondary grand recessed construction, redox zone model
Enclose three kinds.
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Cited By (2)
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| CN109669217A (en) * | 2018-12-24 | 2019-04-23 | 核工业北京地质研究院 | A kind of competent structure deformed area Prospecting Sandstone-type Uranium Deposits method |
| CN112379079A (en) * | 2020-10-27 | 2021-02-19 | 核工业北京地质研究院 | Deep sandstone-type uranium mineralization information analysis and extraction method |
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| CN112379079A (en) * | 2020-10-27 | 2021-02-19 | 核工业北京地质研究院 | Deep sandstone-type uranium mineralization information analysis and extraction method |
| CN112379079B (en) * | 2020-10-27 | 2023-01-24 | 核工业北京地质研究院 | Deep sandstone-type uranium mineralization information analysis and extraction method |
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