CN104076393B - A kind of granite type U-ore lies concealed ore-forming structure band recognition methods - Google Patents
A kind of granite type U-ore lies concealed ore-forming structure band recognition methods Download PDFInfo
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Abstract
The present invention relates to a kind of geological mapping method, specifically disclose a kind of granite type U-ore and lie concealed ore-forming structure band recognition methods, including step 1, make large scale remote sensing structure explanation figure；Step 2, the structural altered zone A for being conducive into ore deposit is chosen on large scale remote sensing structure explanation figure；Step 3, the structural altered zone B that chemical probing information obtains being conducive into ore deposit is extracted；Step 4, extracts physical detection information obtains being conducive into the structural altered zone C of ore deposit；Step 5, it is determined that it is preferred that into ore deposit target area.The present invention combines geology, physics, chemistry, remote sensing technique, can accurately identify uranium deep into the favourable section of ore deposit, be that Prospecting For Uranium and preferred prediction work provide foundation.
Description
Technical field
The present invention relates to a kind of geological mapping method, and in particular to a kind of granite type U-ore lies concealed the identification of ore-forming structure band
Method.
Background technology
Granite type U-ore is one of four major types of China's uranium ore, for Uranium Ore Deposits In Granitoid, and only rich uranium granite is
Inadequate, structural altered zone plays appearance ore deposit in granite mesothermal gold deposits and leads ore deposit effect, can provide passage for the migration of ore deposit liquid,
Place can be provided for enrichment of ore-forming again, while being the concentrated expression of information of mineralization again.Ore-forming structure research is to understanding into ore deposit
It is significant to the control action of the migration of ore deposit liquid, enrichment discipline that construction forms mechanical mechanism and construction.Ore-forming structure alteration
Band is a part for structural altered zone, and how being recognized in numerous structural altered zones, detecting ore-forming structure alteration zone is on face
Look for the key technology of ore deposit.Therefore the research of ore-forming structure alteration zone is to looking for ore deposit to have directive significance.
Prior art is more single to the identification of granite type U-ore ore-forming structure band, detection means.Southern Granite Region
With a varied topography, vegetation is luxuriant, and the identification of ore-forming structure band is main to be aided with other radioactivity survey methods based on gamma-spectrometry,
This is good to the effect for finding superficial part ore-forming structure band, is but difficult reflection deep ore-forming structure band.The difficulty of present deep prospecting is got over
Come bigger, the distinguishing mark for setting up ore-forming structure particularly deep ore-forming structure is most important to finding granite type U-ore.Cause
This studies ground-thing-change-distant method, it is necessary to further deepen, and selects a set of effective ways group for deep ore-forming structure band
Close.
The content of the invention
Ore-forming structure band recognition methods is lain concealed the technical problem to be solved in the present invention is to provide a kind of granite type U-ore, should
Method can reach higher recognition accuracy to uranium deep ore-forming structure band.
In order to solve the above technical problems, technical scheme provided by the present invention is：
A kind of granite type U-ore lies concealed ore-forming structure band recognition methods, and it comprises the following steps：
Step (1), makes large scale remote sensing structure explanation figure；
Step (2), chooses the structural altered zone A for being conducive into ore deposit on large scale remote sensing structure explanation figure；
Step (3), extracts the structural altered zone B that chemical probing information obtains being conducive into ore deposit；
Step (4), extracts physical detection information obtains being conducive into the structural altered zone C of ore deposit；
Step (5), it is determined that it is preferred that into ore deposit target area.
Described step (1) includes
(1.1) rift structure remote Sensing Interpretation mark is set up on remote sensing image；
(1.2) rift structure remote Sensing Interpretation mark is marked on remote sensing image, obtains large scale Remote Sensing Structural Interpretation
Figure.
Described rift structure remote Sensing Interpretation mark includes：Negative land form, linear pattern cheuch, the linear tone of the linear alignment are different
Normal band, the linear negative land form being discontinuously distributed.
Being conducive into the structural altered zone A of ore deposit in described step (2) includes：1. multigroup rift structure intersection on region
Position, and ore-forming structure band is based on a property turned round, connected region ore-controlling structure；2. position is developed in magmatic activity of many phases time, especially
It is the development such as late period intermediate-basic dike, granitello location；3. hydrothermal alteration development location, including ore deposit early stage muscovitization,
The line style alteration such as the face type alteration such as alkali explanation, sericitization and metallogenic period silication, hematization, pyritization, atropurpureus fluorite
Develop location；4. different types of metallogenetic structure surface development position, such as different lithology contact site, structural altered zone intersect compound
Position.
Described step (3) includes
(3.1) chemical probing workspace is disposed on the large scale remote sensing structure explanation figure that step (1) is obtained, including：
1. area is larger, the preferable uranium component of continuity, soil thermoluminescence exceptions area；2. fit and the uranium component of progressively concentration divide extremely
Cloth area and the abnormal concentration center of stronger uranium component；3. U, Mo, Be component combination are abnormal corresponding with deep component in fault structure zone compound
Region；
(3.2) the U components isogram, Be components isogram, Mo components for drawing chemical probing workspace respectively are equivalent
Line chart, soil thermoluminescence isogram, the abnormal area in the drawing of gained are chosen for being conducive into the structural altered zone of ore deposit
B。
Described step (4) includes
(4.1) physical detecting workspace is disposed on the large scale remote sensing structure explanation figure that step (1) is obtained, including：
There are a large amount of mineralization anomaly points, but known structural altered zone is less, and extend spread region in confused situation to deep；
(4.2) Audio Magnetotelluric Souding data and ground high-precision magnetic survey data are gathered on physical detecting workspace；
According to underground medium resistivity distribution characteristics after Audio Magnetotelluric Souding inverting and earth's surface magnetic signature, combined high precision magnetic survey
The value that curve occurs is abnormal, and delineation is conducive into the structural altered zone C of ore deposit.
Described step (5) includes
The construction for being conducive into ore deposit that the structural altered zone A for being conducive into ore deposit that step (2) is obtained, step (3) are obtained
The structural altered zone C for being conducive into ore deposit that alteration zone B and step (4) are obtained is respectively in large scale remote sensing structure explanation figure subscript
Go out, collectively constitute and preferably lie concealed ore-forming structure band into ore deposit target area, i.e. granite type U-ore.
The advantageous effects of the present invention are：
A kind of granite type U-ore provided by the present invention lie concealed ore-forming structure band recognition methods by by geology, physics,
Chemistry, remote sensing technique combination, can accurately identify uranium deep into the favourable section of ore deposit, be that Prospecting For Uranium and preferred prediction work are provided
Foundation.
Embodiment
The present invention is described in further detail with reference to embodiment.
The application region of the present embodiment is Chinese all Guangnan length rows-school col section (hereinafter referred to as " local area ").
A kind of granite type U-ore provided by the present invention is lain concealed ore-forming structure band recognition methods and comprised the following steps：
Step (1), makes large scale remote sensing structure explanation figure.
(1.1) rift structure remote Sensing Interpretation mark is set up on remote sensing image；
Using French Pleiades-1 satellite remote-sensing images, by obtaining the Structural Characteristics of Cenozioc Faulted Structure of atural object, detection of run-out structure
Make remote Sensing Interpretation mark.The Main Fracture Structures of local area have east northeast to~three groups of east northeast east orientation, northern west and nearly north-south.By
Different in the character of fracture structure of each side, they also show different features on remote sensing image.Nearly north-south fracture structure
Make remote Sensing Interpretation and be masked as more hidden linear character, and the negative land form of the more wide slow the linear alignment of tool；East northeast to~north
East orientation rift structure remote Sensing Interpretation is masked as linear pattern cheuch, linear tonal anomaly band, with obvious linear image feature；
Northern west rift structure remote Sensing Interpretation is masked as deep big linear pattern cheuch or the linear negative land form being discontinuously distributed.
(1.2) rift structure remote Sensing Interpretation mark is marked on remote sensing image, obtains large scale Remote Sensing Structural Interpretation
Figure.
Rift structure remote Sensing Interpretation mark obtained above is marked on remote sensing image, complete the local area whole district 1:
25000 and local area east 1：10000 Remote Sensing Structural Interpretation figure.
Step (2), chooses the structural altered zone A for being conducive into ore deposit on large scale remote sensing structure explanation figure.
Being conducive into the structural altered zone A of ore deposit includes：1. multigroup rift structure intersection part on region, and ore-forming structure band
Based on a property turned round, connected region ore-controlling structure；2. position, particularly late period mafic rocks are developed in magmatic activity of many phases time
Arteries and veins, granitello etc. develop location；3. location, including ore deposit early stage muscovitization, alkali explanation, sericitization etc. are developed in hydrothermal alteration
Location is developed in the line style alteration such as face type alteration and metallogenic period silication, hematization, pyritization, atropurpureus fluorite；4. it is different
The metallogenetic structure surface development position of type, such as different lithology contact site, structural altered zone intersect compound position.
Long row's section of local area is located at cotton hole mineral deposit south, and intersects with the fracture of oily hole and be combined.Main ore bearing structure band
There are a bands, b bands, c bands.A bands are the important depositing ore structure of local area, control You Dong mineral deposits and numerous abnormity points, a is with interior visible silicon
Change kataclastics, fractured granites, siliceous arteries and veins and intermediate-basic dike, and see obvious uranium ore in You Dong mineral deposits, the band of You Dong-Tuo Tong ridges one
Change.B bands, c bands south construction are larger, hydrothermal alteration development.Field observation is visible, and b bands, c band structural belts south are along depth
Ditch spread, and extend farther out.The visible obvious siliceous skeleton in b bands southern areas, it is broken by siliceous arteries and veins, silication kataclastics and strong alteration
Granite composition is split, obvious celadon hydromica and bronzing hematization alteration is seen；Though the southern field of c bands is not observed bright
Aobvious hydrothermal alteration, rarely seen a small amount of siliceous scun and local alteration, but c bands have branch buckling phenomenon along walking tendency.
The school col section of local area is located at water stone ore bed the north, positioned at oily hole fracture belt and cotton hole fracture belt clamp area.
This area's development has the nearly north-south structures alteration zones such as d bands, e bands, and alteration zone has certain scale.This area's hydrothermal alteration hair
Educate, the common celadon hydromicazation of earth's surface, bronzing hematization, locally see the siliceous arteries and veins of width about 1m flesh pinks.
Therefore, it is the structural altered zone A for being conducive into ore deposit to choose a bands, b bands, c bands, d bands, e bands.
Step (3), extracts the structural altered zone B that chemical probing information obtains being conducive into ore deposit.
(3.1) chemical probing workspace is disposed on the large scale remote sensing structure explanation figure that step (1) is obtained, including：
1. area is larger, the preferable uranium component of continuity, soil thermoluminescence exceptions area；2. fit and the uranium component of progressively concentration divide extremely
Cloth area and the abnormal concentration center of stronger uranium component；3. U, Mo, Be component combination are abnormal corresponding with deep component in fault structure zone compound
Region；
The long section of arranging of local area intersects with the oily hole fracture belt of ore bearing structure, and western part of long row's section and pool col section has bright
Aobvious chemical probing is abnormal.School col section is located at cotton and cheated between fracture belt and oily hole fracture belt, magmatic activity of many phases time hair
Educate, develop a plurality of approximately EW lamprophyre veins and Granodiorite mass, and development alkali metasomatic rock；Learn pool col section east visible substantially
Chemical probing it is abnormal.
Therefore, in the first chemical probing workspace of western deployment of long row's section and pool col section, by line-spacing 100m, point
Away from 20m samplings, 55 surveys line, 4817 measuring points are set altogether.The second chemical probing workspace is disposed learning pool col section east, is pressed
Line-spacing 100m, point need to set 46 surveys line, 7800 measuring points altogether away from 20m samplings.Sampled respectively on selected measuring point U,
The content information and thermoluminescence information of Mo, Be element.
(3.2) the U components isogram, Be components isogram, Mo components for drawing chemical probing workspace respectively are equivalent
Line chart, soil thermoluminescence isogram, the abnormal area in the drawing of gained are chosen for being conducive into the structural altered zone of ore deposit
B。
Released with Sufer software development U components isogram, Be components isogram, Mo components isogram and Soil Thermal
Light isogram.On U component isograms, using the U average contents of whole measuring points as background value, marked with background value plus 2 times
Quasi- variance sum determines the threshold value of U elements, and delineation is U exceptions areas more than the region of threshold value.Similarly, Be is drawn a circle to approve
Exceptions area, Mo exceptions areas, soil thermoluminescence exceptions area.
The ore bearing structure bands such as long row's section f bands, g bands, school col section h bands, i bands have obvious U, Mo, Be component group
The uranium component spatial abnormal feature mould that exception is clear, area is larger, have progressively concentration is closed in exception and soil thermoluminescence anomaly, abnormal belt
Formula and the abnormal concentration center of 3 uranium components, these positions are favourable into ore deposit location.
Therefore, it is the structural altered zone B for being conducive into ore deposit to choose f bands, g bands, h bands, i bands.
Step (4), extracts physical detection information obtains being conducive into the structural altered zone C of ore deposit.
(4.1) physical detecting workspace is disposed on the large scale remote sensing structure explanation figure that step (1) is obtained, including：
There are a large amount of mineralization anomaly points, but known structural altered zone is less, and extend spread region in confused situation to deep；
A large amount of abnormity points are had according to local area, but known structural altered zone is less, and it is in confused situation etc. to deep extension spread
Feature, designs 7 AMT surveys line and 7 high-precision magnetic survey lines altogether.High-precision magnetic survey line overall length 41.5km, point away from being measured by 10m,
4150 sampled points need to be set altogether；AMT survey line overall length 41.5km, put away from being measured by 20m, 2075 sampled points need to be set altogether.
(4.2) Audio Magnetotelluric Souding (AMT) data and ground high-precision magnetic survey are gathered on physical detecting workspace
Data；According to underground medium resistivity distribution characteristics after Audio Magnetotelluric Souding inverting and earth's surface magnetic signature, with reference to high-precision
The value exception that magnetic survey curve occurs is spent, delineation is conducive into the structural altered zone C of ore deposit.
Physical detecting measurement result shows that local area develops a large amount of nearly north-south structures bands, such as j bands, k bands, m bands, n bands, office
Visible its in portion intersects compound.Special j bands, k bands the north and southern areas, deep extension are larger, and universal vertical depth is reachable
1000m, the formation to U metallogeny is highly beneficial.Local area also develops a large amount of nearly north-south buried structure bands, and can to deep extension
Up to 1000m or so, the compound position of particularly different rift structures is the favourable space of U metallogeny, and most important is that p bands and q bands are deep
Portion contact site.
Therefore, it is the Tectonic extension for being conducive into ore deposit with deep contact site to choose j bands, k bands, m bands, n bands and p bands and q
Band C.
Step (5), it is determined that it is preferred that into ore deposit target area.
The construction for being conducive into ore deposit that the structural altered zone A for being conducive into ore deposit that step (2) is obtained, step (3) are obtained
The structural altered zone C for being conducive into ore deposit that alteration zone B and step (4) are obtained is marked on large scale remote sensing structure explanation figure,
Collectively constitute and preferably lie concealed ore-forming structure band into ore deposit target area, i.e. granite type U-ore.
Then a bands, b bands, c bands, d bands, e bands, f bands, g bands, h bands, i bands, j bands, k bands, m bands, n bands and p bands and q bands deep connect
The structural belts such as contact portion position have collectively constituted the required granite type U-ore obtained of the invention and have lain concealed ore-forming structure band.
Claims (4)
1. a kind of granite type U-ore lies concealed ore-forming structure band recognition methods, it is characterised in that：It comprises the following steps：Step
(1) large scale remote sensing structure explanation figure, is made；Step (2), chooses on large scale remote sensing structure explanation figure and is conducive into
The structural altered zone A of ore deposit；Step (3), extracts the structural altered zone B that chemical probing information obtains being conducive into ore deposit；Step (4),
Extracts physical detection information obtains being conducive into the structural altered zone C of ore deposit；Step (5), it is determined that it is preferred that into ore deposit target area；
Described step (1) sets up rift structure remote Sensing Interpretation mark including (1.1) on remote sensing image；(1.2) structure will be broken
Make remote Sensing Interpretation mark to mark on remote sensing image, obtain large scale Remote Sensing Structural Interpretation figure；Described rift structure remote sensing
Interpretation mark includes：Negative land form, linear pattern cheuch, linear tonal anomaly band, the linear negative ground being discontinuously distributed of the linear alignment
Shape；
Being conducive into the structural altered zone A of ore deposit in described step (2) includes：1. multigroup rift structure intersection part on region,
And ore-forming structure band is based on a property turned round, connected region ore-controlling structure；2. magmatic activity of many phases time development position, including late period
Intermediate-basic dike, granitello development location；3. hydrothermal alteration development location, including the explanation of ore deposit early stage muscovitization, alkali, thin,tough silk
The type alteration of cloud face and metallogenic period silication, hematization, pyritization, atropurpureus fluorite line style alteration development location；4. not
The metallogenetic structure surface development position of same type, different lithology contact site, structural altered zone intersect compound position.
2. a kind of granite type U-ore according to claim 1 lies concealed ore-forming structure band recognition methods, it is characterised in that：Institute
The step of stating (3) includes (3.1) and chemical probing work is disposed on the large scale remote sensing structure explanation figure that step (1) is obtained
Area, including：1. area is larger, the preferable uranium component of continuity, soil thermoluminescence exceptions area；2. fit and the progressively uranium of concentration point
Measure spatial abnormal feature area and the abnormal concentration center of stronger uranium component；3. U, Mo, Be component combination are abnormal with deep component in fault structure zone
Correspondence recombination region；(3.2) U components isogram, Be components isogram, the Mo components of chemical probing workspace are drawn respectively
Isogram, soil thermoluminescence isogram, the construction for being chosen for being conducive into ore deposit by the abnormal area in the drawing of gained lose
Variable speed B.
3. a kind of granite type U-ore according to claim 2 lies concealed ore-forming structure band recognition methods, it is characterised in that：Institute
The step of stating (4) includes (4.1) and physical detecting work is disposed on the large scale remote sensing structure explanation figure that step (1) is obtained
Area, including：There are a large amount of mineralization anomaly points, but known structural altered zone is less, and extend spread region in confused situation to deep；
(4.2) Audio Magnetotelluric Souding data and ground high-precision magnetic survey data are gathered on physical detecting workspace；According to audio
Underground medium resistivity distribution characteristics and earth's surface magnetic signature after telluric electromagnetic sounding inverting, combined high precision magnetic survey curve occur
Value it is abnormal, delineation is conducive into the structural altered zone C of ore deposit.
4. a kind of granite type U-ore according to claim 3 lies concealed ore-forming structure band recognition methods, it is characterised in that：Institute
The step of stating (5), which includes the structural altered zone A for being conducive into ore deposit that obtains step (2), step (3) is obtained is conducive into ore deposit
Structural altered zone B and the obtained structural altered zone C for being conducive into ore deposit of step (4) respectively in large scale remote sensing structure explanation
Marked on figure, collectively constitute and preferably lie concealed ore-forming structure band into ore deposit target area, i.e. granite type U-ore.
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