CN109725004A - A kind of method of the existence form and content of determining uranium deposit Uranium in Rock - Google Patents
A kind of method of the existence form and content of determining uranium deposit Uranium in Rock Download PDFInfo
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- CN109725004A CN109725004A CN201811587584.1A CN201811587584A CN109725004A CN 109725004 A CN109725004 A CN 109725004A CN 201811587584 A CN201811587584 A CN 201811587584A CN 109725004 A CN109725004 A CN 109725004A
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Abstract
The invention belongs to uranium ore technical fields, specifically disclose a kind of existence form of determining uranium deposit Uranium in Rock and the method for content: acquisition uranium deposit rock；Rock sample is cut into light thin slice；White clouds master slice is attached on light thin slice；Standard uranium glass is cut out, muscovite is attached to uranium glass on piece；Correct light thin slice neutron exposure fluence inconsistency；Determine integrated neutron flux, exposure light thin slice；Light thin slice is cooling；It removes white clouds master slice and etches, reset on Yu Yuanguang thin slice；Statistical process light thin slice fission track density and form, determine Uranium occurrence in light thin slice；Fission track density caused by light thin slice Plays uranium glass unit uranium content is counted, and determines the content of uranium in Main Rock-forming Minerals；Determine the uranium content of total rock；Calculate the content of the uranium in uranium deposit rock in each mineral.This method solve integrated neutron flux intensity and irradiation time to be difficult to grasp, the statistics and analysis of mineral fission track very time-consuming the technical issues of being chosen as mine.
Description
Technical field
The invention belongs to uranium ore technical fields, and in particular to one kind determines uranium deposit Uranium in Rock based on induced-fission tracks
Existence form and content method.
Background technique
For looking for Uranium Deposit, needs the distribution to uranium, content, existence form to be studied in detail, find out uranium element
Existence form and partition in rock and altered rock is of crucial importance.Chemical analysis, neutron activation analysis, xrf analysis, light
Although the analysis test methods such as spectrum analysis can measure the uranium thorium content in sample, the space of uranium, thorium in the sample cannot be measured
Distribution and feature.
The contents and spatial distribution characteristic using uranium in alpha track method measurement rock or mineral most at present, but this method
There are its limitations: on the one hand the very low rock of uranium content or mineral not being available, uranium content 100,000/several to very much
It is several, alpha track is not observed on nuclear emulsion；On the other hand, strong alpha track decay also occurs for thorium, if it is not known that sample
Th/U ratio, can not just measure thorium, uranium content.And uranium source, migration, reallocation and the enrichment of fission-track method research uranium ore
Deng eliminating the mixed influence of mineral micro-inclusion.But there are integrated neutron flux intensity and irradiation time to be difficult to for this method
The defects of assurance, the statistics and analysis of mineral fission track is very time-consuming.
Summary of the invention
The purpose of the present invention is to provide a kind of existence forms that uranium deposit Uranium in Rock is determined based on induced-fission tracks
With the method for content, this method solve integrated neutron flux intensity and irradiation time to be difficult to grasp, the system of mineral fission track
Count and analyze very time-consuming the technical issues of being chosen as mine.
Realize the technical solution of the object of the invention: a kind of existence form of determining uranium deposit Uranium in Rock and the side of content
Method, this method specifically includes the following steps:
Step S1: acquisition uranium deposit rock；
StepS2: rock sample collected in above-mentioned steps S1 is cut into light thin slice and is polished；
Step S3: on the light thin slice after the fresh face paste of white clouds master slice is polished in above-mentioned steps S1；
Step S4: cutting out Standard uranium glass, and the another side fixation of white clouds master slice is attached to uranium glass on piece；
Step S5: the inconsistency of the neutron exposure fluence of correction rock light chip sample removes background track
It influences；
Step S6: determining integrated neutron flux, then by the rock light chip sample after correcting, removing in above-mentioned steps S5
It is irradiated；
Step S7: the rock light chip sample being irradiated in above-mentioned steps S6 is cooling；
Step S8: removing the white clouds master slice in above-mentioned steps S7 in rock light chip sample after cooling, and be etched,
It cleans, dry, and reset on Yu Yuanguang thin slice；
Step S9: the fission track density and form of statistics and observation rock light chip sample determine rock light sheet-like
The existence form of uranium in product；
Step S10: each Standard uranium glass unit in statistics above-mentioned steps S7 in rock light chip sample after cooling
Fission track density caused by uranium content, and determine the content of uranium in Main Rock-forming Minerals；
Step S11: according to the content of uranium in the Main Rock-forming Minerals in above-mentioned steps S7, the uranium content of total rock is determined；
Step S12: according to the content of the obtained uranium of above-mentioned steps S10 and step S11, each mine in uranium deposit rock is calculated
The content of uranium in object.
Light thin slice in the step S2 is polished to 0.03mm, selecting epoxy resin cooperation, diamines will as adhesive
Light thin slice, which is sticked to, to be carried on glass, is cut light thin slice and is carried glass, cleans sheet surface using cotton and acetone.
Pure white clouds master slice is selected in the step S3, and muscovite is cut into the ruler that glass is carried less than light thin slice
It is very little, it is rived along mica cleavage surface with knife, i.e., it is a piece of into two pieces, by the fresh face paste of white clouds master slice on light thin slice, by white clouds
Master slice is fixed on light thin slice with transparent adhesive tape.
In the step S4 by Standard uranium glass with transparent adhesive tape by the another of the white clouds master slice cut in above-mentioned steps S3
Face fixation is attached to uranium glass on piece.
Integrated neutron flux in the step S6 is 1017/cm2, and send rock light chip sample to heavy water test reactor
Inside irradiated.
Rock light chip sample is 20 days cooling in the step S7.
In the step S8 with 40% HF acid at room temperature dialogue mica sheet etch 35min.
Mineral existence form in the step S9 in rock light chip sample includes: isomorphism uranium, micro- or super
Micro- granular uranium mineral, adsorption uranium, the uranium in inclusion enclave and simple uranium oxide.
The content of uranium in Main Rock-forming Minerals is determined in the step S10 using the miniature cartography of fission track.
The uranium content of total rock is determined in the step S11 with chemical analysis.
The beneficial technical effect of the present invention lies in: (1) when of the invention method clear integrated neutron flux intensity and irradiation
Between, strong operability；(2) method of the invention determines containing for uranium in Main Rock-forming Minerals using the miniature cartography of fission track
Amount, improves the efficiency and accuracy of observation；(3) method of the invention directly observes uranium deposit rock using induced-fission tracks
The existence form of middle uranium.
Specific embodiment
Below with reference to embodiment, invention is further described in detail.
Using a kind of provided by this hair the existence form of uranium deposit Uranium in Rock is determined based on induced-fission tracks and contain
The method of amount, to Jiangxi Xiang Shan shoal uranium deposit rock carry out Uranium occurrence and and content determine specific step is as follows:
Step S1: acquisition uranium deposit rock
To phase mountain shoal uranium deposit carry out field on-the-spot investigation, system acquisition uranium deposit rock biotite monzonitic granite,
Sample requirement is fresh.
Step S2: rock sample collected in above-mentioned steps S1 is cut into light thin slice and is polished
Biotite monzonitic granite sample collected is cut into light thin slice, and is polished to 0.03mm.Select high temperature resistant, resistance to
Diamines (for the 7% of epoxy resin) is used as adhesive by light thin slice for epoxy resin (618 epoxy resin) cooperation of strong acid, highly basic
It is sticked to and carries on glass.Light thin slice carries glass and is cut into 2.2cm × 2.2cm size.Light sheet surface is gently cleaned with cotton and acetone,
Light chip sample surface cleaning is kept, to remove extra natural gum and other impurity.
Step S3: on the light thin slice after the fresh face paste of white clouds master slice is polished in above-mentioned steps S1, by white clouds master slice
Fresh face be fixed on light thin slice
Pure white clouds master slice is selected to do external detector.Muscovite is cut into and carries glass i.e. 2cm × 2cm less than light thin slice
The size of size is rived along mica cleavage surface with knife, i.e., a piece of into two pieces, by the fresh face paste of white clouds master slice in light thin slice
On, white clouds master slice is fixed on light thin slice with transparent adhesive tape, muscovite is numbered with number, and carry out telltale mark.
Step S4: cutting out Standard uranium glass, and the another side fixation of white clouds master slice is attached to uranium glass on piece
Standard uranium glass is cut into 2.2cm × 2.2cm size, with transparent adhesive tape by the 2cm cut in above-mentioned steps S3 ×
The another side fixation of the white clouds master slice of 2cm size is attached to uranium glass on piece, and white clouds master slice is numbered with number.
Step S5: the inconsistency of the neutron exposure fluence of correction rock light chip sample
In order to correct the inconsistency of rock light chip sample neutron exposure fluence, 10 rock light chip samples are
One group, at least to be put in each group of sample posted obtained in two Standard uranium glass pieces and above-mentioned steps S5 white clouds master slice and
Uranium glass method rock light chip sample is spaced.It is opposed with the Standard uranium glass piece that uranium content is 5 × 10-6 and 10 × 10-6
According to.For the influence for removing background track, white muscovite film explorer is also vented in every group.
Step S6: determining integrated neutron flux, then by the rock light chip sample after correcting, removing in above-mentioned steps S5
It send in heavy water test reactor and is irradiated.
According to the following table 1 and the uranium content of rock light chip sample, determines integrated neutron flux, then send in heavy water test reactor
It is irradiated.
The integrated neutron flux intensity and irradiation time of the different uranium contents of table 1
| The uranium content (10 of rock-6) | ≥10 | < 10 |
| Select neutron flux | 1017/cm2 | 1018/cm2 |
According to the uranium content of area's sample, using 1017/cm2Integrated neutron flux so send and carries out spoke in heavy water test reactor
According to.
Step S7: the rock light chip sample being irradiated in above-mentioned steps S6 is 20 days cooling, and reaching human body can connect
The dose of radiation of touching.
Step S8: removing the white clouds master slice in above-mentioned steps S7 in rock light chip sample after cooling, and with 40%
HF acid etches 35min at room temperature, is cleaned with clear water and dries white clouds master slice, and white clouds master slice is resetted on Yu Yuanguang thin slice.
Step S9: the fission track density and form of rock light chip sample are counted and observed with optical microscopy, is determined
The existence form of uranium in rock light chip sample
Mineral existence form in rock light chip sample includes 5 classes: (1) isomorphism uranium；(2) micro- or ultramicroscopic granules
Shape uranium mineral；(3) adsorption uranium；(4) uranium in inclusion enclave；(5) simple uranium oxide, i.e. ulrichile, containing thorouraninite etc..
Step S10: each Standard uranium glass unit in statistics above-mentioned steps S7 in rock light chip sample after cooling
Fission track density caused by uranium content, and determine therefrom that the content of uranium in Main Rock-forming Minerals.
Statistics show that fission track variable density caused by each Standard uranium glass unit uranium content is little, is calculated
Fission track density is average 120/0.lmm2About lppm uranium.It is miniature using fission track and according to fission track density
Cartography determines the content of uranium in Main Rock-forming Minerals.
Step S11: according to the content of uranium in the Main Rock-forming Minerals in above-mentioned steps S7, the uranium content of total rock is determined.
According to the content of uranium in the Main Rock-forming Minerals in above-mentioned steps S7, contained with the uranium that chemical analysis determines total rock
Amount；Uranium content small in size, in the higher accessory mineral of uranium content is determined in neutron activation analysis, is determined with electron probing analysis brilliant
The uranium content of matter uranium ore.
Step S12: according to the content of the obtained uranium of above-mentioned steps S10 and step S11, each mine in uranium deposit rock is calculated
The content of uranium in object.The content of uranium in each mineral of biotite monzonitic granite enters shown in the following table 2.
The content table of uranium in 2 biotite monzonitic granite of table in each mineral
The present invention is explained in detail above in conjunction with embodiment, but the present invention is not limited to above-described embodiments, at this
Field those of ordinary skill within the scope of knowledge, can also make various changes without departing from the purpose of the present invention
Change.The content being not described in detail in the present invention can use the prior art.
Claims (10)
1. a kind of method of the existence form and content of determining uranium deposit Uranium in Rock, which is characterized in that this method specifically includes
Following steps:
Step S1: acquisition uranium deposit rock；
Step S2: rock sample collected in above-mentioned steps S1 is cut into light thin slice and is polished；
Step S3: on the light thin slice after the fresh face paste of white clouds master slice is polished in above-mentioned steps S1；
Step S4: cutting out Standard uranium glass, and the another side fixation of white clouds master slice is attached to uranium glass on piece；
Step S5: the inconsistency of the neutron exposure fluence of correction rock light chip sample；
Step S6: determining integrated neutron flux, then carries out the rock light chip sample after correcting, removing in above-mentioned steps S5
Irradiation；
Step S7: the rock light chip sample being irradiated in above-mentioned steps S6 is cooling；
Step S8: the white clouds master slice in above-mentioned steps S7 in rock light chip sample after cooling is removed, and is etched, washes
Only, dry, and reset on Yu Yuanguang thin slice；
Step S9: the fission track density and form of statistics and observation rock light chip sample determine in rock light chip sample
The existence form of uranium；
Step S10: each Standard uranium glass unit uranium in statistics above-mentioned steps S7 in rock light chip sample after cooling contains
Fission track density caused by measuring, and determine the content of uranium in Main Rock-forming Minerals；
Step S11: according to the content of uranium in the Main Rock-forming Minerals in above-mentioned steps S7, the uranium content of total rock is determined；
Step S12: it according to the content of the obtained uranium of above-mentioned steps S10 and step S11, calculates in uranium deposit rock in each mineral
Uranium content.
2. the method for the existence form and content of a kind of determining uranium deposit Uranium in Rock according to claim 1, feature
Be: light thin slice in the step S2 be polished to 0.03mm, select epoxy resin cooperation diamines as adhesive by light
Thin slice, which is sticked to, to be carried on glass, is cut light thin slice and is carried glass, cleans sheet surface using cotton and acetone.
3. the method for the existence form and content of a kind of determining uranium deposit Uranium in Rock according to claim 2, feature
It is: selects pure white clouds master slice in the step S3, muscovite is cut into the size for carrying glass less than light thin slice, edge
Mica cleavage surface is rived with knife, i.e., a piece of into two pieces, and by the fresh face paste of white clouds master slice on light thin slice, white clouds master slice is used
Transparent adhesive tape is fixed on light thin slice.
4. the method for the existence form and content of a kind of determining uranium deposit Uranium in Rock according to claim 3, feature
It is: the another side of the white clouds master slice cut in above-mentioned steps S3 is consolidated to Standard uranium glass with transparent adhesive tape in the step S4
Surely it is attached to uranium glass on piece.
5. the method for the existence form and content of a kind of determining uranium deposit Uranium in Rock according to claim 4, feature
Be: the integrated neutron flux in the step S6 is 1017/cm2, and by rock light chip sample send in heavy water test reactor into
Row irradiation.
6. the method for the existence form and content of a kind of determining uranium deposit Uranium in Rock according to claim 5, feature
Be: rock light chip sample is 20 days cooling in the step S7.
7. the method for the existence form and content of a kind of determining uranium deposit Uranium in Rock according to claim 6, feature
Be: in the step S8 with 40% HF acid at room temperature dialogue mica sheet etch 35min.
8. the method for the existence form and content of a kind of determining uranium deposit Uranium in Rock according to claim 7, feature
Be: the mineral existence form in the step S9 in rock light chip sample includes: isomorphism uranium, micro- or submicroscopic
Granular uranium mineral, adsorption uranium, the uranium in inclusion enclave and simple uranium oxide.
9. the method for the existence form and content of a kind of determining uranium deposit Uranium in Rock according to claim 8, feature
It is: determines the content of uranium in Main Rock-forming Minerals in the step S10 using the miniature cartography of fission track.
10. the method for the existence form and content of a kind of determining uranium deposit Uranium in Rock according to claim 8, feature
It is: determines the uranium content of total rock in the step S11 with chemical analysis.
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| CN112763568A (en) * | 2020-12-30 | 2021-05-07 | 核工业北京地质研究院 | Method for rapidly estimating contribution rate of zircon and uranium in invaded rock type uranium deposit |
| CN113933313A (en) * | 2021-09-15 | 2022-01-14 | 核工业北京地质研究院 | Uranium element occurrence state identification method based on induced fission track |
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