CN107966431A - A kind of sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate - Google Patents
A kind of sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate Download PDFInfo
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Abstract
The invention belongs to Prospecting Sandstone-type Uranium Deposits technical method in basin and Predication of Prospective Areas field, specifically discloses a kind of sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate, this method comprises the following steps：1. determine destination layer；2. system acquisition sample；3. sample treatment；4. the measure of sample initial uranuim content；5. the measure of sample activity uranium content；6. calculate the mobile uranium leaching rate in sample；7. draw a circle to approve favorable area for uranium ore-formation.The method of the present invention makes up the basin erosion single uranium source body of source region in the defects of sandstone-type uranium mineralization with respect Favorable Areas delineation, being capable of effective evaluation destination layer minerogenic potentiality, target prospecting area is reduced, improves Prospecting Sandstone-type Uranium Deposits efficiency, and then enriches and improves Prospecting Sandstone-type Uranium Deposits technical method in basin.
Description
Technical field
The invention belongs to Prospecting Sandstone-type Uranium Deposits technical field in basin, and in particular to a kind of based on mobile uranium leaching rate
Sandstone-type uranium deposit Favorable Areas technique for delineating.
Background technology
Mobile uranium refers to the uranium that can be migrated out in rock by fluid-activated, be also known as " leaching uranium ", " dynamic uranium ",
" Leaching Uranium " etc..The leaching rate of mobile uranium in the body of uranium source, the always activity function in uranium exploration as uranium
Parameter and the important indicator for evaluating a certain basin section minerogenic potentiality.
The metallogenic material (mobile uranium) of sandstone-type uranium mineralization with respect mainly has two big sources, i.e. basin erosion source region uranium-rich massif in basin
With the uranium source of Ore bearing stratum itself.Traditional view thinks that the uranium-rich massif of basin erosion source region is the main of sandstone-type uranium mineralization with respect in basin
Uranium source body, but have ignored the active uranium content of Ore bearing stratum in itself.Mineral exploration in recent years the result shows that, the Yi Li in China
Basin, the Junggar Basin and Ordos Basin, the active uranium content of Ore bearing stratum itself, can be with tegillums compared with other deposition floor heights
Between oxidation water leaching take out of, formed efficient uranium source body and primary uranium enrichment, played in the forming process of sandstone-type uranium mineralization with respect to pass
Important effect, directly influences the development scale and distribution of sandstone type uranium mineralization.But Ore bearing stratum mobile uranium in basin
The measuring condition and method of leaching rate go back disunity at present.Therefore, the present invention provides a kind of based on Ore bearing stratum activity in basin
Uranium extraction rate into ore deposit Favorable Areas technique for delineating, it is abundant and improve Prospecting Sandstone-type Uranium Deposits technical method in basin.
The content of the invention
It is an object of the invention to make up lacking during the basin erosion single uranium source body of source region is drawn a circle to approve in sandstone-type uranium mineralization with respect Favorable Areas
Fall into, there is provided it is a kind of based in basin Ore bearing stratum mobile uranium leaching rate into ore deposit Favorable Areas technique for delineating, improve target prediction
Efficiency and accuracy.
The technical solution adopted in the present invention is：
A kind of sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate, including following following steps：
(1) destination layer is determined
(2) system acquisition sample
(3) sample treatment
With distilled water by sample clean it is clean after, sample is divided into two parts, is crushed to 80 mesh and 200 mesh respectively.
(4) measure of sample initial uranuim content
Using rock microelement analyzer (ICP-MS), the uranium content in 200 mesh samples is tested, is considered as the original uranium of sample
Content.
(5) measure of sample activity uranium content
According to NORTHWEST CHINA portion Formation of Sandstone-type Uranium Deposits groundwater chemical environment, first by NaHCO3It is configured to distilled water
The weak alkaline aqueous solution of pH=8, the leachate as sample.Then by the sample of 80 mesh and leachate with solid-to-liquid ratio 1:10 is mixed
Close, soak 35 days at ambient temperature, and leachate is respectively taken respectively at the 7th day, 14 days, 21 days, 28 days and 35 days, it is micro- in liquid
The uranium content in leachate is tested on secondary element analyzer (ICP-AES), surveys the active uranium content that uranium content is sample.
(6) the mobile uranium leaching rate in sample is calculated
The mobile uranium leaching rate computational methods of sample are V=U '/U × 100%.Wherein V is sample activity Uranium extraction rate, U '
For active uranium content in leachate, U is sample initial uranuim content.
(7) favorable area for uranium ore-formation is drawn a circle to approve
By the mobile uranium leaching rate data of all samples, destination layer mobile uranium leaching rate isogram is drawn out, is lived in figure
Property Uranium extraction rate Spring layer is favorable area for uranium ore-formation.
Destination layer mainly chooses the grey smalt for being conducive to U metallogeny rich in breeze and pyrite etc. in the step (1)
Rock, the sandstone in being mainly Jurassic system and Cretaceous System in NORTHWEST CHINA area.
Sample collection moves towards uniformly to gather the original of non-alteration according to destination layer occurrence along destination layer in the step (2)
Raw sample of sandstone, and record the latitude and longitude coordinates of sampling position.
The example weight that 80 mesh are crushed in the step (3) is 200g, and the example weight for being crushed to 200 mesh is 50g.
Described step (5) sample is in immersion process, and stirring is once, each to stir 10 minutes when 24 is small；
The step (5) is if sample is surveyed for 14 days for 21 days in immersion with 21 days or immersion with the active uranium content after 28 days
Examination value is identical, shows that mobile uranium leaches completely in sample, terminates immersion.
The longitude and latitude that records is sat when the drafting of mobile uranium leaching rate isogram is according to sample collection in the step (7)
Mark and mobile uranium leach rate score, and destination layer mobile uranium leaching rate isogram is drawn using Mapgis mapping softwares.
The beneficial effects of the invention are as follows：The present invention is according to typical sandrock-type uranium deposit earth's surface aquation in NORTHWEST CHINA portion basin
Study point, there is provided a kind of experimental method for measuring the activity itself uranium content of destination layer containing ore deposit, the activity calculated based on this method
Uranium extraction rate score, can effective evaluation destination layer minerogenic potentiality, reduce target prospecting area, improve Prospecting Sandstone-type Uranium Deposits efficiency,
And then enrich and improve Prospecting Sandstone-type Uranium Deposits technical method in basin.In Yili Basin and the Junggar Basin look for ore deposit to put into practice,
Method using the present invention, according to basin periphery destination layer mobile uranium leaching rate data, it is indicated that in South Yili Basin and standard
Gaer Basin South Margin has good ore-prospecting future, is confirmed by exploration, and gratifying uranium ore money is obtained in above-mentioned two area
Source.
Brief description of the drawings
Fig. 1 is a kind of sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate provided by the present invention
Flow chart；
Fig. 2 In The Southern Part of Jungger Basin bottom of Cretaceous formation sandstone mobile uranium leaching rates and favorable area for uranium ore-formation delineation.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
A kind of as shown in Figure 1, sandstone-type uranium deposit Favorable Areas delineation side based on mobile uranium leaching rate provided by the invention
Method, comprises the following steps：
(1) destination layer is determined
Destination layer mainly chooses the gray post for being conducive to U metallogeny rich in plant breeze and pyrite etc., optimal ash
Color sandstone thickness is 10m-100m, the sandstone in being mainly Jurassic system and Cretaceous System in NORTHWEST CHINA area.
(2) system acquisition sample
Sample collection is according to destination layer occurrence, along the primary sandstone sample of the non-alteration of the equidistant uniformly collection of destination layer trend
Product, and the latitude and longitude coordinates of sampling position are recorded, draw mobile uranium leaching rate isogram easy to the later stage.
(3) sample treatment
With distilled water by sample clean it is clean after, sample is divided into two parts, is crushed to 80 mesh and 200 mesh respectively.Wherein, 80
The requirement of mesh example weight reaches 200g, and the requirement of 200 mesh example weights reaches 50g.
(4) measure of sample initial uranuim content
Using rock microelement analyzer (ICP-MS), the uranium content in 200 mesh samples is tested, is considered as the original uranium of sample
Content.
(5) measure of sample activity uranium content
According to NORTHWEST CHINA portion Formation of Sandstone-type Uranium Deposits groundwater chemical environment, first by NaHCO3It is configured to distilled water
The weak alkaline aqueous solution of pH=8, the leachate as sample.Then by the sample of 80 mesh and leachate with solid-to-liquid ratio 1:10 is mixed
Close, soak 35 days at ambient temperature, in immersion process, stirring is once, each to stir 10 minutes when 24 is small, and respectively
Leachate is respectively taken in the 7th day, 14 days, 21 days, 28 days and 35 days, leaching is tested on liquid trace element analyzer (ICP-AES)
Go out the uranium content in liquid, survey the active uranium content that uranium content is sample.If sample is soaking 14 days and 21 days or immersion
21 days identical with the mobile uranium content measuring value after 28 days, shows that the mobile uranium in sample is leached completely, terminates immersion.
(6) the mobile uranium leaching rate in sample is calculated
The mobile uranium leaching rate computational methods of sample are V=U '/U × 100%.Wherein V is sample activity Uranium extraction rate, U '
For active uranium content in leachate, U is sample initial uranuim content.
(7) favorable area for uranium ore-formation is drawn a circle to approve
By the mobile uranium leaching rate data of all samples, latitude and longitude coordinates that according to sample collection when records utilize
Destination layer mobile uranium leaching rate isogram is drawn by Mapgis mapping softwares, there is mobile uranium leaching rate Spring layer in figure for U metallogeny
Li Qu.
1 South Border of Junggar Basin, Xinjiang, china example of embodiment
In The Southern Part of Jungger Basin bottom of Cretaceous formation sandstone occurrence and thickness are stablized relatively, and are rich in breeze and organic matter,
Be this area it is traditional look for ore deposit destination layer.Moved towards along Cretaceous System, East and West direction uniformly gathers sample, tests initial uranuim content therein
With active uranium content, mobile uranium leaching rate is calculated, irises out mobile uranium leaching rate Spring layer as favorable area for uranium ore-formation.Utilize this hair
Bright method carries out sandstone-type uranium deposit Favorable Areas delineation to South Border of Junggar Basin, Xinjiang, china and comprises the following steps that：
(1) bottom of Cretaceous formation gray post is selected as destination layer.This layer of steady mode of occurrence, thickness 20m-30m, rich in having
Machine matter and breeze, are the sheaf of ideal positions of U metallogeny.
(2) bottom of Cretaceous formation gray post moves towards approximately EW, according to about 10km equidistantly uniformly gathers sample from east to west
Product, every example weight reach about 1kg or so, and record the latitude and longitude coordinates of sampled point.
(3) with distilled water by the sample clean collected it is clean after, sample is divided into two parts, be crushed to respectively 80 mesh and
200 mesh.Wherein, the requirement of 80 mesh example weights reaches 200g, and the requirement of 200 mesh example weights reaches 50g.
(4) rock microelement analyzer (ICP-MS) is utilized, tests the uranium content in 200 mesh samples, is considered as sample original
Beginning uranium content.
(5) by NaHCO3The weak alkaline aqueous solution of pH=8 is configured to distilled water, the leachate as sample.Then will
The sample of 80 mesh is with leachate with solid-to-liquid ratio 1:10 mixing, soak, in immersion process, are stirred when 24 is small at ambient temperature
Mix once, every time stirring 10 minutes.After immersion 21 days, leachate is tested on liquid trace element analyzer (ICP-AES)
Uranium content numerical value and soak 14 days value it is same or like, show that the mobile uranium in sample is leached completely, terminate immersion.
(6) the active uranium content of sample accounts for mobile uranium leaching rate of the percentage as sample of initial uranuim content, specific to survey
Examination and result of calculation are as shown in table 1.
1 In The Southern Part of Jungger Basin Cretaceous System lower sandstone mobile uranium leaching rate result of calculation of table
(7) by the mobile uranium leaching rate data of all samples, latitude and longitude coordinates that according to sample collection when records utilize
Destination layer mobile uranium leaching rate isogram is drawn by Mapgis mapping softwares, as shown in Figure 2.
From upper table 1 and Fig. 2：Nearby mobile uranium leaching rate is higher in In The Southern Part of Jungger Basin sulphur ditch town, is to form sand
The favourable section of lithotype uranium ore, investigates through surface geology and finds that nearby there is uranium mineralization point at 3 in sulphur ditch town.
The present invention is explained in detail above in conjunction with drawings and examples, but the present invention is not limited to above-mentioned implementation
Example, within the knowledge of a person skilled in the art, can also make on the premise of present inventive concept is not departed from
Go out various change.The content not being described in detail in the present invention can use the prior art.
Claims (5)
- A kind of 1. sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate, it is characterised in that：This method includes Following steps：(1) destination layer is determined；(2) system acquisition sample；(3) sample treatment；With distilled water by sample clean it is clean after, sample is divided into two parts, is crushed to 80 mesh and 200 mesh respectively.(4) measure of sample initial uranuim contentUsing rock microelement analyzer (ICP-MS), the uranium content in 200 mesh samples is tested, is considered as the original uranium of sample and contains Amount；(5) measure of sample activity uranium contentFirst by NaHCO3The weak alkaline aqueous solution of pH=8 is configured to distilled water, the leachate as sample；Then by 80 mesh Sample and leachate with solid-to-liquid ratio 1:10 mixing, at ambient temperature soak 35 days, and respectively at the 7th day, 14 days, 21 days, Respectively take leachate within 28 days and 35 days, the uranium content in leachate is tested on liquid trace element analyzer (ICP-AES), is surveyed Uranium content is the active uranium content of sample；(6) the mobile uranium leaching rate in sample is calculatedThe mobile uranium leaching rate computational methods of sample are V=U '/U × 100%；Wherein V is sample activity Uranium extraction rate, and U ' is active uranium content in leachate, and U is sample initial uranuim content；(7) favorable area for uranium ore-formation is drawn a circle to approveBy the mobile uranium leaching rate data of all samples, destination layer mobile uranium leaching rate isogram is drawn out, mobile uranium in figure Leaching rate Spring layer is favorable area for uranium ore-formation.
- 2. a kind of sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate according to claim 1, its It is characterized in that：Gray posts of the selection thickness 20m-100m rich in plant breeze and pyrite is as mesh in the step (1) Mark layer.
- 3. a kind of sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate according to claim 1, its It is characterized in that：Sample is by equidistantly uniformly collection in the step (2).
- 4. a kind of sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate according to claim 1 or 3, It is characterized in that：The example weight requirement that 80 mesh are crushed in the step (3) reaches 200g, is crushed to the sample of 200 mesh Weight demands reach 50g.
- 5. a kind of sandstone-type uranium deposit Favorable Areas technique for delineating based on mobile uranium leaching rate according to claim 1, its It is characterized in that：Described step (5) sample is in immersion process, and once, stirring 10 minutes, work as sample every time for stirring when 24 is small Product are soaking 14 days and 21 days or immersion, then termination immersion identical with the mobile uranium content measuring value after 28 days in 21 days.
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Cited By (2)
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| CN112816276A (en) * | 2020-11-27 | 2021-05-18 | 核工业北京化工冶金研究院 | Method for monitoring leaching state of in-situ leaching uranium mining |
| CN114384604A (en) * | 2021-12-31 | 2022-04-22 | 核工业北京地质研究院 | Method for optimizing sandstone-type uranium ore favorable uranium-bearing area based on uranium ore forming elements |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112816276A (en) * | 2020-11-27 | 2021-05-18 | 核工业北京化工冶金研究院 | Method for monitoring leaching state of in-situ leaching uranium mining |
| CN112816276B (en) * | 2020-11-27 | 2023-04-14 | 核工业北京化工冶金研究院 | Method for monitoring leaching state of in-situ leaching uranium mining |
| CN114384604A (en) * | 2021-12-31 | 2022-04-22 | 核工业北京地质研究院 | Method for optimizing sandstone-type uranium ore favorable uranium-bearing area based on uranium ore forming elements |
| CN114384604B (en) * | 2021-12-31 | 2024-08-09 | 核工业北京地质研究院 | Method for optimizing favorable uranium-bearing zone of sandstone-type uranium deposit based on uranium-bearing elements |
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Application publication date: 20180427 |