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A method for judging whether u-pb isochron age of uranium deposit has geological significance

A technology of isochrone and uranium deposits, which is applied in the field of judging whether the timeline age has geological significance, can solve the problem that the age does not have geological significance, and achieve the effect of reliable data, high matching degree, and accurate metallogenic age

Active Publication Date: 2022-04-19
BEIJING RES INST OF URANIUM GEOLOGY
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Problems solved by technology

However, some problems have been encountered in the process of practical application of this method. For example, the model assumes that the initial lead is homogeneous during mineralization, but samples with different initial lead concentrations may also form a better consistent line, resulting in the fitted age does not have any geological significance

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  • A method for judging whether u-pb isochron age of uranium deposit has geological significance
  • A method for judging whether u-pb isochron age of uranium deposit has geological significance
  • A method for judging whether u-pb isochron age of uranium deposit has geological significance

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with accompanying drawings and examples.

[0034] Calculation example of the age of uranium mineralization in the Hadatu sandstone type in the Erlian Basin

[0035] Such as figure 1 Shown, a kind of uranium deposit U-Pb isochron age provided by the present invention has the judgment method of geological significance, comprises the following steps:

[0036] Step S1

[0037] Using the lead isotopic composition, U content, and Pb content obtained from the analysis and testing of 19 whole-rock samples from the Hadatu uranium deposit, the 206 Pb / 204 Pb, 207 Pb / 204 Pb, 238 U / 204 Pb, 235 U / 204 Ratio of Pb.

[0038] Step S2

[0039] Each sample is 238 U / 204 Pb, 206 Pb / 204 The Pb value is used as the X and Y values ​​of the plane Cartesian coordinate system, and a slope value is calculated for every two samples, and all samples with the same slope value are divided into one catego...

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Abstract

The invention belongs to the research fields of uranium ore-forming chronology and uranium ore-forming mechanism, and specifically relates to a method for judging whether the U-Pb isochron age of a uranium deposit has geological significance. The method of the present invention comprises the following steps: step 1 processes the original data; step 2 groups the data; step 3 fits and calculates respectively 238 U‑ 206 Pb isochron age, 235 U‑ 207 Pb isochrone age and calculation 206 Pb 1 / 204 Pb and 207 Pb 1 / 204 Pb value; made in step 4 206 Pb / 204 Pb— 207 Pb / 204 Pb scatter diagram; step 5 judges the metallogenic age according to the results obtained in steps 3 and 4. The method of the present invention can judge the age of the fitted uranium-lead isochrone, avoid wrong ore-forming ages due to data statistics errors, provide chronological basis for the study of the metallogenic mechanism of uranium deposits, and is applicable to all areas of my country. Metallogenic Chronology of Type Uranium Deposits.

Description

technical field [0001] The invention belongs to the research fields of uranium ore-forming chronology and uranium-forming mechanism, and specifically relates to a method for judging whether the U-Pb isochron age of a uranium ore deposit has geological significance. Background technique [0002] The study of metallogenic chronology of ore deposits has very important theoretical and practical significance. It is a key element in the study of ore deposit genetic mechanism, ore-forming background, ore-forming process, etc. The key is also one of the most cutting-edge research fields (Pei Rongfu et al., 1993, 1995; Hu Ruizhong et al., 2014; Cun Xiaoni, 2016; Luo Jincheng et al., 2019; Xia Yuliang, 2019). [0003] The change of lead isotopic ratio is a powerful tool to solve the problems of rock origin and mineralization ( et al., 1979), U-Pb isotope is the most widely used method in the dating of uranium deposits. Isochron ages obtained from whole-rock samples or uranium mine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01V9/00
CPCG01N33/24G01V9/00
Inventor 林效宾李西得刘红旭刘武生
Owner BEIJING RES INST OF URANIUM GEOLOGY
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