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Method for judging whether uranium deposit U-Pb isochron age has geological significance or not

A technology for isochronous and uranium deposits, which is applied in the field of judging whether the age of the time line has geological significance, which can solve the problems of age without geological significance, and achieve the effects of reliable data, high coincidence, and accurate metallogenic age.

Active Publication Date: 2020-04-21
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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  • Method for judging whether uranium deposit U-Pb isochron age has geological significance or not
  • Method for judging whether uranium deposit U-Pb isochron age has geological significance or not
  • Method for judging whether uranium deposit U-Pb isochron age has geological significance or not

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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 field of uranium deposit mineralization chronology and uranium mineralization mechanism research, and particularly relates to a method for judging whether uranium depositU-Pb isochron age has geological significance or not. The method comprises the following steps of: step 1, processing original data; steps 2, grouping the data; steps 3, respectively fitting and calculating the <238>U-<206>Pb isochron age and the <235>U-<207>Pb isochron age, and calculating <206>Pb1 / <204>Pb and <207>Pb1 / <204>Pb values; steps 4, drawing a <206>Pb / <204>Pb-<207>Pb / <204>Pb scatter diagram; step 5, and judging the mineralization age according to the results obtained in the step 3 and the step 4. According to the method, the fitted uranium-lead isochron age can be judged, the situation that the wrong mineralization age is obtained due to data statistics errors is avoided, a chronological basis is provided for uranium deposit mineralization mechanism research, and the method is suitable for uranium deposit mineralization chronology research of various types of uranium deposits in China.

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 miner...

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Application Information

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Patent Type & Authority Applications(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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