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In-situ U-Pb isotope age optimization method for pitchblende micro-region

A pitchblende and isotope technology, applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of U-Pb isotope age gaps are often large and difficult to judge.

Active Publication Date: 2019-06-18
BEIJING RES INST OF URANIUM GEOLOGY
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Problems solved by technology

The existing application of this method shows that the obtained U-Pb isotopic ages of multiple different points are often different, and it is difficult to judge which ages can reflect the true metallogenic age.

Method used

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  • In-situ U-Pb isotope age optimization method for pitchblende micro-region
  • In-situ U-Pb isotope age optimization method for pitchblende micro-region
  • In-situ U-Pb isotope age optimization method for pitchblende micro-region

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Embodiment Construction

[0024] A method for in-situ U-Pb isotope age optimization of pitchblende micro-regions provided by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0025] Taking the Zhangjia uranium deposit as an example, as figure 1 As shown, a kind of pitchblende micro-area in-situ U-Pb isotope age optimization method provided by the present invention comprises the following steps:

[0026] Step 1: Data Wrangling

[0027] The data given by LA-ICP-MS in situ analysis in the laboratory were sorted out so that the U-Pb isotope age of each point corresponds to the rare earth element data of the corresponding point one by one, and the table shown in Table 1 was obtained, which is convenient Comparative analysis.

[0028] Table 1 data collation style (only part of the data is listed)

[0029]

[0030] Step 2: Data calculation

[0031] Standardize the rare earth elements, that is, divide the corresponding ...

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Abstract

The invention belongs to the technical field of isotope metallogenic age analysis, and particularly relates to an in-situ U-Pb isotope age optimization method for a pitchblende micro-region. The method comprises the following steps: 1, data sorting is carried out; 2, LREE / HREEN is calculated; 3, an age-(LREE / HREE) N ratio graph is drawn; 4, a rare earth distribution pattern graph is drawn; and 5,data optimization and weighted average processing are carried out to obtain uranium mineralization age. According to the method disclosed by the invention, the effectiveness of the U-Pb isotope age ofpitchblende can be accurately obtained.

Description

technical field [0001] The invention belongs to the technical field of isotope metallogenic age analysis, and in particular relates to an in-situ U-Pb isotope age optimization method for pitchblende micro-zones. Background technique [0002] Ore-forming age is one of the important contents in the study of ore deposits, and it is one of the important parameters for in-depth study of the geodynamic environment of ore-forming, the genesis of ore deposits, and the degree of preservation after ore-forming. For hydrothermal uranium deposits, pitchblende single minerals have been used for a long time to perform solution dilution method, and the corresponding U and Pb isotopic compositions are obtained by thermal ionization mass spectrometry, and then their apparent ages are calculated. By processing the U and Pb isotope composition data of multiple pitchblende single mineral samples with relevant isochrones and coincidence lines, the isochron age and the age of the intersection poi...

Claims

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Application Information

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IPC IPC(8): G01N27/62
Inventor 郭春影白芸
Owner BEIJING RES INST OF URANIUM GEOLOGY
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