Method of testing uraninite formation age

A uranium ore and crystalline technology, applied in the field of uranium ore, can solve the problems of expensive SIMS/SHRIMP equipment and testing costs, and limited testing accuracy, and achieve the effects of strong applicability, good accuracy, and strong operability

Inactive Publication Date: 2017-07-07
BEIJING RES INST OF URANIUM GEOLOGY
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  • Abstract
  • Description
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Problems solved by technology

However, the spatial resolution of EMP is very high, but the test accuracy is limited, and the equipment and test cost of SIMS / SHRIMP are relatively expensive

Method used

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  • Method of testing uraninite formation age
  • Method of testing uraninite formation age
  • Method of testing uraninite formation age

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Embodiment

[0034] The present invention will be further described in detail below by taking the white granite-type uranium deposit in the Happy Valley area of ​​Namibia as an example.

[0035] Step 1: Carry out field investigation in the Happy Valley area of ​​Namibia, and collect uranium mineralized white granite samples purposefully. The samples are required to be fresh, generally 3×6×9cm.

[0036] Step 2: Rock ore identification and electronic probe analysis of the collected uranium-mineralized white granite. Firstly, light thin sections are made of the collected mineralized white granite with a thickness of about 0.3mm. The uranium mineral composition of the ore is observed on a microscope, and the uranium minerals with a particle size larger than 50μm are circled. Then, according to GB / T15074- 2008 "General Rules for Quantitative Analysis Methods of Electron Probe", JXA-8100 electronic probe analyzer is used to analyze the chemical composition of uranium minerals, so as to determine...

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Abstract

The invention belongs to the technical field of uranium ore, and specifically relates to a method for testing the formation age of crystalline uranium ore; The age of uranium deposits and the role of metallogenic evolution analysis, decomposing the key elements and main ore-controlling factors of each metallogenic period from complex geological phenomena, providing ideas for uranium deposit exploration, and guiding specific ore-prospecting work to test crystal quality The method for the formation age of uranium ore; including the following steps: Step 1, field investigation and collection of uranium ore samples; Step 2, rock ore identification and electronic probe analysis on the ore samples; Step 3, using LA-ICP-MS Micro-zone dating of crystalline uranium ore; step 4, data collation, parameter calculation and mapping, and finally the formation age of uranium ore is obtained.

Description

technical field [0001] The invention belongs to the technical field of uranium ore, in particular to a method for testing the formation age of crystalline uranium ore. Background technique [0002] At present, the research methods of the chronology of uranium deposits mainly include: (1) The isotope dilution TIMS method is used to measure uranium minerals such as crystalline uranium ore, and the ore-forming age is fitted by the U-Pb isochrone method. (2) Uranium ore is used instead of uranium minerals to determine the ore-forming age of the ore deposit, which greatly reduces the workload of sample preparation in the early stage. The theoretical basis is that the U and Pb isotopes in the uranium ore have reached uniformity since the evolution of uranium ore. However, the degree of isotope uniformity needs to be studied, and as a result, there are often large deviations in actual measurements. (3) Gangue minerals such as pyrite and galena, which coexist with uranium minerals,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 陈金勇范洪海顾大钊孟艳宁王生云
Owner BEIJING RES INST OF URANIUM GEOLOGY
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