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Double dating method for single-particle monazite

A monazite and single particle technology, applied in the field of dating, can solve the problems of double dating method that no one studies

Inactive Publication Date: 2016-05-11
HEBEI UNIV OF ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, no one in China has studied the dating method of monazite. At present, there are very few scholars abroad who conduct U-Pb dating or (U-Th) / He dating alone for monazite, but the two methods The combined double dating method has not been studied so far

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  • Double dating method for single-particle monazite
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  • Double dating method for single-particle monazite

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Embodiment Construction

[0020] Below in conjunction with embodiment the present invention is further described in detail.

[0021] The double dating method of a kind of single particle monazite of the present invention comprises the following steps:

[0022] (1) Select single-particle monazite with complete crystal form and no inclusions, and take pictures with a digital camera to obtain the precise shape and size of monazite particles, which are used to calculate the α-particle injection correction parameter F T , the calculation formula is:

[0023] F T = 1 - 3 S 4 R + S 3 16 R 3

[0024] where F T : α particle emission correction parameter; S: the stopping distance of α particle when U and Th deca...

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Abstract

The invention discloses a double dating method for single-particle monazite. The method includes the steps that the crystallization age, namely the occurrence time of a magmatic intrusion incident , of a granite geologic body where the monazite is located can be obtained; (U-Th) / He age of the monazite can be obtained and represents the uplift-related cooling age, namely the time of fast tectonic uplift of the geologic body. The intrusion history and the tectonic uplift history of the geologic body where the monazite is located can be obtained through U-Pb and (U-Th) / He double dating of the single monazite at the same time, and the double dating method is of important geological significance.

Description

technical field [0001] The invention relates to a dating method, in particular to a double-dating method for single-grain monazite. Background technique [0002] Radioisotope dating is a rapidly developing dating technology in recent years, and its maturity has greatly promoted the development of geochronology. At present, U-Pb dating or (U-Th) / He dating is more widely used on zircon and apatite to study their crystallization age or cooling age, and the technology is relatively mature. However, at present, no one in China has studied the dating method of monazite. At present, there are very few scholars abroad who conduct U-Pb dating or (U-Th) / He dating alone for monazite, but the two methods The combined double-dating method has not been studied so far. The innovation of the present invention is to realize the application of U-Pb and (U-Th) / He dual dating methods on the same monazite particle. Contents of the invention [0003] The present invention aims to solve the a...

Claims

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Application Information

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IPC IPC(8): G01N27/64
CPCG01N27/64
Inventor 金超刘浪涛白峰青张贝贝王冬利魏利娜
Owner HEBEI UNIV OF ENG
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