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Method of analyzing fission track annealing degree of apatite by employing terahertz time-domain spectroscopy

A terahertz time domain and fission track technology, which is used in material analysis by optical means, material analysis, preparation of samples for testing, etc. Simple, few operation steps

Active Publication Date: 2017-06-13
CHINA UNIV OF PETROLEUM (BEIJING) +1
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Problems solved by technology

However, the above method is affected by its own resolution and applicability, and is more suitable for characterizing the annealing resistance of apatite through the analysis of the composition or physical properties of a single apatite, but not suitable for characterizing multiple apatite at the same time The overall degree of annealing of the internal fission track

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  • Method of analyzing fission track annealing degree of apatite by employing terahertz time-domain spectroscopy

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[0047] The present invention will be described in detail below in conjunction with accompanying drawings and embodiments, but those skilled in the art should know that the following embodiments are not the only limitation to the technical solution of the present invention, and any work done under the spirit of the technical solution of the present invention Equivalent transformation or modification shall be considered as belonging to the protection scope of the present invention.

[0048] The present invention provides a method for analyzing the annealing degree of apatite fission track by using terahertz time-domain spectral absorption coefficient. Taking the Durango apatite annealing experiment as an example, the method includes the following steps:

[0049] (1) Sample preparation stage:

[0050] Apatite samples were made first and all samples were etched. The samples include those that have not been annealed, those that have been fully annealed, and those that have been pa...

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Abstract

The invention relates to a method of analyzing the fission track annealing degree of apatite by employing terahertz time-domain spectroscopy. The method comprises the following steps of: performing heating and annealing experiments on various types of apatite samples, and putting the samples in a terahertz testing and analyzing device to be tested and analyzed to obtain an adsorption coefficient of the terahertz time-domain spectroscopy; representing the annealing degree subjected to the fission track of apatite in the samples by means of the adsorption index converted by the adsorption coefficient to establish a relationship plate between the adsorption index and the annealing temperature as well as the annealing time; and extrapolating experiment data to a geological history period according to the relationship plate, and analyzing the annealing degree of the to-be-tested sample and the annealing temperature and the annealing time subjected thereto. The method provided by the invention represents the fission track annealing degree of apatite for the first time by means of the absorption index of the terahertz spectroscopy, so that influence on the fission track research work caused by coarse grinding and improper polishing operations in a conventional method is avoided, and the requirement on the operating experience of an experimenter is reduced. The testing method is simple, the testing period is short, and the testing cost is low.

Description

technical field [0001] The invention relates to the research field of apatite fission track annealing in thermochronological methods, in particular to a method for rapidly measuring the annealing degree of apatite fission track by using terahertz time-domain spectroscopy. Background technique [0002] Thermochronology is a method of dating geological bodies by using the fission or decay products of radioactive elements in rock minerals to produce and accumulate in minerals, which can provide rich basin structure-sedimentary evolution and source rocks for oil and gas exploration Hot mature time information. Low-temperature thermochronology is a method of dating geological bodies by using the production and accumulation of fission or decay products of radioactive elements with low sealing temperature in rock minerals, mainly including fission tracks and (U-Th) / And two ways. Apatite fission track is one of the most widely used methods in low-temperature thermochronology. It ...

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Application Information

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IPC IPC(8): G01N21/3586G01N21/3563G01N1/28
CPCG01N1/286G01N21/3563G01N21/3586G01N2021/3572
Inventor 常健吴世祥吴航邱楠生刘帅肖瑶
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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