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Device and method for in situ micro-area isotope dating

An isotopic and in-situ technology, applied in the fields of geosciences and petroleum geology, can solve problems such as cumbersome operation steps, long experiment cycle, and potential safety hazards, and achieve the effects of reducing the experimental process, simplifying operations, and ensuring safety

Active Publication Date: 2021-10-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The present invention provides an in-situ micro-area isotope dating device and method with different acquisition parameters, especially suitable for (U-Th) / He dating, which is used to solve the problems of cumbersome operation steps, many processes, and experimental cycles in the prior art. length and technical problems with potential safety hazards in the experiment

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  • Device and method for in situ micro-area isotope dating

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with accompanying drawing.

[0040] Such as figure 1 As shown, the present invention provides an in-situ micro-area isotope dating device with different acquisition parameters, which includes a sample container 1 and a laser 2, the open end of the sample container 1 is provided with a transparent cover 11, and the laser 2 is movably arranged on the cover 11 above.

[0041] Further, the laser 2 is a 193nm excimer laser. Therefore, the requirements for samples are greatly reduced, that is, there is no need to manually select, measure, and load samples (such as apatite, zircon particles), and a single mineral can be treated with micro-zone cold exfoliation to release the helium-4 element ( 4 He), and there is no thermal effect, so that the error of the experiment is small.

[0042] Further, the laser 2 includes a camera for observing the position of the sample and a controller for the laser 2 to reach ...

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Abstract

The invention relates to an in-situ micro-area isotope dating device and method, which relates to the technical field of geology and petroleum geological research, and is used to solve the problems in the prior art of cumbersome operation steps, many processes, long experiment period and potential safety hazards in the experiment technical problem, the in-situ micro-area isotope dating device provided by the present invention includes a sample container and a laser, and the laser above the sample container can perform micro-area cold ablation of a single mineral in the sample container to release helium-4 element ( 4 He), and there is no thermal effect, so the experimental error is reduced and the accuracy of the experiment is improved; at the same time, by adjusting the laser spot and frequency and other parameters, the apatite and zircon samples can be ablated twice to excite the uranium element ( U) and thorium element (Th), since the step of acid chemical digestion in the traditional method is canceled, it not only reduces and simplifies the operation of the experiment, but also ensures the safety of the experiment.

Description

technical field [0001] The invention relates to the technical field of geoscience and petroleum geological research, in particular to an in-situ micro-area isotope dating device and method. Background technique [0002] The radioisotope dating method, especially the (U-Th) / He dating technology is a new technology for low-temperature thermochronology research that has developed rapidly in recent years. etc. have been widely used, especially in the structural uplift and denudation time and denudation thickness restoration in sedimentary basins, the dynamic evolution of thermal history, the era of oil generation after the formation of structures, the trap formation time caused by structural uplift and the constraints of accumulation age, etc. In the research, it has broad application prospects. The (U-Th) / He analysis method commonly used at home and abroad is mainly divided into four steps: (1) Select apatite and zircon mineral particles with well-developed crystal form, no cr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/626
CPCG01N27/62
Inventor 王杰王萍陶成腾格尔刘文汇马亮帮
Owner CHINA PETROLEUM & CHEM CORP
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