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Method for determining lithium isotopes in fluid inclusion water in quartz veins of porphyry ore deposits

A technology of fluid inclusions and lithium isotopes, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of low lithium content, less use, and difficulty in dissolving quartz

Active Publication Date: 2015-05-27
INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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Problems solved by technology

However, most of the quartz veins related to mineralization in hydrothermal deposits are small, and the fluid inclusions contained in the quartz veins are small in number and small in size, so the extracted fluid inclusion water is difficult to meet the test requirements
The currently commonly used minerals for lithium isotope determination are mica minerals, spodumene, hornblende and other minerals with high lithium content. Quartz is less used because of its low lithium content and insoluble

Method used

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  • Method for determining lithium isotopes in fluid inclusion water in quartz veins of porphyry ore deposits

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Embodiment 1～6

[0074] The test was carried out according to the above steps, and the results are shown in Table 1.

[0075] Table 1

[0076]

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Abstract

The invention discloses a method for determining lithium isotopes in fluid inclusion water. The method comprises the following steps: 1) determining lithium isotopes in quartz: performing surface purification, extraction of a fluid inclusion and ultrasonic extraction on a quartz sample, then dissolving, and performing chemical purification to perform the determination of the lithium isotopes; and 2) figuring out the lithium isotopes in the fluid inclusion water according to empirical formulas: a linear equation of delta 7LiQuartz-fluid=-23.197*(1000 / T)+38.057 and a linear correlation coefficient R2=0.9583. By adopting the method disclosed by the invention, the lithium isotopes in the fluid inclusion can be conveniently and quickly determined, thereby having important significance for researching a mineral deposit.

Description

technical field [0001] The invention relates to the field of isotope testing, in particular to a method for measuring lithium isotopes in fluid inclusion water in quartz veins of porphyry deposits. Background technique [0002] Porphyry copper deposits have become the most important type of copper deposits in the world due to their large scale, uniform mineralization of the whole rock, shallow burial, suitable for mining, and high recovery rate of ore dressing. In recent years, due to the discovery of porphyry deposits that are exposed on the surface and are easy to identify, more exploration needs to be turned to the search for hidden deposits. Forced people not only to be satisfied with the descriptive metallogenic-prospecting model, but to pay more attention to the tectonic magmatic process of porphyry deposit formation on the regional scale (Richards et al., 2001; Richards, 2003), and the deep formation of ore-bearing porphyry process and geodynamic background (Richards...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
Inventor 杨丹杨志明赵悦侯可军田世洪
Owner INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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