Advances in the Study on Mercury Isotope Geochemistry and Its Application in Mineral Deposits

XU Chun-xia; MENG Yu-miao; HUANG Cheng; TANG Chun; ZHENG Fang-wen

doi:10.15898/j.cnki.11-2131/td.202009210125

2021 Vol. 40, No. 2

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Article navigation > Rock and Mineral Analysis > 2021 > 40(2): 173-186

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XU Chun-xia, MENG Yu-miao, HUANG Cheng, TANG Chun, ZHENG Fang-wen. Advances in the Study on Mercury Isotope Geochemistry and Its Application in Mineral Deposits[J]. Rock and Mineral Analysis, 2021, 40(2): 173-186. doi: 10.15898/j.cnki.11-2131/td.202009210125

Citation:

XU Chun-xia, MENG Yu-miao, HUANG Cheng, TANG Chun, ZHENG Fang-wen. Advances in the Study on Mercury Isotope Geochemistry and Its Application in Mineral Deposits[J]. Rock and Mineral Analysis, 2021, 40(2): 173-186. doi: 10.15898/j.cnki.11-2131/td.202009210125

Advances in the Study on Mercury Isotope Geochemistry and Its Application in Mineral Deposits

1.
School of Hydraulic and Ecological Engineering, Nanchang Institute of Technology, Nanchang 330099, China
2.
State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China

More Information

Corresponding author: MENG Yu-miao, mengyumiao@vip.gyig.ac.cn

Received Date: 21 September 2020

Revised Date: 07 December 2020

Accepted Date: 18 December 2020

Publish Date: 28 March 2021

Abstract

Abstract

BACKGROUND
As an important mineralization element, mercury is widely distributed in different geological bodies and participates in diagenesis and mineralization. With the rapid development of mass spectrometry technology, the field of mercury isotope geochemistry has made remarkable progress. Mercury isotopes have been widely used to trace the biogeochemical processes of the earth's surface and mercury pollution. In recent years, mercury isotopes have been applied to reveal the evolution of planets, identify large igneous provinces in geological history, and trace the sources of mineral deposits.
OBJECTIVES
To summarize the mercury isotope compositions of different geological reservoirs (meteorites, terrestrial rocks, coal, sediments, volcanic emissions, epithermal deposits) and investigate the factors controlling the Hg isotope fractionation during ore-forming processes in epithermal deposits.
METHODS
Literature reviewed that included published data from this research group and others.
RESULTS
Based on previous studies, the isotope composition of mercury in different geological reservoirs was systematically studied. The mercury isotopic composition of geological reservoirs such as meteorites, magmatic rocks, metamorphic rocks, sedimentary rocks, and volcanic gases varied greatly, and some samples also contained non-mass fractionation information. The occurrence and isotopic composition characteristics of low-temperature hydrothermal deposits (modern hot springs, mercury deposits, lead-zinc deposits, antimony deposits, gold deposits) was the focus of this review, and the basic framework of the mercury isotope system construction. Combined with the latest research results, a comprehensive summary of the mercury isotope fractionation mechanism that may have occurred in the mineralization process of the deposit was carried out. The mass fractionation of mercury isotopes in hydrothermal deposits may be caused by fluid volatilization or boiling, condensation, redox reactions, and sulfide precipitation. The non-mass fractionation of mercury isotopes in rocks and ores may be the product of mercury photochemistry during the geological history, or the inheritance of a specific source rock information.
CONCLUSIONS
In the future, mercury isotope has great application potential in tracing the ore-forming source of low-temperature hydrothermal deposits and characterizing the evolution of ore-forming fluids.
- mercury isotopes /
- isotopic fractionation /
- tracing ore-forming processes /
- geological reservoirs /
- hydrothermal deposit

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References

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