Understanding Hydrothermal Ore Deposits

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Deposits".

Deadline for manuscript submissions: 31 July 2024 | Viewed by 1118

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State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China
Interests: orogenic gold-antimony deposit; alkaline granite-related rare metal deposit; P-T-fluid-deformation regime; tracing PVTx of ore formation in absolute time
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Dear Colleagues,

Ore deposits continuously provide a mass of valuable resources for human society. With the development of analytical instruments, high-precision in situ analysis has been a critical means of understanding hydrothermal ore deposits. This provides us a unique window for investigating various aspects of ore deposits, ranging from the tectonic background, source and evolution of ore fluids, to mineralization factors (e.g., P-T-X conditions, the redox environment, and the water content). This Special Issue is focused on relevant topics, including but not limited to (1) exploration and deposit geochemistry; (2) the mineral chemistry of ores, gangue minerals, and accessory minerals that hold significant clues about metal deposition; (3) the geochronology of ore deposits; and (4) the application and development of in situ analyses in ore-deposit-related studies.

Prof. Dr. Kunfeng Qiu
Guest Editor

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Keywords

  • ore deposits
  • in situ analysis
  • geochemistry
  • geochronology
  • fluid evolution
  • ore-forming process
  • metal transport and deposition

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Published Papers (1 paper)

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Research

18 pages, 6106 KiB  
Article
Genesis and Formation of the Tuwaishan Gold Deposit in Hainan Island, South China: Implications from H-O-S Isotopes
by Yuheng Liu, Jingwen Mao, Jun Hu, Lei Wang and Deming Xu
Minerals 2023, 13(8), 1082; https://doi.org/10.3390/min13081082 - 14 Aug 2023
Viewed by 721
Abstract
The Tuwaishan gold deposit is located at the northeastern end of the Gezhen shear zone in the western part of Hainan Island, South China. It is one of a series of similar gold deposits hosted in the Mesoproterozoic basement rocks and structurally controlled [...] Read more.
The Tuwaishan gold deposit is located at the northeastern end of the Gezhen shear zone in the western part of Hainan Island, South China. It is one of a series of similar gold deposits hosted in the Mesoproterozoic basement rocks and structurally controlled by the Gezhen shear zone. The hydrothermal ore-forming period can be divided into quartz-pyrite-arsenopyrite stage, quartz-pyrite-base metal sulfides stage and quartz-carbonate stage. Eleven gold-bearing quartz vein samples yield δDV-SMOW and δ18OV-SMOW values of −75.9‰ to −54.4‰ and +8.1‰ to +13.7‰, respectively, and the corresponding δ18Owater values range from +3.1‰ to +8.7‰. In addition, the pyrite separates from 14 ore samples yield δ34S values of +4.5‰ to +7.9‰. The H-O-S isotopic data, along with fluid properties of the Tuwaishan and other gold deposits along the Gezhen shear zone, suggest that the ore-forming fluid and materials are of metamorphic rather than magmatic origin. Hence, we propose that the Tuwaishan gold deposit is best classified as orogenic gold deposit that resulted from regional metamorphism. Considering that the Mesoproterozoic basement rocks have experienced amphibolite facies metamorphism prior to the gold mineralization, the metamorphic devolatilization of the Ordovician-Silurian rocks at depth would provide a realistic source of fluid, gold and sulfur for the Tuwaishan and other gold deposits of the Gezhen gold belt. Full article
(This article belongs to the Special Issue Understanding Hydrothermal Ore Deposits)
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