Geology, Mode of Occurrence of Gold and Isotopic Geochemistry of Chahansala Gold Deposit in <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on">West Tianshan</st1:place>, Xinjiang <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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weight: bold" lang=EN-US>Geology, Mode of Occurrence of Gold and Isotopic Geochemistry of Chahansala Gold Deposit in oft-com:office:smarttags" />West Tianshan, Xinjiang oft-com:office:office" />

详细信息

责任者：Luo Xiaoping (State Key Laboratory of Geological Processes and Mineral Resources ; Faculty of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Xue Chunji
刊名：Mineral Deposits
出版年：2009
卷期：28(5)
关键词：金矿 ; gold ores ; 天山 ; Tianshan Mountains
页码：p.558-568
图表：11 illus., 3 tables, 21 refs.
分类号：1001
issnNo：ISSN0258-7106
isbnNo：CN11-1965/P

摘要

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///The Chahansala gold deposit, a newly discovered gold deposit in oft-com:office:smarttags" />West Tianshan, is located at the west edge of the Late Paleozoic Yilianhabi’erga arc-trench belt. Ore bodies are in the form of irregular veins and mainly occur in the shatter zone of fine-grained diorite that has intruded in the Upper Carboniferous tuffaceous siltstone and subordinately exist in the contact zone, with weak wall rock alteration. Studies of fluid inclusions in some gangue minerals show that temperatures of the ore-forming fluids are 220～340℃, δD values of the hydrothermal gangue mineral quartz are -92‰～-74‰, the δ¹⁸OV-SMOW are 11.8‰～12.6‰, suggesting that ore-forming fluids are made up of magmatic water and formational water. δ¹³CV-PDB values of the hydrothermal gangue mineral calcite are -8.92‰～-8.06‰, and δ¹⁸OV-SMOW values are 13.45‰～17.18‰, implying that CO₂ in the ore-forming fluids was mainly derived from the mantle-derived carbon. The ²⁰⁶Pb/²⁰⁴Pb of ore sulfides are 18.036～18.173, ²⁰⁷Pb/²⁰⁴Pb are 15.536～15.612, and ²⁰⁸Pb/²⁰⁴Pb are 37.940～38.097, indicating that the ore metals were derived from the magma. The δ³⁴SV-CDT of sulfides are -9.8‰～-7.3‰, suggesting that the mineralization H₂S resulted from the crust.

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