Ore-Forming Fluids of the Longbohe Copper Deposit in Jinping, Yunnan Province

详细信息   

• 责任者：Cui Yinliang （Yunnan Bureau of Nonferrous Metals Geology ; Kunming 650051 ; China） ; Jiang Shunde
• 刊名：Geology and Prospecting
• 出版年：2008
• 卷期：44(2)
• 关键词：铜矿 ; copper ores ; 云南 ; Yunnan
• 页码：p.55-61
• 图表：2 illus., 6 tables, 17 refs.
• 分类号：1001
• issnNo：ISSN0459-5331
• isbnNo：CN11-2043/P

摘要

Based on analyses of primary fluid inclusions, hydrogen and oxygen isotopes, it was considered that ore-forming fluids in the Longbohe copper deposit are typical high-degree mineralizing Na+-Ca2+ chloride type with intermediate temperature, intermediate-high salinity and intermediate-high density. The fluids are mainly originated from mixed magmatic, underground thermal brine and metamorphic water. From volcanogenic sedimentary metallogenic epoch to hydrothermal metallogenic epoch, temperature, salinity, pressure density of the fluids gradually dropped. Ore-forming process of volcanogenic sedimentary metallogenic epoch was neutral to weak acidic environment comparing with hydrothermal metallogenic epoch, the later period was more obviously an acidic and oxidized condition, and displayed increase of its oxidized and open degree.