Study of Fluid Inclusion Characteristic and Genetic Type of the Huachanggou Gold Deposit, West Qinling Orogen
详细信息
- 责任者：Zhou Zhenju (Key Laboratory of Mineralogy and Metallogeny ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Qin Yan
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(5)
- 关键词：金矿 ; gold ores ; 流体包裹体 ; fluid inclusions ; 秦岭 ; Qinling Mountains
- 页码：p.1311-1326
- 图表：9 illus., 1 table, 55 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The Huachanggou gold deposit, Shaanxi Province,is located in the southern edge of Mianlue suture zone of the West Qinling Orogen. In the quartz of Huachanggou gold deposit, four types of fluid inclusions (FIs) are identified as CO2-H2O, pure CO2, H2O-solution and daughter mineral-bearing. Fluid inclusions in late-stage quartz are H2O-solution with low homogenization temperatures (118~228 ℃) and low salinities (0.18%~6.59% NaCleqv). Minimum trapping pressures estimated from CO2-H2O inclusions are 70~195 MPa for middle stages, suggesting that gold mineralization occurred at the depths of 5~7 km. Fluid immiscibility caused gold precipitation in the middle-stage. The ore-forming fluid-system of the Huachanggou gold deposit is same to the orogenic-type. The Huachanggou gold deposit is a mesozonal to epizonal orogenic gold deposit.
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