Re-Os Dating of Molybdenite from Tongchanggou Mo-Polymetallic Deposit in Northwest Yunnan and Its Metallogenic Environment
详细信息
- 责任者：Li Wenchang (Yunnan Bureau of Geological Survey ; Kunming 650051 ; China) ; Yu Haijun
- 刊名：Mineral Deposits
- 出版年：2012
- 卷期：31(2)
- 关键词：钼矿 ; molybdenum ores ; 多金属矿 ; polymetallic ores ; 云南 ; Yunnan Province
- 页码：p.282-292
- 图表：5 illus., 2 tables, 38 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
The Tongchanggou Mo-polymetallic deposit lies in the western margin depression belt of the Yangtze landmass and is adjacent to Yidun island arc and Garze-Litang suture zone. The ore deposit is a large-size or even a superlarge deposit. Re-Os isotopic dating technique was applied, and six molybdenite samples were analyzed for Re-Os isotopic compositions, and the model ages obtained are from（82.34±1.28） to（88.27±1.23） Ma, with the isochron age being（85±10） Ma. The result suggests that Mo mineralization occurred in Yanshanian period, during which Zhongza block and Yangtze landmass collided intensively and gradually turned into post-collision stage.