Re-Os Dating of the Molybdenite from the Jinchuantang Tin-Bismuth Deposit in Hunan Province
详细信息
- 责任者：Liu Xiaofei (State Key Laboratory of Geological Processes and Mineral Resources ; School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Yuan Shunda
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(1)
- 关键词：锡矿 ; tin ores ; 铋矿 ; bismuth ores ; 铼—锇计时 ; Re-Os dating ; 湖南 ; Hunan Province
- 页码：p.39-51
- 图表：7 illus., 2 tables, 69 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
///The Jinchuantang deposit is a large-sized skarn-type tinbismuth deposit in the Dongpo ore field.Direct Re-Os dating on molybdenites collected from the skarn ore in the Jinchuantang deposit have been carried out,in order to further restrict the age of mineralization.The results show that Re-Os model ages range from (157.2 ±2.8) Ma to (162.4±2.4) Ma,with an average of (159.8±2.9) Ma,and give an isochron age of (158.8±6.6) Ma. Coupled with previous studies in this region,it is suggested that mantle components were extensively involved in the petrologenic and metallogenic processes of the Mesozioc W-Sn polymetallic ore district,southern Hunan Province,indicating that the Middle-Late Jurassic explosive mineralization of this region is probably as results of crust-mantle interactions under a geodynamic setting of the lithospheric thinning and extension.