Rb-Sr Isochron Age of Single-Grain Muscovite in the Xushan W-Cu Deposit, Central Jiangxi Province, and Its Geological Significance
详细信息
- 责任者：Li Guanglai (State Key Laboratory for Mineral Deposits Research ; Nanjing University ; Nanjing 210093 ; China) ; Hua Renmin
- 刊名：Earth Science
- 出版年：2011
- 卷期：36(2)
- 关键词：钨矿 ; tungsten ores ; 铜矿 ; copper ores ; 铷—锶计时 ; Rb-Sr dating ; 江西 ; Jiangxi Province
- 页码：p.282-288
- 图表：4 illus., 1 table, 26 refs.
- 分类号：1001
- issnNo：ISSN1000-2383
- isbnNo：CN42-1233/P
摘要
The Xushan tungsten-copper deposit is located in the central part of Jiangxi Province. It is a trinity deposit comprising three types of ore-bodies, i.e. quartz vein type, skarn type, and granite type. Rb-Sr micro-isochron method is first applied to determining the ore-forming age by using single grain of muscovite growing at the edge of the wolframite-quartz vein type tungsten ore. The result shows that the mineralization age is 147.1±3.4 Ma, with MSWD=0.71, and the ISr value is 0.849±0.026. This ore-forming age is similar to those of quartz-wolframite-vein tungsten deposits in southern Jiangxi Province, but is much later than the ages of copper deposits in northeastern Jiangxi and slightly earlier than the ages of copper deposits in northwestern Jiangxi.