Zircon LA-ICP-MS U-Pb Dating of Granitic Gneisses from Wuzhi Mountains Area, Hainan Province , and Its Geological Significances
详细信息
- 责任者：Chen Xinyue (Institute of Geology ; Hunan University of Science and Technology ; Xiangtan 411201 ; China) ; Wang Yuejun
- 刊名：Geochimica
- 出版年：2011
- 卷期：40(5)
- 关键词：花岗质片麻岩 ; granitic gneiss ; 铀—铅计时 ; U-Pb dating ; 五指山 ; Wuzhi Mountains
- 页码：p.454-463
- 图表：4 illus., 1 table, 57 refs.
- 分类号：0802
- issnNo：ISSN0379-1726
- isbnNo：CN44-1398/P
摘要
Syntectonic granitic gneisses with NW-trending gneissic foliations are widely distributed in Wuzhi Mountains area, Hainan Island.LA-ICP-MS zircon U-Pb dating of four samples yielded crystallization ages of 263~269 Ma, representing a key thermal-tectonic event in the Middle Permian. Combined with previous work, the dating results for the Wuzhi Mountains orthogneiss suggest the Wuzih Mountains syntectonic granitic gneisses were derived from the convergence of South China with Indochina Blocks. This age (263~269 Ma) might represent the initial time of the collision between South China and Indochina Blocks.