LA-ICP-MS Zircon U-Pb Dating of Southern Menglian Granite in Tengchong Area of Western Yunnan Province and Its Tectonic Implications
详细信息
- 责任者：Luo Gai (Sichuan Institute of Geological Survey ; Chengdu 610081 ; China) ; Ji Xiaochuan
- 刊名：Geological Bulletin of China
- 出版年：2012
- 卷期：31(2)
- 关键词：花岗岩 ; granite ; 铀—铅计时 ; U-Pb dating ; 高黎贡山 ; Gaoligong Mountains ; 怒江 ; Nujiang River
- 页码：p.287-296
- 图表：5 illus., 3 tables, s refs.
- 分类号：0801
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
Gaoligong tectonic belt is located in the eastern Gangdise block, and Gaoligong granites in the western Yunnan Province constitute an important magmatic record of Gangdise tectonic movement. Research on the geochemical characteristics of Puchuan granites in the southern Menglian granites of Gaoligong tectonic belt suggests that these granites with strong peraluminous character can be assigned to high-K calc-alkaline granites. Geochemical and chronological data of these granites are consistent to those of granites in northern and central Gaoligong tectonic belts. The formation of Puchuan granites might have been a magmatic response to collision of Nujiang tectonic belt in the western Yunnan Province.