Indosinian Orogenesis of the Tengchong-Lianghe Block,Western Yunnan: Evidence from Zircon U-Pb Dating and Petrogenesis of Granitoids

• 责任者：Li Zaihui (Chengdu Institute of Geology and Mineral Resources ; Chengdu 610081 ; China) ; Lin Shiliang
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2010
• 卷期：29(3)
• 关键词：花岗岩类 ; granitoid ; 铀—铅计时 ; U-Pb dating ; 云南 ; Yunnan Province
• 页码：p.298-312
• 图表：8 illus., 3 tables, 69 refs.
• 分类号：0801
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

In this paper, ages of Late Permian-Middle Triassic peraluminous granites in this area were obtained for the first time. Granitoid bodies are distributed near southeastern Lianghe County. The major rock types include mainly grayish medium-grained two-mica granite and subordinately gray fine-grained two-mica granite in the form of bosses or dikes one to several meters in width scattered in medium-grained two-mica granite.  Combined with available data, it is held that the generation of the collisional strongly-peraluminous granite in the Late Permian-Middle Triassic period suggests an orogenic event during early Indosinian in the Sanjiang Paleo-Tethys Sea.