Paleocene-Eocene Tectonic Evolution in Central Tibetan Plateau
详细信息
- 责任者：Wu Zhenhan (Institute of Geomechanics ; CAGS ; Beijing 100081 ; China) ; Hu Daogong
- 刊名：Acta Geoscientica Sinica
- 出版年：2009
- 卷期：30(6)
- 关键词：古构造 ; paleotectonics ; 青藏高原 ; Qinghai-Tibetan Plateau
- 页码：p.749-760
- 图表：5 illus., 2 tables, 31 refs.
- 分类号：0300
- issnNo：ISSN1006-3021
- isbnNo：CN11-3474/P
摘要
Large-scale thrust systems formed in Paleocene-Eocene in central Tibetan Plateau, e.g. Gangdese Thrust System (GTS),West Namco Thrust (WNT), Lunpola Thrust System (LTS), North Tanggula Thrust (NTS) and South Kunlun sinistral-slip thrust faults (SKF), and major thrust systems evidently controlled formation and evolution of Paleocene-Eocene basins. Regional magmatic plutonism and volcanic eruptions occurred in Gangdese areas in Paleocene-Early Eocene, and Sr/Y-Y geochemistry indicates that these magmatic rocks belong to island-arc magma caused by subduction of remained oceanic plate. Paleocene-Early Eocene subduction of remained oceanic plate transferred to subduction of India continental plate in 46～45 Ma.