气候变化领域集成服务门户(CCPortal): Paleogene sedimentation changes in Lenghu Area; Qaidam Basin in response to the India

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DOI	10.1007/s00531-018-1640-8
	Paleogene sedimentation changes in Lenghu Area; Qaidam Basin in response to the India–Eurasia collision
	Zhao R.; Chen S.; Wang H.; Yan D.; Cao H.; Gong Y.; He J.; Wu Z.
发表日期	2019
ISSN	14373254
起始页码	27
结束页码	48
卷号	108 期号:1
英文摘要	The Cenozoic India–Eurasia collision is evidently recorded in the Qaidam Basin, which is located in the north margin of the Tibetan Plateau. The present study describes a dextrorotary phenomenon at the end of the Eocene in Lenghu Area in the northern Qaidam Basin, discovered in sedimentary and tectonic records. This phenomenon is interpreted to have been a result of the levorotatory movement along the Altyn Tagh Fault (ATF) based on the following evidence. First, provenance, as analyzed by heavy mineral assemblages, was slightly deflected from southwestward to the westward by about 45°. Second, paleocurrent inferred from dip logging and seismic reflection changed clockwise by approximately 25°. Third, there is evidence of increases in fault activity in the area, especially in northwest–southeast-trending branches relative to older west–east-trending branches. Increases in faulting coincide with abrupt increases in sediment supply in the Oligocene, after earlier decreases based on total sand content during the Eocene. Our results demonstrate that the northern margin of the Tibetan Plateau synchronously responded to the initiation and termination of the India–Eurasia collision. The levorotatory strike slip of the ATF was immediately triggered by the complete collision at the end of Eocene, and the strike-slip movement caused the dextrorotary phenomenon in the Lenghu Area. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Altyn Tagh Fault; Dextrorotary transpression; India–Eurasia collision; Lenghu Area; Qaidam Basin
语种	英语
scopus关键词	arc-continent collision; fault zone; heavy mineral; logging (geophysics); Paleogene; provenance; sedimentation; seismic reflection; strike-slip fault; transpression; Altyn Tagh Fault Zone; China; Qaidam Basin; Qinghai
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147891
作者单位	Faculty of Earth Resources, China University of Geosciences, Wuhan, 430074, China; Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan, 430074, China; Chengdu University of Technology, Chengdu, 610059, China; Qinghai Oilfield Company, Petro China, Dunhuang, Gansu 736202, China
推荐引用方式 GB/T 7714	Zhao R.,Chen S.,Wang H.,等. Paleogene sedimentation changes in Lenghu Area; Qaidam Basin in response to the India–Eurasia collision[J],2019,108(1).
APA	Zhao R..,Chen S..,Wang H..,Yan D..,Cao H..,...&Wu Z..(2019).Paleogene sedimentation changes in Lenghu Area; Qaidam Basin in response to the India–Eurasia collision.International Journal of Earth Sciences,108(1).
MLA	Zhao R.,et al."Paleogene sedimentation changes in Lenghu Area; Qaidam Basin in response to the India–Eurasia collision".International Journal of Earth Sciences 108.1(2019).