Mesozoic sedimentary evolution of the northwest Sichuan basin: Implication for continued clockwise rotation of the South China block

doi:10.1130/B25407.1

	Mesozoic sedimentary evolution of the northwest Sichuan basin: Implication for continued clockwise rotation of the South China block
	Meng, QR ; Wang, E ; Hu, JM
刊名	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
	2005-03-01
卷号	117 期号:3-4 页码:396-410
关键词	Mesozoic Sedimentation Rotation Sichuan Basin Qinling Longmen Shan
ISSN号	0016-7606
DOI	10.1130/B25407.1
文献子类	Article
英文摘要	We present new sedimentary data integrated into a regional Mesozoic stratigraphic framework to provide a detailed picture of spatio-temporal variations in deposition and depocenter migration of the northwest Sichuan basin. The Mesozoic sedimentary evolution is utilized to interpret basin subsidence history and to unravel coeval basin-margin tectonics. The northwest Sichuan basin, together with the Songpan-Ganzi terrane, behaved as a passive margin south of the Qinling Paleo-Tethys from late Paleozoic to early Middle Triassic times and then evolved into a peripheral foreland basin in response to collision of the North and South China blocks since the late Middle Triassic. Coeval with strong north-south contraction of the Songpan-Ganzi terrane in the Late Triassic, sinistral transpressional deformation of the Longmen Shan belt led to flexural subsidence of the adjacent western Sichuan basin. Renewed basin-margin fold-thrust activity triggered recurrence of flexural subsidence of the northwest Sichuan basin since the Middle Jurassic, with the depocenter eventually shifting to the northwestern corner of the basin in the Early Cretaceous. Sedimentary evolution of the northwest Sichuan basin and the basin-margin deformation imply that the South China block had been rotating clockwise relative to the North China block throughout the Mesozoic with an interim period of Early Jurassic tectonic quiescence. A model is advanced that invokes clockwise rotation of the South China block as a driver for tectonic evolution of both the basin and adjoining structural belts and provides an explanation for several salient features that are otherwise puzzling.
WOS关键词	EASTERN TIBETAN PLATEAU ; GARZE FOLD BELT ; PALEOMAGNETIC CONSTRAINTS ; TECTONIC IMPLICATIONS ; YANGTZE BLOCK ; QINLING BELT ; LONGMEN-SHAN ; COLLISION ; DEFORMATION ; OROGEN
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000227480200010
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65774]
专题	中国科学院地质与地球物理研究所
通讯作者	Meng, QR
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Geosci, Inst Geomech, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Meng, QR,Wang, E,Hu, JM. Mesozoic sedimentary evolution of the northwest Sichuan basin: Implication for continued clockwise rotation of the South China block[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2005,117(3-4):396-410.
APA	Meng, QR,Wang, E,&Hu, JM.(2005).Mesozoic sedimentary evolution of the northwest Sichuan basin: Implication for continued clockwise rotation of the South China block.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,117(3-4),396-410.
MLA	Meng, QR,et al."Mesozoic sedimentary evolution of the northwest Sichuan basin: Implication for continued clockwise rotation of the South China block".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 117.3-4(2005):396-410.