Mesozoic and Cenozoic tectonic evolution of the Longmenshan fault belt

doi:10.1007/s11430-009-0053-8

	Mesozoic and Cenozoic tectonic evolution of the Longmenshan fault belt
	Wang ErChie; Meng QingRen
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2009-05-01
卷号	52 期号:5 页码:579-592
关键词	Wenchuan earthquake Longmenshan landslide flooding Chengdu Plain
ISSN号	1006-9313
DOI	10.1007/s11430-009-0053-8
文献子类	Article
英文摘要	The giant earthquake (M (s)=8.0) in Wenchuan on May 12, 2008 was triggered by oblique convergence between the Tibetan Plateau and the South China along the Longmenshan fault belt. The Longmenshan fault belt marks an important component of the tectonic and geomorphological boundary between the eastern and western part of China and has a protracted tectonic history. It was first formed as an intracontinental transfer fault, patitioning the differential deformation between the Pacific and Tethys tectonic domains, initiated in late Paleozoic-early Mesozoic time, then served as the eastern boundary of the Tibetan Plateau to accommodate the growth of the plateau in Cenozoic. Its current geological and geomorphological frameworks are the result of superimposition of these two tectonic events. In Late Triassic, the Longmenshan underwent left-slip oblique NW-SE shortening due to the clockwise rotation of the Yangtze Block, which led to the flexural subsidence of the Sichuan foreland basin, but after that, the subsidence of the Sichuan Basin seems no longer controlled by the tectonic activity of the Longmenshan fault belt. The Meosozoic tectonic evolution of the Songpan-Ganzi fold belt differs significantly compared with that of the Yangtze Platform, featured by intensive northeast and southwest shortening and resulted in the close of the Paleo-Tethys. Aerial photos taken immediately after main shock of the giant May 12, 2008 earthquake have documented extensive rock fall and landslides that represent one of the most destructive aspects of the earthquake. Both rock avalanches and landslides delivered a huge volume of debris into the middle part of the Minjiang River, and formed many dammed lakes. Breaching of these natural dams can be catastrophic, as occurred in the Diexi area along the upstream of the Minjiang River in the year of 1933 that led to devastating floodings. The resultant flood following the breaching of these dams flowed through and out of the Longmenshan belt into the Chengdu Plain, bringing a huge volume of sediments. The oldest alluvial deposits within the Chengdu Plain are estimated to be Late Miocene (8-13 Ma). We suggest that the flooding that transported the course-grained sediments into the Chengdu Plain occurred in late Cenozoic, resulted from both the climate and the historical earthquakes similar to the May 12 earthquake. Estimated age of the sediments related to earthquakes and coeval shortening across the Chengdu Plain indicate that the eastern margin of the plateau became seismically and tectonically active in Late Miocene.
WOS关键词	RESOLUTION MAGNETO STRATIGRAPHY ; POSITIONING SYSTEM MEASUREMENTS ; NE TIBETAN PLATEAU ; LOWER CRUSTAL FLOW ; GARZE FOLD BELT ; SOUTH CHINA ; EASTERN MARGIN ; QINGHAI PROVINCE ; SLIP RATES ; RED RIVER
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000265924500001
资助机构	Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; PetroChina Company Limited ; PetroChina Company Limited ; PetroChina Company Limited ; PetroChina Company Limited ; 40721003 ; 40721003 ; 40721003 ; 40721003 ; 40472121 ; 40472121 ; 40472121 ; 40472121 ; 40830314) ; 40830314) ; 40830314) ; 40830314) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; PetroChina Company Limited ; PetroChina Company Limited ; PetroChina Company Limited ; PetroChina Company Limited ; 40721003 ; 40721003 ; 40721003 ; 40721003 ; 40472121 ; 40472121 ; 40472121 ; 40472121 ; 40830314) ; 40830314) ; 40830314) ; 40830314) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; PetroChina Company Limited ; PetroChina Company Limited ; PetroChina Company Limited ; PetroChina Company Limited ; 40721003 ; 40721003 ; 40721003 ; 40721003 ; 40472121 ; 40472121 ; 40472121 ; 40472121 ; 40830314) ; 40830314) ; 40830314) ; 40830314) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; Knowledge Innovation Project of Chinese Academy of Sciences(KZCX2-YW-12) ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; National Natural Science Foundation of China(40672151 ; PetroChina Company Limited ; PetroChina Company Limited ; PetroChina Company Limited ; PetroChina Company Limited ; 40721003 ; 40721003 ; 40721003 ; 40721003 ; 40472121 ; 40472121 ; 40472121 ; 40472121 ; 40830314) ; 40830314) ; 40830314) ; 40830314)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71487]
专题	中国科学院地质与地球物理研究所
通讯作者	Wang ErChie
作者单位	Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang ErChie,Meng QingRen. Mesozoic and Cenozoic tectonic evolution of the Longmenshan fault belt[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2009,52(5):579-592.
APA	Wang ErChie,&Meng QingRen.(2009).Mesozoic and Cenozoic tectonic evolution of the Longmenshan fault belt.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,52(5),579-592.
MLA	Wang ErChie,et al."Mesozoic and Cenozoic tectonic evolution of the Longmenshan fault belt".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 52.5(2009):579-592.