Co-seismic and cumulative offsets of the recent earthquakes along the Karakax left-lateral strike-slip fault in western Tibet

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	Co-seismic and cumulative offsets of the recent earthquakes along the Karakax left-lateral strike-slip fault in western Tibet
	Li, HB (Li, Haibing); Van der Woerd, J (Van der Woerd, Jerome); Sun, ZM (Sun, Zhiming); Si, JL (Si, Jialiang); Tapponnier, P (Tapponnier, Paul); Pan, JW (Pan, Jiawei); Liu, DL (Liu, Dongliang); Chevalier, ML (Chevalier, Marie-Luce)
刊名	GONDWANA RESEARCH
	2012
卷号	21 期号:1 页码:64-87
关键词	Altyn Tagh fault Karakax fault Co-seismic offset Earthquake recurrence time Characteristic slip Tibetan plateau
ISSN号	1342-937X
英文摘要	The 400 km-long Karakax left-lateral strike-slip fault is the westernmost segment of the Altyn Tagh fault. It separates northwestern Tibet to the south from the Tarim basin to the north. The western section of the Karakax fault exhibits clear co-seismic surface ruptures of past large earthquakes. Geomorphic offset measurements from the field and high-resolution Ikonos images along 1.5 km across the Sanshiliyingfang fan and along 55 km of the fault, range from 3 to 28 m, with distinct clusters at 6 +/- 2(3), 14 +/- 2, 19 +/- 2 and 24 +/- 3 m. The cluster of the smallest offsets around 6 m (full range from 3 to 10 m) distributed over a minimum length of 55 km, is attributed to the last largest surface rupturing event that testifies of the occurrence of a magnitude Mw 7.4-7.6 earthquake along the Karakax fault. We interpret the other offset clusters as the possible repetition of similarly sized events thus favoring a characteristic slip model for the Karakax fault. In a 3 m-deep trench dug across the active trace of the fault we can identify the main rupture strands of the last and penultimate events. The penultimate event horizon, a silty-sand layer, has been radiocarbon dated at 975-1020 AD (AMS C-14 age). It is proposed that large Mw 7.4-7.6 events with co-seismic slip of about 6 m rupture the Karakax fault with a return time of about 900 years implying an average slip-rate of about 6-7 mm/years during the late Holocene. These results suggest that the Karakax fault is the largest left-lateral strike-slip fault at the rim of northwestern Tibet accommodating eastward movement of Tibet due to the India-Eurasia collision. (C) 2011 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
学科主题	构造地质学
WOS关键词	ALTYN-TAGH FAULT ; SAN-ANDREAS FAULT ; 2001 KOKOXILI-EARTHQUAKE ; NORTHERN TIBET ; KUNLUN FAULT ; SURFACE RUPTURE ; ACTIVE FAULTS ; HAIYUAN FAULT ; TECTONIC IMPLICATIONS ; SOUTHERN-CALIFORNIA
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000300204400006
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39742]
专题	中国地质调查局
作者单位	Inst Phys Globe, F-75005 Paris, France
推荐引用方式 GB/T 7714	Li, HB ,Van der Woerd, J ,Sun, ZM ,et al. Co-seismic and cumulative offsets of the recent earthquakes along the Karakax left-lateral strike-slip fault in western Tibet[J]. GONDWANA RESEARCH,2012,21(1):64-87.
APA	Li, HB .,Van der Woerd, J .,Sun, ZM .,Si, JL .,Tapponnier, P .,...&Chevalier, ML .(2012).Co-seismic and cumulative offsets of the recent earthquakes along the Karakax left-lateral strike-slip fault in western Tibet.GONDWANA RESEARCH,21(1),64-87.
MLA	Li, HB ,et al."Co-seismic and cumulative offsets of the recent earthquakes along the Karakax left-lateral strike-slip fault in western Tibet".GONDWANA RESEARCH 21.1(2012):64-87.