气候变化领域集成服务门户(CCPortal): A Paleoseismic Record Spanning 2-Myr Reveals Episodic Late Pliocene Deformation in the Western Qaidam Basin, NE Tibet

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DOI	10.1029/2020GL090530
	A Paleoseismic Record Spanning 2-Myr Reveals Episodic Late Pliocene Deformation in the Western Qaidam Basin, NE Tibet
	Lu, Yin; Marco, Shmuel; Wetzler, Nadav; Fang, Xiaomin; Alsop, G. Ian; Hubert-Ferrari, Aurelia
通讯作者	Lu, Y (通讯作者)
发表日期	2021
ISSN	0094-8276
EISSN	1944-8007
卷号	48 期号:5
英文摘要	The western Qaidam Basin, NE Tibet contains numerous NW-SE-trending thrusts that extend over a distance of similar to 300 km along the Altyn Tagh Fault and north of the Kunlun Range. However, little is known about the long-term seismo-tectonic evolution of this active thrust zone due to the absence of an extended paleoseismic record. We present a 2-Myr-long disturbance record established from a core drilled on the crest of a thrust-cored anticline. Based on detailed sedimentological analysis, the disturbances (micro-faults, soft-sediment deformation, slumps, and detachment surfaces) are interpreted as paleoearthquake/tectonic indicators. The core records five seismite clusters which occurred at 3.6-3.5, 3.4-3.2, 3.15-3.1, 3.0-2.9, and 2.8-2.75 Ma. This suggests the rate of tectonic strain accommodated by the folds and thrusts in the region varies and thus reveals episodic local deformation. During the clusters, regional deformation is concentrated more in the fold-and-thrust system than along regional major strike-slip faults.
关键词	ALTYN-TAGH FAULT SOFT-SEDIMENT DEFORMATION HISTORIC EARTHQUAKES LAKE-SEDIMENTS SLIP-RATE OBLIQUE SYSTEM GROWTH RATES RECONSTRUCTION
英文关键词	paleoseismology; regional deformation; seismites; seismo‐ tectonic evolution; slump; soft‐ sediment deformation
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000627892100085
来源期刊	GEOPHYSICAL RESEARCH LETTERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260513
推荐引用方式 GB/T 7714	Lu, Yin,Marco, Shmuel,Wetzler, Nadav,et al. A Paleoseismic Record Spanning 2-Myr Reveals Episodic Late Pliocene Deformation in the Western Qaidam Basin, NE Tibet[J]. 中国科学院青藏高原研究所,2021,48(5).
APA	Lu, Yin,Marco, Shmuel,Wetzler, Nadav,Fang, Xiaomin,Alsop, G. Ian,&Hubert-Ferrari, Aurelia.(2021).A Paleoseismic Record Spanning 2-Myr Reveals Episodic Late Pliocene Deformation in the Western Qaidam Basin, NE Tibet.GEOPHYSICAL RESEARCH LETTERS,48(5).
MLA	Lu, Yin,et al."A Paleoseismic Record Spanning 2-Myr Reveals Episodic Late Pliocene Deformation in the Western Qaidam Basin, NE Tibet".GEOPHYSICAL RESEARCH LETTERS 48.5(2021).