气候变化领域集成服务门户(CCPortal): Paleomagnetic constraints on the Cenozoic kinematic evolution of the Pamir plateau from the Western Kunlun Shan foreland

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DOI	10.1016/j.tecto.2013.05.040
	Paleomagnetic constraints on the Cenozoic kinematic evolution of the Pamir plateau from the Western Kunlun Shan foreland
	Li, Zhenyu; Ding, Lin; Lippert, Peter C.; Wei, Honghong
通讯作者	Li, ZY (通讯作者)
发表日期	2013
ISSN	0040-1951
EISSN	1879-3266
起始页码	257
结束页码	271
卷号	603
英文摘要	Thick Cenozoic marine and terrestrial sediments are widely distributed along the perimeter of the Pamir plateau and provide valuable information on the kinematic evolution of the region. Here, we report new biostratigraphic and paleomagnetic results from the piedmont of the Western Kunlun Shan to constrain the magnitude and timing of vertical-axis rotations along the eastern margin of the Pamir. Sampling sites were selected by rock formations and ages, which are based on previous field mapping and on litholostratigraphic and biostratigraphic work presented here. Thermomagnetic analysis, step-wise thermal demagnetization behavior, and positive field tests all suggest that the characteristic remanent magnetization (ChRM) directions most probably have a primary detrital and chemical origin. Our results indicate variable, minor, but in some intervals significant vertical axis rotations with respect to a stable Asian reference frame. This pattern of rotations is similar to paleomagnetic data reported in previously published studies from the Eastern Pamir foreland. In contrast, published paleomagnetic data from the Western Pamir foreland consistently indicate significant CCW rotations within that region. Collectively, these results challenge simple oroclinal bending models for the origin of the Pamir salient, and instead are more consistent with an asymmetric half-orocline kinematic model in which the curvature of the Western Pamir is the product of a combination of lithospheric bending of an originally quasi-linear mountain belt and radial thrusting, and the subdued curvature of the eastern edge of the plateau is the result of lateral translation of the Pamir plateau northward past Tibet and Tarim along the Kashgar-Yecheng transfer system. Our results are consistent with activity on the Kashgar-Yecheng transfer system in the Early Miocene. (C) 2013 Elsevier B.V. All rights reserved.
关键词	ALTYN-TAGH FAULT DAY CRUSTAL DEFORMATION CRETACEOUS RED BEDS KUSH SEISMIC ZONE TARIM BASIN CENTRAL-ASIA TIAN-SHAN TIEN-SHAN TECTONIC EVOLUTION TIBET IMPLICATIONS
英文关键词	Pamir; Half-orocline kinematic model; Vertical-axis rotation; Paleomagnetism; Kashgar-Yecheng transfer system
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000324450100019
来源期刊	TECTONOPHYSICS
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/258171
推荐引用方式 GB/T 7714	Li, Zhenyu,Ding, Lin,Lippert, Peter C.,et al. Paleomagnetic constraints on the Cenozoic kinematic evolution of the Pamir plateau from the Western Kunlun Shan foreland[J]. 中国科学院青藏高原研究所,2013,603.
APA	Li, Zhenyu,Ding, Lin,Lippert, Peter C.,&Wei, Honghong.(2013).Paleomagnetic constraints on the Cenozoic kinematic evolution of the Pamir plateau from the Western Kunlun Shan foreland.TECTONOPHYSICS,603.
MLA	Li, Zhenyu,et al."Paleomagnetic constraints on the Cenozoic kinematic evolution of the Pamir plateau from the Western Kunlun Shan foreland".TECTONOPHYSICS 603(2013).