气候变化领域集成服务门户(CCPortal): Age constraints on the India-Asia collision derived from secondary remanences of Tethyan Himalayan sediments from the Tingri area

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DOI	10.1016/j.jseaes.2012.10.012
	Age constraints on the India-Asia collision derived from secondary remanences of Tethyan Himalayan sediments from the Tingri area
	Liebke, Ursina; Appel, Erwin; Ding, Lin; Zhang, Qinghai
通讯作者	Liebke, U (通讯作者)
发表日期	2013
ISSN	1367-9120
EISSN	1878-5786
起始页码	329
结束页码	340
卷号	62
英文摘要	We report paleomagnetic results from the Zhepure Shan Formation and the Youxia Formation of the Tingri section (28 42'N/86 degrees 43'E) and the Longjiang section (28 degrees 27'N/86 degrees 40'E) in southern Tibet. A lower coercive component demagnetized below 30 mT and a higher coercive component demagnetized between 30 mT and 100 mT were separated. Rockmagnetic analyses reveal magnetite as the remanence carrier. The differences in coercivity are probably due to a wider grain size spectrum and therefore different domain states. Remanence directions of the low-coercive component are highly scattered and were not considered for further analysis. Directions of the high coercive component of Members A-C of the Zhepure Shan Fm are fairly well grouped within sites (k > 8 for most sites) whereas those of Member D and the overlying Youxia Fm are highly dispersed. Applied fold tests indicate a postfolding remanence for Members A-C. The latest possible time for remanence acquisition of Members A-C is constrained to a mean of 48 Ma by comparing the determined paleolatitudes to the curve of expected paleolatitudes versus age, calculated from the APWP of India. Deformation of the rocks is likely related to India-Asia collision and therefore the remanence age yields a constraint on the latest possible age of the India-Asia collision. In consideration of an extended pre-collisional northern Indian margin (Greater India) the determined values of 48 Ma (mean) and 37 Ma (youngest possible age within 95% confidence limits) underestimate the age of the continental collision. (C) 2012 Elsevier Ltd. All rights reserved.
关键词	SOUTHERN TIBET CONTINENTAL COLLISION STRUCTURAL EVOLUTION TECTONIC EVOLUTION PALEOMAGNETIC DATA UHP METAMORPHISM HISTORY BASIN INITIATION NORTH
英文关键词	Paleomagnetism; Himalaya; Continent-continent collision
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000315076500024
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
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/258153
推荐引用方式 GB/T 7714	Liebke, Ursina,Appel, Erwin,Ding, Lin,et al. Age constraints on the India-Asia collision derived from secondary remanences of Tethyan Himalayan sediments from the Tingri area[J]. 中国科学院青藏高原研究所,2013,62.
APA	Liebke, Ursina,Appel, Erwin,Ding, Lin,&Zhang, Qinghai.(2013).Age constraints on the India-Asia collision derived from secondary remanences of Tethyan Himalayan sediments from the Tingri area.JOURNAL OF ASIAN EARTH SCIENCES,62.
MLA	Liebke, Ursina,et al."Age constraints on the India-Asia collision derived from secondary remanences of Tethyan Himalayan sediments from the Tingri area".JOURNAL OF ASIAN EARTH SCIENCES 62(2013).