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DOI	10.1016/j.gr.2011.07.019
	Paleomagnetic results from the Early Cretaceous Zenong Group volcanic rocks, Cuoqin, Tibet, and their paleogeographic implications
	Chen, Weiwei; Yang, Tianshui; Zhang, Shihong; Yang, Zhenyu; Li, Haiyan; Wu, Huaichun; Zhang, Junhong; Ma, Yiming; Cai, Fulong
通讯作者	Yang, TS (通讯作者)
发表日期	2012
ISSN	1342-937X
起始页码	461
结束页码	469
卷号	22 期号:2
英文摘要	A paleomagnetic study has been carried out on the Early Cretaceous Zenong Group volcanic rocks (ca. 110 130 Ma) near Cuoqin town in the central Lhasa terrane. Stepwise thermal demagnetization up to 680 degrees C isolated a stable high-temperature component (HTC) including antipodal dual polarities. The HTC directions passed both a fold test at 99% confidence and a reversal test at 95% confidence, suggesting a primary origin. The tilt-corrected average direction for 18 sites is D = 327.0 degrees, I = 35.7 degrees, K = 59.3 degrees, alpha(95) = 4.5 degrees, which corresponds to a paleopole at 58.2 degrees N, 341.9 degrees E (A(95) = 4.6 degrees), yielding a paleolatitude of 19.8 degrees +/- 4.6 degrees N for the study area. Our results, combined with previous paleomagnetic data, suggest that southern Tibet was at a mean paleolatitude of 20 degrees N during the Cretaceous and Paleogene. When compared with the apparent polar wander paths of Asia, the difference suggests that only ca. 870 km north-south crustal shortening has accumulated between the Lhasa terrane and stable Asia since ca. 110 Ma. When comparing the paleolatitudes of the Lhasa terrane and India, the results indicate that the width of the Neotethys was 6720 +/- 690 km during the Early Cretaceous. (c) 2011 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
关键词	INDIA-ASIA COLLISION ALTYN TAGH FAULT TECTONIC EVOLUTION LHASA BLOCK GEOMAGNETIC-FIELD SOUTHERN TIBET CENOZOIC TECTONICS MAGNETIC-FIELD LINZHOU BASIN WESTERN TIBET
英文关键词	Lhasa terrane; Paleomagnetism; Early Cretaceous; Crustal shortening; Neotethys
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000307602000008
来源期刊	GONDWANA RESEARCH
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/258038
推荐引用方式 GB/T 7714	Chen, Weiwei,Yang, Tianshui,Zhang, Shihong,et al. Paleomagnetic results from the Early Cretaceous Zenong Group volcanic rocks, Cuoqin, Tibet, and their paleogeographic implications[J]. 中国科学院青藏高原研究所,2012,22(2).
APA	Chen, Weiwei.,Yang, Tianshui.,Zhang, Shihong.,Yang, Zhenyu.,Li, Haiyan.,...&Cai, Fulong.(2012).Paleomagnetic results from the Early Cretaceous Zenong Group volcanic rocks, Cuoqin, Tibet, and their paleogeographic implications.GONDWANA RESEARCH,22(2).
MLA	Chen, Weiwei,et al."Paleomagnetic results from the Early Cretaceous Zenong Group volcanic rocks, Cuoqin, Tibet, and their paleogeographic implications".GONDWANA RESEARCH 22.2(2012).