气候变化领域集成服务门户(CCPortal): Paleomagnetic evidence for a mid-miocene clockwise rotation of about 25 degrees of the Guide Basin area in NE Tibet

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DOI	10.1016/j.epsl.2005.10.013
	Paleomagnetic evidence for a mid-miocene clockwise rotation of about 25 degrees of the Guide Basin area in NE Tibet
	Yan, MD; VanderVoo, R; Fang, XM; Pares, JM; Rea, DK
发表日期	2006
ISSN	0012-821X
EISSN	1385-013X
起始页码	234
结束页码	247
卷号	241 期号:1-2
英文摘要	Ten sections of Neogene molasse-type sediments were sampled in the Guide Basin of northeastern Tibet for magnetostratigraphy [X.M. Fang, M.D. Yan, R. Van der Voo, DR., Rea, C. Song, J.M. Pares, J. Gao, J. Nie, S. Dai, Late Cenozoic deformation and uplift of the NE Tibetan plateau: evidence from high resolution magnetostratigraphy of the Guide Basin, Qinghai Province, China, Geol. Soc. America Bull. 107 (2005) 1208-1225 [1]], but they also yield seven well-dated formation-mean directions that reveal changing declinations as rotations occurred in response to crustal deformation north of the India-Asia collision zone. Three formations are of early Miocene and Oligocene age, as indicated by fossils and magnetic reversal records, whereas four younger formations yield late Miocene and Pliocene ages. The dual-polarity magnetizations are typically antipodal, but reveal inclinations that are too shallow, most likely because of post-depositional inclination flattening. The late Miocene and younger directions show formation-mean declinations between 354 degrees and 7 degrees, whereas three early Miocene and late Oligocene mean declinations range from 31 degrees to 44 degrees. This indicates that a clockwise rotation of 25.1 +/- 4.6 degrees took place during the middle part of the Miocene (best estimate 11-17 Ma). No rotations appear to have occurred, during that time, in the Xining, Lanzhou, Linxia and Jingning basins (Longzhong Basin) to the northeast and east of the Guide Basin; however, a rotation of similar magnitude has been documented by Dupont-Nivet and colleagues for pre-Miocene (> 29 Ma) time in these areas. Collectively, these results show that the basins in NE Tibet have had independently evolving structural histories. (c) 2005 Elsevier B.V. All rights reserved.
关键词	ALTYN-TAGH FAULT SLIP-RATE KUNLUN FAULT QAIDAM BASIN HEXI CORRIDOR EASTERN TIBET WESTERN CHINA POLAR WANDER RED BEDS ASIA
英文关键词	Tibet; neogene; rotations; paleomagnetism; guide basin
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000234626300018
来源期刊	EARTH AND PLANETARY SCIENCE 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/257424
推荐引用方式 GB/T 7714	Yan, MD,VanderVoo, R,Fang, XM,et al. Paleomagnetic evidence for a mid-miocene clockwise rotation of about 25 degrees of the Guide Basin area in NE Tibet[J]. 中国科学院青藏高原研究所,2006,241(1-2).
APA	Yan, MD,VanderVoo, R,Fang, XM,Pares, JM,&Rea, DK.(2006).Paleomagnetic evidence for a mid-miocene clockwise rotation of about 25 degrees of the Guide Basin area in NE Tibet.EARTH AND PLANETARY SCIENCE LETTERS,241(1-2).
MLA	Yan, MD,et al."Paleomagnetic evidence for a mid-miocene clockwise rotation of about 25 degrees of the Guide Basin area in NE Tibet".EARTH AND PLANETARY SCIENCE LETTERS 241.1-2(2006).