Paleomagnetic Constraints From the Baoshan Area on the Deformation of the Qiangtang-Sibumasu Terrane Around the Eastern Himalayan Syntaxis

doi:10.1002/2017JB015112

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Paleomagnetic Constraints From the Baoshan Area on the Deformation of the Qiangtang-Sibumasu Terrane Around the Eastern Himalayan Syntaxis
	Li, Shihu 1,2; van Hinsbergen, Douwe J. J.3; Deng, Chenglong 2; Advokaat, Eldert L.3; Zhu, Rixiang 2
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2018-02-01
卷号	123 期号:2 页码:977-997
关键词	Tibetan Plateau Rotation Sibumasu Qiangtang Paleomagnetic
ISSN号	2169-9313
DOI	10.1002/2017JB015112
文献子类	Article
英文摘要	The Sibumasu Block in SE Asia represents the eastward continuation of the Qiangtang Block. Here we report a detailed rock magnetic and paleomagnetic study on the Middle Jurassic and Paleocene rocks from northern Sibumasu, to document the crustal deformation during the India-Asia collision since the Paleocene and reconstruct the overall strike of the Qiangtang/Sibumasu elements before the India-Asia collision. Although the fold test is inconclusive based solely on our data, a positive reversal test, a positive regional fold test with previous paleomagnetic results, and a detrital origin of hematite in the red beds as indicated by scanning electron microscopy suggest that the magnetizations obtained from the Jurassic and Paleocene rocks are most likely primary, showing an similar to 80 degrees clockwise rotation since Paleocene. These results, together with previously published paleomagnetic data, suggest that the northern Sibumasu and northern Simao elements experienced a similar to 60-80 degrees clockwise rotation since Paleocene. This large clockwise rotation is also consistent with the surface GPS velocity field and NE-SW fault networks, suggesting a rotational motion of crustal material from southeastern Tibet during late Cenozoic. We infer that the large clockwise rotation is a sum of rotation in the Eocene to Middle Miocene time associated with Indochina extrusion and rotation after the Middle Miocene associated with the E-W extension in central Tibet. This suggests that the eastward motion of Tibetan crustal material along the Xianshuihe-Xiaojiang fault after Middle Miocene is transmitted to the southwest toward Myanmar. Jurassic and Cretaceous paleomagnetic results suggest that the Qiangtang/northern Sibumasu was originally a curved structure with an orientation of N60 degrees W in Tibet and changes to N10 degrees W in southern Sibumasu.
WOS关键词	RIVER SHEAR ZONE ; LOWER-CRUSTAL FLOW ; GEOMAGNETIC SECULAR VARIATION ; SOUTHEASTERN TIBETAN PLATEAU ; CENOZOIC CLOCKWISE ROTATION ; RED-RIVER ; AILAO SHAN ; INDO-CHINA ; SE ASIA ; CONTINENTAL EXTRUSION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000428437500004
资助机构	National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; ERC(306810) ; ERC(306810) ; ERC(306810) ; ERC(306810) ; NWO(864.11.004) ; NWO(864.11.004) ; NWO(864.11.004) ; NWO(864.11.004) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; ERC(306810) ; ERC(306810) ; ERC(306810) ; ERC(306810) ; NWO(864.11.004) ; NWO(864.11.004) ; NWO(864.11.004) ; NWO(864.11.004) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; ERC(306810) ; ERC(306810) ; ERC(306810) ; ERC(306810) ; NWO(864.11.004) ; NWO(864.11.004) ; NWO(864.11.004) ; NWO(864.11.004) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; National Natural Science Foundation of China(41404056) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; State Key Laboratory of Lithospheric Evolution(11431780) ; ERC(306810) ; ERC(306810) ; ERC(306810) ; ERC(306810) ; NWO(864.11.004) ; NWO(864.11.004) ; NWO(864.11.004) ; NWO(864.11.004)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88326]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Li, Shihu; Deng, Chenglong
作者单位	1.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 3.Univ Utrecht, Dept Earth Sci, Utrecht, Netherlands
推荐引用方式 GB/T 7714	Li, Shihu,van Hinsbergen, Douwe J. J.,Deng, Chenglong,et al. Paleomagnetic Constraints From the Baoshan Area on the Deformation of the Qiangtang-Sibumasu Terrane Around the Eastern Himalayan Syntaxis[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(2):977-997.
APA	Li, Shihu,van Hinsbergen, Douwe J. J.,Deng, Chenglong,Advokaat, Eldert L.,&Zhu, Rixiang.(2018).Paleomagnetic Constraints From the Baoshan Area on the Deformation of the Qiangtang-Sibumasu Terrane Around the Eastern Himalayan Syntaxis.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(2),977-997.
MLA	Li, Shihu,et al."Paleomagnetic Constraints From the Baoshan Area on the Deformation of the Qiangtang-Sibumasu Terrane Around the Eastern Himalayan Syntaxis".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.2(2018):977-997.