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Paleomagnetism of the Late Cretaceous Red Beds From the Far Western Lhasa Terrane: Inclination Discrepancy and Tectonic Implications

文献类型：期刊论文

作者Bian, Weiwei1,2,3; Yang, Tianshui2,3; Jiang, Zelei2,3; Jin, Jingjie2,3; Gao, Feng2,3; Wang, Suo2,3; Peng, Wenxiao2,3; Zhang, Shihong2,3; Wu, Huaichun2; Li, Haiyan2
刊名TECTONICS
出版日期2020-08-01
卷号39期号:8页码:22
关键词Paleomagnetism Late Cretaceous Lhasa terrane Inclination discrepancy
ISSN号0278-7407
DOI10.1029/2020TC006280
英文摘要The precollisional locations and geometries of the Lhasa terrane (LT) are critical to constrain the India-Asia collision. However, the inclinations of the Cretaceous paleomagnetic data obtained from the northern limb of folds are obviously lower than those obtained from the southern limb, which cause large discrepant paleolatitudes of the LT prior to India-Asia collision. Here, we carried out a new paleomagnetic investigation on the Late Cretaceous Jingzhushan Formation red beds in the far western LT. The tilt-corrected site mean direction yielded a palaeopole at 74.4 degrees N, 226.0 degrees E with A(95) = 3.8 degrees (N = 54). This paleomagnetic data set passes fold tests and indicates that the studied area was located at 19.6 degrees +/- 3.8 degrees N during the Late Cretaceous. However, the mean inclination calculated from the northern limb of folds (I-s = 19.0 degrees) is significantly lower than that of the southern limb of folds (I-s = 51.8 degrees). This inclination discrepancy of the Jingzhushan Formation red beds may be attributed to the syntectonic sedimentation. Nevertheless, the site mean direction obtained from both limbs of folds is generally consistent with the site mean direction after syntectonic-sedimentation correction. Our new paleomagnetic results, combined with the reliable Cretaceous paleomagnetic results from the LT showed that the southern margin of Asia had a present-day relatively east-west alignment prior to India-Asia collision.
WOS关键词SOUTHERN MARGIN ; VOLCANIC-ROCKS ; MAGNETIC-SUSCEPTIBILITY ; TETHYAN HIMALAYA ; REMANENT MAGNETIZATION ; COLLISION PROCESS ; TIBETAN PLATEAU ; LINZHOU BASIN ; GREATER INDIA ; EURASIA PRIOR
资助项目National Natural Science Foundation of China[41572205] ; National Natural Science Foundation of China[41830215] ; Fundamental Research Funds for the Central Universities[2652019198] ; Fundamental Research Funds for the Central Universities[2652019199] ; Chinese "111" Project[B20011] ; NSFC[41888101]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000567319100010
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chinese "111" Project ; Chinese "111" Project ; Chinese "111" Project ; Chinese "111" Project ; NSFC ; NSFC ; NSFC ; NSFC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chinese "111" Project ; Chinese "111" Project ; Chinese "111" Project ; Chinese "111" Project ; NSFC ; NSFC ; NSFC ; NSFC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chinese "111" Project ; Chinese "111" Project ; Chinese "111" Project ; Chinese "111" Project ; NSFC ; NSFC ; NSFC ; NSFC ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chinese "111" Project ; Chinese "111" Project ; Chinese "111" Project ; Chinese "111" Project ; NSFC ; NSFC ; NSFC ; NSFC
源URL[http://ir.iggcas.ac.cn/handle/132A11/98228]  
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Yang, Tianshui
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing, Peoples R China
3.China Univ Geosci, Sch Earth Sci & Resources, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Bian, Weiwei,Yang, Tianshui,Jiang, Zelei,et al. Paleomagnetism of the Late Cretaceous Red Beds From the Far Western Lhasa Terrane: Inclination Discrepancy and Tectonic Implications[J]. TECTONICS,2020,39(8):22.
APA Bian, Weiwei.,Yang, Tianshui.,Jiang, Zelei.,Jin, Jingjie.,Gao, Feng.,...&Deng, Chenglong.(2020).Paleomagnetism of the Late Cretaceous Red Beds From the Far Western Lhasa Terrane: Inclination Discrepancy and Tectonic Implications.TECTONICS,39(8),22.
MLA Bian, Weiwei,et al."Paleomagnetism of the Late Cretaceous Red Beds From the Far Western Lhasa Terrane: Inclination Discrepancy and Tectonic Implications".TECTONICS 39.8(2020):22.

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来源：地质与地球物理研究所

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