Movement History of the Microcontinents from the Tibetan Plateau Based on Paleomagnetic Results with Sufficient Sampling Units

作     者：Yiming Ma Weimin Ruan Chao Niu Tianshui Yang Yiming Ma;Weimin Ruan;Chao Niu;Tianshui Yang

作者机构：School of Earth SciencesChina University of GeosciencesWuhan 430074China College of Earth SciencesGuilin University of TechnologyGuilin 541004China State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesBeijing 100083China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2022年第33卷第5期

页      面：1072-1080页

核心收录：

学科分类：070904[理学-构造地质学] 070801[理学-固体地球物理学] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.41802242 and 42174089) 

主　　题：paleolatitude evolution Fisher mean random sampling sampling sites and samples continental collision tectonics 

摘      要：Paleomagnetic results cannot be applied in global and regional tectonic reconstructions unless the paleosecular variation has been adequately ***,how many sampling sites and samples are enough to calculate a reliable paleopole remains *** on the relation among the sampling sites N,the precision parameter k,the virtual geomagnetic pole scatter s,and the confidence limit A_(95) of the paleopole,we find that 20 sites(samples)or more are required to yield a paleopole with an A_(95)≈5°based on a review of available paleomagnetic results from the Lhasa,Qiangtang and Tethyan *** samplings of Jurassic virtual geomagnetic poles from the Sangri area show that the Fisher mean pole with neglectable angle deviation can be obtained when sampling sites increase to ***-quality paleomagnetic results,with sites/samples number N/n≥~20–30,show that the Qiangtang,Lhasa,and Tethyan Himalaya moved northward in the Late Permian–Middle Triassic,Jurassic,and Cretaceous,respectively,and then accreted to Asia in the Late Triassic,Late Jurassic–Early Cretaceous and Paleocene–Early Eocene,respectively.