气候变化领域集成服务门户(CCPortal): Lithospheric electrical structure across the Bangong-Nujiang Suture in northern tibet revealed by magnetotelluric

CCPortal

DOI	10.3389/feart.2022.1085583
	Lithospheric electrical structure across the Bangong-Nujiang Suture in northern tibet revealed by magnetotelluric
	Yang, Zhen; Liang, Hongda; Gao, Rui; Han, Jiangtao; Xin, Zhonghua; Kang, Jianqiang; Shi, Zhuoxuan; Zhang, Lu; Qi, Rui; Li, Huilin
发表日期	2023
EISSN	2296-6463
卷号	10
英文摘要	Competing hypotheses have been proposed to explain the subduction polarity of the Bangong-Nujiang Tethyan Ocean and the formation of the high-conductivity anomaly beneath the Qiangtang terrane. However, the lithospheric architecture of the northern Tibetan Plateau is still poorly understood due to inhospitable environments and topography. Therefore, in the winter of 2021, a 440 km long, SN-trending broadband magnetotelluric (MT) profile was recorded in northern Tibet to detect its regional lithospheric structure. The nonlinear conjugate gradients algorithm is conducted to invert the individual TM mode data. A reliable 2D electrical model was obtained by ablation processing and analysis of broadband magnetotelluric data to test the lithospheric electrical structure and dynamics between the northern Lhasa and Qiangtang terranes. The inversion results reveal the lithospheric structure at a depth of 100 km in northern Tibet, which synthesizes geological, geochemical and deep seismic reflection evidence and firmly identifies that the trace of the south-dipping conductor mainly resulted from the southward subduction of the Bangong-Nujiang Tethyan Ocean under the Lhasa terrane and the trace of the north-dipping conductor likely due to the northward subduction of the Bangong-Nujiang Tethyan Ocean under the Qiangtang terrane. In addition, the magnetotelluric profile also images a high-conductivity lithospheric-scale anticline beneath the central Qiangtang terrane, which may correspond to the upwelling of postcollisional magmatism triggered by northward subduction of the Bangong-Nujiang Tethyan Ocean under the Qiangtang terrane, aqueous fluid and/or partial melting.
关键词	northern lhasa terrane qiangtang terrane bangong-nujiang suture magnetotellurics high-conductivity anomaly
英文关键词	CRUSTAL STRUCTURE; SOUTHERN TIBET; VOLCANIC-ROCKS; LHASA TERRANE; SUBDUCTION; CONSTRAINTS; QIANGTANG; BENEATH; EVOLUTION; MANTLE
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:000926485400001
来源期刊	FRONTIERS IN EARTH SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282922
作者单位	Sun Yat Sen University; China Geological Survey; Chinese Academy of Geological Sciences; Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences; Southern Marine Science & Engineering Guangdong Laboratory; Southern Marine Science & Engineering Guangdong Laboratory (Zhuhai); China Geological Survey; Institute of Geology, Chinese Academy of Geological Sciences; Ministry of Natural Resources of the People's Republic of China; Chinese Academy of Geological Sciences; Jilin University; Tsinghua University
推荐引用方式 GB/T 7714	Yang, Zhen,Liang, Hongda,Gao, Rui,et al. Lithospheric electrical structure across the Bangong-Nujiang Suture in northern tibet revealed by magnetotelluric[J],2023,10.
APA	Yang, Zhen.,Liang, Hongda.,Gao, Rui.,Han, Jiangtao.,Xin, Zhonghua.,...&Li, Huilin.(2023).Lithospheric electrical structure across the Bangong-Nujiang Suture in northern tibet revealed by magnetotelluric.FRONTIERS IN EARTH SCIENCE,10.
MLA	Yang, Zhen,et al."Lithospheric electrical structure across the Bangong-Nujiang Suture in northern tibet revealed by magnetotelluric".FRONTIERS IN EARTH SCIENCE 10(2023).