Crustal structure and magma plumbing system beneath the Puer Basin, southwest China: Insights from three-dimensional magnetotelluric imaging

doi:10.1016/j.tecto.2019.04.032

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 > 中国科学院页岩气与地质工程重点实验室

	Crustal structure and magma plumbing system beneath the Puer Basin, southwest China: Insights from three-dimensional magnetotelluric imaging
	Cheng, Yuanzhi 1,2,3; Tang, Ji 1; Chen, Xiaobin 1; Dong, Zeyi 1; Wang, Libo 4
刊名	TECTONOPHYSICS
	2019-07-20
卷号	763 页码:30-45
关键词	Puer Basin Magnetotellurics 3-D inversion Partial melt Seismotectonics
ISSN号	0040-1951
DOI	10.1016/j.tecto.2019.04.032
英文摘要	The Puer Basin region, where Yangtze continental block and the Tethyan orogen collide, provides a favorable area for studying the processes of magmatic evolution, intracontinental earthquakes and hydrothermal systems. Focused on these issues, we have acquired a three-dimensional electrical model of the Puer Basin in southern Yunnan, using broadband magnetotelluric data extending from 320 to 0.001 Hz along eight profiles covering the Puer Basin. The complex subsurface model is filled with zones of fluid-filled fracture, partial melt networks, regional faults, and cold plutons. There are two highly conductive zones (3-10 Omega m) beneath the Puer Basin from 10 km to 35 km in depth. The estimated melt fractions are in the range of 4-26 vol%, which is required to account for the observed high conductivities in the crust based on the formulation of the multiple conduction models and resistivity from the three-dimensional magnetotelluric inversion. The partial melt in the middle and lower crust may have been derived from either magma intrusion of the mantle sources or the dehydration processes in the slab subducting of Yangtze continental block beneath the Tethyan orogen in southern Yunnan. Based on the three-dimensional electrical model, integrating with crustal anisotropy, thermal structure, potential field and seismic survey results, we have a more comprehensive understanding of the mechanism of the hydrothermal system, seismotectonics, and deep seismogenic background.
资助项目	National Natural Science Foundation of China[41674081] ; General Financial Grant from the Chinese Postdoctoral Science Foundation[2016M601122]
WOS关键词	ELECTRICAL-RESISTIVITY STRUCTURE ; RAYLEIGH-WAVE DISPERSION ; LOWER CONTINENTAL-CRUST ; TAUPO VOLCANIC ZONE ; TIBETAN PLATEAU ; PARTIAL MELT ; LITHOSPHERE BENEATH ; GEOTHERMAL-FIELD ; UPPERMOST MANTLE ; JOINT INVERSION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000472243000003
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; General Financial Grant from the Chinese Postdoctoral Science Foundation ; General Financial Grant from the Chinese Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; General Financial Grant from the Chinese Postdoctoral Science Foundation ; General Financial Grant from the Chinese Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; General Financial Grant from the Chinese Postdoctoral Science Foundation ; General Financial Grant from the Chinese Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; General Financial Grant from the Chinese Postdoctoral Science Foundation ; General Financial Grant from the Chinese Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/92536]
专题	地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者	Tang, Ji
作者单位	1.China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing 10029, Peoples R China 4.Jiangxi Earthquake Adm, Nanchang 330039, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Yuanzhi,Tang, Ji,Chen, Xiaobin,et al. Crustal structure and magma plumbing system beneath the Puer Basin, southwest China: Insights from three-dimensional magnetotelluric imaging[J]. TECTONOPHYSICS,2019,763:30-45.
APA	Cheng, Yuanzhi,Tang, Ji,Chen, Xiaobin,Dong, Zeyi,&Wang, Libo.(2019).Crustal structure and magma plumbing system beneath the Puer Basin, southwest China: Insights from three-dimensional magnetotelluric imaging.TECTONOPHYSICS,763,30-45.
MLA	Cheng, Yuanzhi,et al."Crustal structure and magma plumbing system beneath the Puer Basin, southwest China: Insights from three-dimensional magnetotelluric imaging".TECTONOPHYSICS 763(2019):30-45.