青藏高原申扎-双湖剖面岩石圈电性结构特征及其含义

金胜; 盛跃; 梁宏达; 魏文博; 叶高峰; 卢占武

doi:10.3799/dqkx.2019.015

Volume 44 Issue 6

Jun. 2019

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Jin Sheng, Sheng Yue, Liang Hongda, Wei Wenbo, Ye Gaofeng, Lu Zhanwu, 2019. Lithospheric Electrical Structure along Shenzha-Shuanghu Profile in Tibetan Plateau and Its Significance. Earth Science, 44(6): 1773-1783. doi: 10.3799/dqkx.2019.015

Citation:

Jin Sheng, Sheng Yue, Liang Hongda, Wei Wenbo, Ye Gaofeng, Lu Zhanwu, 2019. Lithospheric Electrical Structure along Shenzha-Shuanghu Profile in Tibetan Plateau and Its Significance. Earth Science, 44(6): 1773-1783. doi: 10.3799/dqkx.2019.015

Citation:

Jin Sheng, Sheng Yue, Liang Hongda, Wei Wenbo, Ye Gaofeng, Lu Zhanwu, 2019. Lithospheric Electrical Structure along Shenzha-Shuanghu Profile in Tibetan Plateau and Its Significance. Earth Science, 44(6): 1773-1783. doi: 10.3799/dqkx.2019.015

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Lithospheric Electrical Structure along Shenzha-Shuanghu Profile in Tibetan Plateau and Its Significance

doi: 10.3799/dqkx.2019.015

Jin Sheng^{1,2
,
,},
Sheng Yue¹,
Liang Hongda³,
Wei Wenbo^1,2,
Ye Gaofeng^1,2,
Lu Zhanwu⁴

1.
School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China
2.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
3.
School of Earth Geosciences and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
4.
Key Laboratory of Earth Probe and Geodynamics, Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China

Received Date: 2018-08-17
Publish Date: 2019-06-15

Abstract

Abstract

To understand the crust-mantle electrical structure and the tectonic feature of Bangong-Nujiang suture, and offer the electrical constraints to its subduction polarity, the magnetotellurics data of the Shenzha-Shuanghu magnetotelluric profile in the central Himalaya-Tibetan Plateau was carefully processed and analyzed, obtaining a reliable 2-D electrical model. The study represents that there are some different scale resistors distributed along the profile in the upper crust and the bottom depth varying from 10 to 25 km, and meanwhile there is a middle-lower conductive layer composed of some discontinuous conductivities beneath the resistive layer. With the analysis of the electric structure, the study indicates that the subduction polarity of the Bangong-Nujiang Tethyan ocean may be double-sided, and subsequently the detachment of the upper crustal resistor was occurred, and so the twice dynamics above may contribute to the formation of the conductor within the suture. Furthermore, the conductor beneath the northern Lhasa terrane may also reflect the relation among the dynamics, magmatism and mineralization.
- Bangong-Nujiang suture,
- magnetotellurics,
- electrical structure,
- double-sided subduction,
- deposit,
- uppercrustal resistor,
- mineralization,
- geophysics

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References(47)

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Lithospheric Electrical Structure along Shenzha-Shuanghu Profile in Tibetan Plateau and Its Significance

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