青藏高原西缘壳幔电性结构与断裂构造: 札达-泉水湖剖面大地电磁探测提供的依据

金胜; 叶高峰; 魏文博; 邓明; 景建恩

Volume 32 Issue 4

Jul. 2007

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Article Navigation > Earth Science > 2007 > 32(4): 474-480

JIN Sheng, YE Gao-feng, WEI Wen-bo, DENG Ming, JING Jian-en, 2007. The Electrical Structure and Fault Feature of Crust and Mantle of Western Tibet Plateau: Based on Results of Magnetotelluric Survey along Profile Zhada-Quanshuihu. Earth Science, 32(4): 474-480.

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The Electrical Structure and Fault Feature of Crust and Mantle of Western Tibet Plateau: Based on Results of Magnetotelluric Survey along Profile Zhada-Quanshuihu

JIN Sheng^{1, 2
,},
YE Gao-feng^{1, 2},
WEI Wen-bo^{1, 2},
DENG Ming^{1, 2},
JING Jian-en^{1, 2}

1.
State Key Laboratory of Geological Processes and Mineral Resources; Geo-detection Laboratory of the Ministry of Education, Beijing 100083, China
2.
School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China

Received Date: 2007-04-12
Publish Date: 2007-07-25

Abstract

Abstract

The research of magnetotelluric (MT) on the profile along Zhada-Quanshuihu on the west of the Tibetan plateau shows that the area is divided into three structural parts by Yalung Tsangpo suture and Bangong-Nujiang suture. From south to north they are Himalaya terrane, Gandese terrane and Qiangtang terrane. The area is widely distributed with high conductive layers, with fluctuating tops. The high conductive layer of Gandese terrane is deeper while that of Qiangtang terrane and Himalaya terrane is shallower. And the deepest high conductive layer is along the south of Bangong-Nujiang suture. The top surface of high conductive layer in the south Bangong-Nujiang suture is at the depth of about 20 km, which is lower than that in north of Bangong-Nujiang suture. The high conductive layer inside Gandese terrane extends northward and in the southern Qiangtang there exist double high conductive layers. In the upper crust along the profile there are groups of lateral electrical gradient zones or distortion zones of different scale and attitude, indicating the distribution of faults and sutures along the profile. According to the character of electrical structure, the structural characteristic and spatial distribution of Yalung Tsangpo suture, Bangong-Nujiang suture and the major faults of Longmucuo and Ger-Zangbo were inferred.
- west of the Tibetan plateau,
- magnetotelluric (MT),
- high conductive layers of crust,
- electrical structure,
- structural characteristic of fault

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References(28)

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