三峡地区中上地壳密度结构

张毅; 陈超; 梁青; 王林松; 杜劲松; 刘圣博

doi:10.3799/dqkx.2012.S1.022

Volume 37 Issue S1

Nov. 2021

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Article Navigation > Earth Science > 2012 > 37(S1): 213-222

ZHANG Yi, CHEN Chao, LIANG Qing, WANG Lin-song, DU Jin-song, LIU Sheng-bo, 2012. Density Structure of Upper and Middle Crust in Three Gorges Reservoir Area. Earth Science, 37(S1): 213-222. doi: 10.3799/dqkx.2012.S1.022

Citation:

ZHANG Yi, CHEN Chao, LIANG Qing, WANG Lin-song, DU Jin-song, LIU Sheng-bo, 2012. Density Structure of Upper and Middle Crust in Three Gorges Reservoir Area. Earth Science, 37(S1): 213-222. doi: 10.3799/dqkx.2012.S1.022

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Density Structure of Upper and Middle Crust in Three Gorges Reservoir Area

doi: 10.3799/dqkx.2012.S1.022

Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China

Received Date: 2012-01-02
Available Online: 2021-11-15
Publish Date: 2012-05-01

Abstract

Abstract

The Three Gorges located in northern margin of Yangtze plate, is surrounded by four different geotectonic units: Qinling orogenic belt in north, Sichuan basin in west, North China plate in northeast and South China fold belt in southeast. In history, there are so many kinds of tectonic movements occurred. Utilizing Bouguer gravity anomaly in the Three Gorges area, and based on the technology of 3D gravity inversion, the 3D density structure of the upper and middle crust of Three Gorges reservoir area is obtained. The results show that Huangling anticline is a high density area, with a maximum depth of about 15 km. The distribution of regional faults around the Huangling anticline is lozenge-shaped, and those faults cut to the top of the middle crust with a depth of about 10-15 km, controlling the tectonic evolution and earthquake distributions in this area. Along Yangtze River, there is a low density stratum in the middle of Huangling anticline, which presumably is the result of the low density materials intruded along Wuduhe fault. Furthermore, Zigui basin in west has low density values, and its deposit stratum is nonuniform in thickness, that is, becoming thicker and thicker from Badong to Zigui.
- Three Gorges,
- Huangling anticline,
- Zigui basin,
- 3D density structure,
- fault,
- sedimentology,
- geophysics

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References(66)

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Density Structure of Upper and Middle Crust in Three Gorges Reservoir Area

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