中国西部大陆岩石圈的有效弹性厚度研究

赵俐红; 姜效典; 金煜; 金翔龙

Volume 29 Issue 2

Mar. 2004

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Article Navigation > Earth Science > 2004 > 29(2): 183-190

ZHAO Li-hong, JIANG Xiao-dian, JIN Yu, JIN Xiang-long, 2004. Effective Elastic Thickness of Continental Lithosphere in Western China. Earth Science, 29(2): 183-190.

Citation:

ZHAO Li-hong, JIANG Xiao-dian, JIN Yu, JIN Xiang-long, 2004. Effective Elastic Thickness of Continental Lithosphere in Western China. Earth Science, 29(2): 183-190.

ZHAO Li-hong, JIANG Xiao-dian, JIN Yu, JIN Xiang-long, 2004. Effective Elastic Thickness of Continental Lithosphere in Western China. Earth Science, 29(2): 183-190.

Citation:

ZHAO Li-hong, JIANG Xiao-dian, JIN Yu, JIN Xiang-long, 2004. Effective Elastic Thickness of Continental Lithosphere in Western China. Earth Science, 29(2): 183-190.

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Effective Elastic Thickness of Continental Lithosphere in Western China

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266003, China
2.
Graduate School, Chinese Academy of Sciences, Beijing 100039, China
3.
Laboratory of Submarine Geoscience, the Second Institute of Oceanography of State Oceanic Administration, HangzhOU 310012, China
4.
Marine Geology College, Ocean University of China, Qngdao 266003, China
5.
ChevronTexaco Park, 6001 Bollinger Canyon Road, San Ramon, CA 94583, USA

Received Date: 2003-07-12
Publish Date: 2004-03-25

Abstract

Abstract

Western China has the most spectacular tectonic features on the continental Earth. It possesses the world highest plateau (Tibet), the world largest intra-continental strike-slip fault (Altyn Tagh) and the world highest intra-continental mountain belt (Tienshan Mountains). As the convergence belt between India plate and Europe plate, this region is a good place for the study of lithosphere dynamics. In this paper, the authors use gravity data and topography data to demonstrate the correlation of these conspicuous upper crustal structures with the deformation of the upper mantle lithosphere in China. we compute the effective elastic thickness of the elastic plate using three-dimensional finite difference in space domain according to the rheology of the continental lithosphere. This model considers the variation of the mechanical strength in vertical and horizontal orientation. The modeling results show that the effective elastic thickness of the lithosphere in China varies significantly from elastic thickness of 6-10 km in highly deformed mountain belts to over 60 km in stable platform areas. The effective elastic thickness of Tibet, Tarim, southern Tienshan and northern Tienshan are separately 30, 40-50, 10-15 and 30 km. While the effective elastic thickness in the western portion of the Altyn Tagh fault (west of 90°E) is less than that in the eastern portion.
- lithosphere,
- elastic plate,
- effective elastic thickness,
- rheology,
- western China

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References(45)

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