Active crustal deformation in southeastern Tibetan Plateau: The kinematics and dynamics

被引：48
|
作者：
Li, Yujiang [1 ,2 ]
Liu, Mian [2 ]
Li, Yuhang [3 ]
Chen, Lianwang [1 ]
机构：
[1] China Earthquake Adm, Key Lab Crustal Dynam, Inst Crustal Dynam, Beijing 100085, Peoples R China
[2] Univ Missouri, Dept Geol Sci, 101 Geol Bldg, Columbia, MO 65211 USA
[3] China Earthquake Adm, Second Monitoring & Applicat Ctr, Xian 710054, Shaanxi, Peoples R China
来源：
EARTH AND PLANETARY SCIENCE LETTERS | 2019年 / 523卷
基金：
中国国家自然科学基金;
关键词：
southeastern Tibetan Plateau; strain partitioning; gravitational spreading; tectonic extrusion; numerical modeling; RIVER SHEAR ZONE; RED-RIVER; CONTINENTAL EXTRUSION; FAULT; YUNNAN; COLLISION; STRAIN; ASIA; EARTHQUAKES; TECTONICS;
D O I：
10.1016/j.epsl.2019.07.010
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Crustal deformation in southeastern Tibetan Plateau has been attributed to tectonic extrusion and gravitational spreading. Here we analyzed the present-day strain partitioning in this region using GPS data. The results show highly localized shear strain along the Xianshuihe-Anninghe-Xiaojiang strike-slip faults, as expected by the model of tectonic extrusion. However, the localized shear strain along strike slip faults ends in southern Yunnan and transfers to crustal extension in Yunnan and contraction in Myanmar. We developed three-dimensional visco-elastoplastic finite element models to investigate the causes of the observed crustal deformation. Our results indicate that the present-day crustal deformation in southeastern Tibetan Plateau can be largely explained by gravitational spreading. (C) 2019 Elsevier B.V. All rights reserved.
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页数：11
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