Crustal structure of the central Tibetan plateau and geological interpretation
Can Ge1, 2, 3, Youshun Sun3, M Nafi Toksoz3, Yingcai Zheng3, Yong Zheng1, Xiong Xiong1, Diming Yu3
1 State Key Laboratory of Geodesy and Earth Geodynamics, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China 2 University of Chinese Academy of Sciences, Beijing 100049, China 3 Department of Earth, Atmosphere and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Crustal structure of the central Tibetan plateau and geological interpretation
Can Ge1, 2, 3, Youshun Sun3, M Nafi Toksoz3, Yingcai Zheng3, Yong Zheng1, Xiong Xiong1, Diming Yu3
1 State Key Laboratory of Geodesy and Earth Geodynamics, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China 2 University of Chinese Academy of Sciences, Beijing 100049, China 3 Department of Earth, Atmosphere and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
摘要Based on teleseismic data obtained from 225 stations from two networks in the central Tibetan plateau, we have generated detailed crustal structure images using P-wave receiver function techniques with more accurate piercing-depth-correction and time-depth-correction than what have previously been available. Our images indicate an undulatory Moho beneath the Tibetan plateau with a steep jump beneath the northern Himalaya, and obviously different structures in proximity to the Bangong-Nujiang suture. In several sections of the Tibetan plateau, the lower crust is characterized by pervasive high-velocity regions, which are consistent with the preservation of eclogite bodies beneath the plateau, whose presence affects the dynamics of the Tibetan plateau.
Abstract：Based on teleseismic data obtained from 225 stations from two networks in the central Tibetan plateau, we have generated detailed crustal structure images using P-wave receiver function techniques with more accurate piercing-depth-correction and time-depth-correction than what have previously been available. Our images indicate an undulatory Moho beneath the Tibetan plateau with a steep jump beneath the northern Himalaya, and obviously different structures in proximity to the Bangong-Nujiang suture. In several sections of the Tibetan plateau, the lower crust is characterized by pervasive high-velocity regions, which are consistent with the preservation of eclogite bodies beneath the plateau, whose presence affects the dynamics of the Tibetan plateau.
基金资助:the project from China Earthquake Administration under grant 201308013 and the National Natural Science Foundation of China (Nos. 40974034, 41174086, 41074052, 41021003)
通讯作者:
Can Ge
E-mail: gecan2008@gmail.com
引用本文:
Can Ge, Youshun Sun, M Nafi Toksoz, Yingcai Zheng, Yong Zheng, Xiong Xiong, Diming Yu. Crustal structure of the central Tibetan plateau and geological interpretation[J]. 《地震学报》英文版, 2012, 25(5-6): 363-370.
Can Ge, Youshun Sun, M Nafi Toksoz, Yingcai Zheng, Yong Zheng, Xiong Xiong, Diming Yu. Crustal structure of the central Tibetan plateau and geological interpretation. Earthquake Science, 2012, 25(5-6): 363-370.
