Electrical Structure and Fault Features of Crust and Upper Mantle beneath the Western Margin of the Qinghai-Tibet Plateau: Evidence from the Magnetotelluric Survey along Zhada-Quanshui Lake Profile

2007 ◽  
Vol 18 (4) ◽  
pp. 326-333 ◽  
Author(s):  
J SHENG ◽  
Y GAOFENG ◽  
W WENBO ◽  
D MING ◽  
J JIANEN
Episodes ◽  
2005 ◽  
Vol 28 (4) ◽  
pp. 263-273 ◽  
Author(s):  
Rui Gao ◽  
Zhanwu Lu ◽  
Qiusheng Li ◽  
Ye Guan ◽  
Jisheng Zhang ◽  
...  

Author(s):  
Honglei Li ◽  
Jian Fang

As the most active plateau on the Earth, the Qinghai-Tibet Plateau has a complex crust-mantle structure. Knowledge of the distribution of such a structure provides information for understanding the underlying geodynamic processes. We obtains a three-dimensional density model of crustal and upper mantle beneath Qinghai-Tibet plateau and its surrounding areas from the residual geoid anomalies using the Earth Gravitational Model (EGM) 2008. We estimate a refined density model by iterations, using an initial density contrast model. We confirm that the EGM2008 mission products can be used to constrain the crust-mantle density structures. Our major findings are: (1). At 300-400 km depth, high-D anomalies terminate around Jinsha River Suture (JRS) in the central TP, suggesting that the Indian plate has been reached over the Bangong Nujiang Suture (BNS) and almost reach to the JRS. (2). On the eastern TP, low-D anomalies at the depth of 0-300 km together with high-D anomalies at 400-670 km further verified the current eastward subduction of Indian plate. The ongoing subduction provides forces to the occurrences of frequent earthquakes and volcano. (3). At 600 km depth, low-D anomalies inside the TP illustrate the existence of hot weak material beneath there, contributing to the external material inward-thrusting.


2013 ◽  
Vol 134 ◽  
pp. 137-149 ◽  
Author(s):  
Yajun Li ◽  
Guangshu Zhang ◽  
Jun Wen ◽  
Daohong Wang ◽  
Yanhui Wang ◽  
...  

2005 ◽  
Vol 48 (3) ◽  
pp. 761-770 ◽  
Author(s):  
Xiao-Bing MA ◽  
Xiang-Ru KONG ◽  
Hong-Bing LIU ◽  
Yong-Li YAN

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