کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4693377 | 1636863 | 2010 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Crustal structures in the area of the 2008 Sichuan earthquake from seismologic and gravimetric data Crustal structures in the area of the 2008 Sichuan earthquake from seismologic and gravimetric data](/preview/png/4693377.png)
The 12 May 2008 the Sichuan earthquake was one of the worst natural disasters in China. Here, we present a detailed picture of the epicentral area inferred geophysical data. Based on the analysis of teleseismic data acquired by a dense seismic network, we highlight an abrupt 20 km Moho offset between the Sichuan Basin and the Tibetan plateau and a horizontal discontinuity at ∼ 15 km depth, which may connect with the ruptured zone of the 2008 event. We obtain low mean crustal velocity ratios, which suggest the absence of a thick and extensive zone of partial melt within the crust beneath the eastern part of the Songpan–Garze Terrane. All our data support the idea that the Longmen Shan range mark a zone of active strain localization due to the rigid Yangtze craton resisting eastward displacement of the Tibetan Plateau.
Journal: Tectonophysics - Volume 491, Issues 1–4, 20 August 2010, Pages 205–210