Coseismic reverse- and oblique-slip surface faulting generated by the 2008 Mw 7.9 Wenchuan earthquake, China
The Mw 7.9 Wenchuan, China, earthquake ruptured two large thrust faults along the Longmenshan thrust belt at the eastern margin of the Tibetan Plateau. This earthquake generated...
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Main Authors: | , , , , , , |
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Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2012
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Subjects: | |
Online Access: | https://hdl.handle.net/10356/95507 http://hdl.handle.net/10220/8793 |
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Institution: | Nanyang Technological University |
Language: | English |
Summary: | The Mw 7.9 Wenchuan, China, earthquake ruptured two large thrust faults along the Longmenshan
thrust belt at the eastern margin of the Tibetan Plateau. This earthquake generated
a 240-km-long surface rupture zone along the Beichuan fault and an additional 72-km-long
surface rupture zone along the Pengguan fault. Maximum vertical and horizontal offsets of
6.5 m and 4.9 m, respectively, were measured along the Bei chuan fault. A maximum vertical
offset of 3.5 m was measured along the Pengguan fault. Coseismic surface ruptures, integrated
with aftershocks and industry seismic profiles, show that two imbricate structures have
ruptured simultaneously, resulting in the largest continental thrust event ever documented.
Large oblique thrusting observed during this earthquake indicates that crustal shortening is
an important process responsible for the high topography in the region, as everywhere along
the edge of Tibetan Plateau. |
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