Detailed Mapping of Surface Rupture of the Wenchuan Ms8.0 Earthquake near Hongkou and Seismotectonic Implications
详细信息
- 责任者：Liu Jing (Institute of Tibetan Plateau Research ; Chinese Academy of Sciences ; Beijing 100085 ; China) ; Sun Jie
- 刊名：Quaternary Sciences
- 出版年：2010
- 卷期：30(1)
- 关键词：汶川地震2008 ; Wenchuan earthquake 2008 ; 破裂 ; rupture ; 龙门山断裂带 ; Longmenshan Fault Zone
- 页码：p.1-29
- 图表：illus., 1 table,45 refs.
- 分类号：0500
- issnNo：ISSN1001-7410
- isbnNo：CN11-2708/P
摘要
In this paper，the authors document effort in fine-scale mapping of the 5.12 Wenchuan earthquake surface rupture on the Yingxiu-Beichuan fault near Hongkou. Surface rupture in this short stretch shows clearly large along-strike variations in both map view geometry and coseismic slips. Based on the discontinuities in slip and geometry，the rupture can be divided into four sections，from southwest to northeast. The authors also discuss the cutting relationship of slickenside striations of two different plunges and their geological and seismological implications，by pointing out that the curved striations may indicate the low initial shear stress at some localities on the Yingxiu-Beichuan fault before the Wenchuan earthquake.