Segmentation of the Longmenshan Fold and Thrust Belt and Its Relationship with the Wenchuan Ms 8.0 Earthquake
- 责任者：Wang Maomao (Department of Earth Sciences ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing210093 ; China) ; Jia Dong
- 刊名：Quaternary Sciences
- 出版年：2010
- 卷期：30(4)
- 关键词：褶皱冲断带 ; fold and thrust belts ; 汶川地震2008 ; Wenchuan earthquake 2008 ; 龙门山断裂带 ; Longmenshan Fault Zone
- 页码：p.711-720
- 图表：6 illus., 46 refs.
- 分类号：0300
- issnNo：ISSN1001-7410
- isbnNo：CN11-2708/P
This paper focused on the segmentation of the Longmenshan belt and its significance to the Wenchuan earthquake. The Longmenshan belt can be divided into two different structural segments: the north segment and the south segment. Field investigations reveal that the Wenchuan earthquake produced two visible surface rupture zones: one along the Beichuan-Yingxiu thrust fault and another along the Pengguan thrust fault. These coseismic surface ruptures can also be divided into two segments: the south segment and the north segment. The slip on ruptures of the south segment is characterized mainly by thrusting with a little amount of dextral oblique-slip, whereas the slip on ruptures of the north segment is characterized mainly by dextral strike-slip accompanied by a thrusting component.