Meso- and Microstructural Analysis of Coseismic Shear Zone of the 1999 MW 7.6 Chi-Chi Earthquake, Taiwan
Meso- and Microstructural Analysis of Coseismic Shear Zone of the 1999 MW 7.6 Chi-Chi Earthquake, Taiwan
复制标题
1999年台湾集集7.6级地震同震剪切带的细观和微观结构分析
DOI：
10.1785/0120040015
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发表时间：
2005
影响因子：
3
通讯作者：
Allen T. Chen
中科院分区：
文献类型：
--
作者：
A. Lin;C. Lee;T. Maruyama;Allen T. Chen
1999年台湾集集Mw7.6地震的地表破裂主要受先存车笼埔断层带控制，该断层带分布在宽达60 m的区域内，而主要的同震滑动仅局限于<0.3 cm的狭窄剪切带内。车笼铺断裂带由碎裂岩、断层角砾岩和断层泥带组成，在整个断裂带的断层露头和钻孔岩芯中都有很好的观察。碎裂岩和断层角砾岩带中发育的面理与断层泥带中的面理平行，断层泥带是主要的同震滑动发生地。剪切带和断层岩的构造分析表明，车笼埔断裂带自更新世形成以来，以逆冲断层滑动为主，具有明显的左旋滑动分量。这种斜向逆冲运动是由菲律宾海板块与欧亚板块之间的东南-西北斜向汇聚作用引起的。
The surface rupture of the 1999 M w 7.6 Chi-Chi (Taiwan) earthquake was controlled primarily by the pre-existing Chelungpu fault zone, which is distributed in a wide zone of up to 60 m, although the main coseismic slip is localized in a narrow shear zone of <0.3 cm. The Chelungpu fault zone is composed of cataclasite, fault breccia, and gouge zones that are well observed in both the fault outcrops and the drill cores taken throughout the fault zone. The foliations developed in the cataclasite and fault breccia zones are oriented parallel to that of the fault gouge zone where the main coseismic slip occurred. The structural analyses of the shear zone and fault rocks show that the Chelungpu fault zone has slipped as a thrust fault with a significant left-lateral slip component since its formation in the Pleistocene. This oblique thrust motion is caused by the southeast–northwest oblique convergence between the Philippine Sea plate and the Eurasian plate.
影响因子：
56.9
作者：
Lin, AM;Fu, BH;Zhao, Y
通讯作者：
Zhao, Y