地震地质 ›› 1995, Vol. 17 ›› Issue (3): 204-206.

• 科研简讯 • 上一篇    下一篇

断层泥的再生显微结构特征及其地震地质意义

张秉良, 李建国, 方仲景, 向宏发, 虢顺民, 张晚霞   

  1. 国家地震局地质研究所, 北京 100029
  • 收稿日期:1994-08-31 修回日期:1995-04-30 出版日期:1995-09-06 发布日期:2009-11-25
  • 基金资助:

    地震科学联合基金(92190,92218);中国地质科学院地质力学研究所开放实验室资助(93005)

REGENERATED MICROSTRUCTURAL FEATURES OF FAULT GOUGES AND THEIR SEISMOGEOLOGICAL IMPLICATIONS

Zhang Bingliang, Li Jiangguo, Xiang Hongfa, Fang Zhongjing, Guo Shunmin, Zhang Wanxia   

  1. Instute of Geology, SSB, Beijing 100029
  • Received:1994-08-31 Revised:1995-04-30 Online:1995-09-06 Published:2009-11-25

摘要:

三轴剪切摩擦实验后的断层泥与天然断层泥的再生显微结构特征研究表明,断层泥的显微结构特征与断层滑动方式之间有一定的关系,稳滑使断层泥变形均匀,产生低角度剪切(<14°)、布丁构造和颗粒碎裂流动。粘滑使断层泥局部发生强烈变形、高角度剪切(>14°)和碎粒出现随机裂纹等。断层泥的再生显微结构特征可用作鉴别古地震的存在。

关键词: 断层泥, 显微构造, 断层性状

Abstract:

The study of regenerated microstructures of fault gouge formed under triaxial friction experiment and natural gouges indicates a certain relationship between microstructure features and fault slip mode.The samples subject to stable slip exhibits the fault gouge to be uniformly deformed,resulting in low Riedel shear angles(<14?)and cataclastic flow structure. When the samples were subject to stick slip,the fault gouge was locally stronglydeformed,and random cracks were formed at a high Riedel shear angle(>14?).The regenerated microstruc-tures in natural fault gouge zones may also surves as a potential tool for identifing paleoearthquakes.

Key words: Fault gouge, Microstructure, Fault behavior