地震地质 ›› 1993, Vol. 15 ›› Issue (2): 123-130.

• 科研简报 • 上一篇    下一篇

基岩区断层活动特征和时间的研究——以康定-磨西断裂段为例

刘行松, 胥怀济, 史兰斌, 唐汉军, 计凤桔, 林传勇, 郭金弟, 何永年   

  1. 国家地震局地质研究所, 北京 100029
  • 收稿日期:1990-11-30 修回日期:1992-12-31 出版日期:1993-06-02 发布日期:2009-11-25
  • 基金资助:
    地震科学联合基金资助(88201)

STUDY ON ACTIVITY FEATURE AND TIME OF THE FAULTS IN BEDROCK REGION-TAKING KANGDING-MOXI FAULT SEGMENT AS AN EXAMPLE

Liu Xingsong, Xu Huaiji, Shi Lanbin, Tang Hanjun, Ji Fengju, Lin Chuanyong, Guo Jindi, He Yongnian   

  1. Institute of Geology, SSB, Beijing 100029
  • Received:1990-11-30 Revised:1992-12-31 Online:1993-06-02 Published:2009-11-25

摘要: 为了探讨基岩裸露区断层的活动特征、期次和时间,在鲜水河断裂带东南段的康定-磨西断裂段采集了一系列断层岩和断层泥样品,运用TL、ESR、K-Ar、石英形貌分析和变形显微构造分析法进行了综合测试。结果表明,断裂段经历了多种机制(韧性剪切和脆性断裂)、多期次、多种运动方式(左旋和右旋)的活动,最新一次较强烈活动的下限时间是晚更新世末或全新世初。

关键词: 康定-磨西断裂, 断层活动, 断层物质, 同位素测年, 石英形貌, 显微构造

Abstract: To study the activity feature, phase and time of the faults in a bedrock exposing region, a series of samples of fault rocks and fault gouges are collected along the Kangding-Moxi fault segment. TL. ESR. K-Ar techniques,analyses of quartz surface texture and deformation microstructure are used for the comprehensive research. The results show that the fault segment has undergone multiperiodic activity with multiple types (ductile shearing-brittle fracture) and multiple patterns (left-lateral-right-lateral),and the lower limit of the lost strong activity was around the end of late pleistocene or the begining of Holocene (ca. 10000 years).

Key words: Kangding Moxi fault, Fault activity, Fault material, Isotopic dating, Surfase texture of quartz, Microstructural analysis