地震地质 ›› 2000, Vol. 22 ›› Issue (2): 139-146.

• 构造地质 • 上一篇    下一篇

海原、六盘山断裂带至银川断陷第四纪构造应力场分析

谢富仁, 舒塞兵, 窦素芹, 张世民, 崔效锋   

  1. 中国地震局地壳应力研究所, 北京 100085
  • 收稿日期:1999-03-31 修回日期:1999-08-31 出版日期:2000-06-14 发布日期:2009-11-25
  • 基金资助:
    地震科学联合基金资助(9507424;94013);中国地震局地壳应力研究所论著1999A0006

QUATERNARY TECTONIC STRESS FIELD IN THE REGION OF HAIYUAN-LIUPANSHAN FAULT ZONE TO YINCHUAN FAULT-DEPRESSION

<a href="http://www.dzdz.ac.cn/EN/article/advancedSearchResult.do?searchSQL=(((Xie Furen[Author]) AND 1[Journal]) AND year[Order])" target="_blank">Xie Furen</a>, <a href="http://www.dzdz.ac.cn/EN/article/advancedSearchResult.do?searchSQL=(((Shu Saibin[Author]) AND 1[Journal]) AND year[Order])" target="_blank">Shu Saibin</a>, <a href="http://www.dzdz.ac.cn/EN/article/advancedSearchResult.do?searchSQL=(((Dou Suqin[Author]) AND 1[Journal]) AND year[Order])" target="_blank">Dou Suqin</a>, <a href="http://www.dzdz.ac.cn/EN/article/advancedSearchResult.do?searchSQL=(((Zhang Shiming[Author]) AND 1[Journal]) AND year[Order])" target="_blank">Zhang Shiming</a>   

  1. Institute of Crustal Dynamic, CSB, Beijing 100085
  • Received:1999-03-31 Revised:1999-08-31 Online:2000-06-14 Published:2009-11-25

摘要: 利用断层滑动资料反演构造应力张量从而确定出海原、六盘山断裂带至银川断陷的第四纪两期构造应力场:早更新世末期以前,为北东-南西挤压型构造应力场,由此造成该地区断裂活动主要以逆断为主;早更新世末期至中更新世以后,构造应力场发生了调整,主压应力方向由早期的北东-南西改变为北东东-南西西,应力结构由挤压型转变为走滑型,并导致断裂活动由早期的逆断为主变为走滑为主,这种应力场格局一直持续至今。研究区现代构造应力场可划分为:海原断裂带走滑应力区、六盘山逆断-走滑混合应力区和银川断陷拉张应力区。

关键词: 海原断裂带, 银川断陷, 构造应力场, 第四纪

Abstract: By inversion of fault slip data, it is suggested that stress field of the region from the Haiyuan Liupanshan fault zone to the Yingchuan fault-depression has two major stages. Before early Pleistocene the maximum principal compression stress direction was NE-SW, the stress regime was reverse type, witch resulted in dominating reverse faults. After early to middle Pleistocene the tectonic stress field had a readjustment, the maximum principal compression stress direction was changed from NE-SW to NEE-SWW, the stress regime from reverse type to strike-slip type too, and the former reverse faults became strike-slip faulting, which continues much the same today. The recent tectonic stress field of the studied area can be divided into strike-slip region of Haiyuan fault zone, mixed region of reverse and strike-slip of Liupanshan and extension region of Yinchuan fault-depression.

Key words: Haiyuan fault zone, Tectonic stress field, Quaternary