摘要
位于甘肃靖远地区的水泉尖山-崛峿山南麓断裂带早第四纪前为走向逆断 层，第四纪中期出现左旋走滑迹象。研究结果表明，水泉尖山-崛峿山南麓断裂带断裂 活动的横向迁移与海原活动断裂带的形成和强烈活动有着密切的关系。
The Shuiquanjianshan-Juewushan south piedmont fault zone in Jingyuan region, Gansu Province was a strike reverse fault before early Quaternary and became sinistral strike-slip fault in middle Quaternary. As the strong activity occurred along the Haiyuan fault zone, the activities of the Shuiquanjianshan-Juewushan fault zone, other active faults before late Quaternary and com- pressive settling basin within the region were stopped.Obviously, activity of the Quaternary fault was characterized by lateral migration. It is considered that the migration mainly resulted from change of principal stress orientation of regional stress field and characteristic structure boundary condition .
出处
《西北地震学报》
CSCD
1999年第2期194-202,共9页
Northwestern Seismological Journal
