Abstract: By use of fault slip data in invesion of using different-stage tectonic stress tensors,we have obtained two stages of tectonic Quaternary stress field of the Xianshuihe fault zone. In the first stage(from early-mid Pleistocene),the tectonic stress field is characteristic of NE-SW compression. In the second phase(from late-Pleistocene to the present),the tectonic stress field is mainly characteristic of nearly E-W compression and nearly S-N extension. In this stress field,the Xi-anshuihe fault mainly shows a left-lateral slip.

Key words: Xianshuihe fault, Tectonic stress field, Fault slip, Quaternary

摘要： 利用断层滑动方向资料反演构造应力张量的分期计算方法,获得鲜水河断裂带区域第四纪以来两期主要构造应力作用:第1期为早～中更新世,构造应力作用以北东-南西向挤压为特征;第Ⅱ期自晚更新世至今,构造应力作用以近东西向挤压和近南北向拉张为特征。

关键词: 鲜水河断裂, 构造应力场, 断层滑动, 第四纪