Abstract: We have analysized the data of seismicity,geology and crustal deformation geodesy along the Xiaojiang fault zone. It is found that this strike-slip fault is characterized by alternative deformation of compressive uplift and extensional subsidence. Considering its correlation to distribution of historical earthquakes,it is suggested that this feature of fault deformation may be associated with the process of the strain accumulation of the Xiaojiang fault zone. This is of great importance for the analyses of seismic risk in this area and determination of potential source area of future major earthquakes.

Key words: Fracture zone, Crustal deformation, Seismic risk region

摘要： 通过小江断裂带现今地震地质及地壳形变测量资料的综合分析,讨论了走滑断裂带挤压隆起和拉张下沉相间出现的变形特征。分析其与历史地震分布的相关关系后认为,挤压隆起和拉张下沉这一变形特征综合反映了小江断裂带现今活动过程中应变积累调整的变化过程,它对区内地震危险性分析及未来强震潜在震源区的确定都有十分重要的现实意义。

关键词: 断裂带, 地壳形变, 地震危险区