摘要
根据基岩断块山地、波状黄土塬 (洪积台地 )、平缓黄土塬 (洪积扇裙 )、阶地等较多实际资料 ,研究渭河盆地带地貌结构与活动断裂及新构造运动间的关系。研究认为 ,层状地貌的发育与形成 ,主要受以盆地带南缘断裂带为主的相关阶状正断层正倾滑活动的控制 ,盆地带南缘断裂带除产生强烈的垂直差异运动外 ,还由盆边向盆内扩展 ,并导致盆地带另一侧向北扩张。此活动格局控制和影响了盆地带地貌的形成与演化。
Based on practical data about rock block mountain,rolling loess land(pluvial tableland),flat loess land(pluvial fan skirt)and terrace,the relation between geomorphological structure in the Weihe basin zone and active faults and neotectonic movement is studied.The study thinks that development and formation of layered land form are controlled by normal dip slip activity of step normal faults taking the fault zone south of the basin zone as dominant;the fault zone south of the basin zone expands from the edge to the inside of the basin besides strong vertical differential movement,causing the other side of the basin zone to expand to north.The formation and evolution of landform in the basin zone are controlled and influenced by active pattern,and geomorphological types and distribution can become the index to study active structure and evaluate seismic risk.
出处
《地震研究》
CSCD
北大核心
2001年第3期251-257,共7页
Journal of Seismological Research
