首页 | 官方网站   微博 | 高级检索  
     

武威盆地晚更新世河流阶地变形与新构造活动
引用本文:郑文涛,杨景春,段锋军.武威盆地晚更新世河流阶地变形与新构造活动[J].地震地质,2000,22(3):318-328.
作者姓名:郑文涛  杨景春  段锋军
作者单位:1. 北京大学地质学系,北京,100871
2. 北京大学城市与环境学系,北京,100871
基金项目:国家教委高等学校专项科研基金!(4 1310 4 0 2 3),地震联合基金项目!(4 13150 0 0 4 )资助
摘    要:根据武威盆地 7条河流的阶地测量资料和测年数据探讨了河流阶地变形与新构造活动的关系。河流阶地的变形特征反映出新构造活动的方式 ,断层活动以逆冲为主 ,河流阶地的错断状况表明活动断层活动的次数 ,盆地西部活动至少有 7次 ,东部活动至少有 5次 ;同时可表明断层活动的幅度与强度 ,以及不同时期活动强烈区具有迁移变化的特点。武威盆地晚更新世以来发育的第四纪断层主要有 3条 ,各条断裂活动次数、强度不尽相同 ,以山前断裂活动最为强烈 ,至今活动仍未停息。 6 0ka前后西部活动强烈 ,2 0ka以来东强西弱

关 键 词:河流阶地  定量地貌学  新构造活动  武威盆地

A STUDY ON THE RELATION BETWEEN DEFORMATION OF RIVER TERRACES AND NEOTECTONIC ACTIVITY FOR THE WUWEI BASIN
Zheng Wentao,Yang Jingchun,Duan Fengjun.A STUDY ON THE RELATION BETWEEN DEFORMATION OF RIVER TERRACES AND NEOTECTONIC ACTIVITY FOR THE WUWEI BASIN[J].Seismology and Geology,2000,22(3):318-328.
Authors:Zheng Wentao  Yang Jingchun  Duan Fengjun
Abstract:We have studied the relation between the deformation of river terraces and neotectonics activity based on the data of measurement and dating ages of seven fluvial terraces in the Wuwei basin. The deformation characteristics of river terraces reflect the manner of neotectonic activity. The dislocation status of river terraces shows active times, active extents and active intensity of active fault, and the characteristic with migration variations of the most active area in different times. The three Quaternary faults developed since the late Pleistocene epoch in the Wuwei basin and have five periods of activity at least. The active intensity is different for these faults,among which the piedmont fracture activity is the most intensive, and its movement does not stop till present. The activity was stronger about the time 60 ka B.P. in the west and since the time 20 ka B P. in the east.
Keywords:River terraces    Quantitative geomorphology  Neotectonism  Wuwei basin
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号