白河-谷城断裂带中段构造变形特征与第四纪活动性  

STUDY ON TECTONIC DEFORMATION AND QUATENARY ACTIVITY OF MIDDLE SEGMENT OF BAIHE-GUCHENG FAULT BELT

作　　者：雷东宁[1,2] 蔡永建[1,2,3] 乔岳强[1,2] 余松[1,2] 吴建超[1,2] 缪卫东[1,2] 

机构地区：[1]中国地震局地震研究所(地震预警湖北省重点实验室),武汉430071 [2]武汉地震工程研究院,武汉430071 [3]中国地质大学(武汉)地球科学学院,武汉430074

出　　处：《大地测量与地球动力学》2012年第5期41-47,共7页Journal of Geodesy and Geodynamics

基　　金：中国地震局地震研究所所长基金(IS200856069)

摘　　要：通过地质地貌、断层物质测年及第四纪沉积物测年等方法,对白河-谷城断裂带中段构造变形、活动性进行了初步分析。认为断裂带经历了多期构造变形,分带性明显;断裂带及周缘地区第四纪晚更新中期以来抬升速率为0.64～0.85 mma-1;在早第四纪有明显活动,断裂带活动方式以左旋走滑为主;邻近断裂带周边地区小震在时间上具有增强的趋势,与断裂带的第四纪活动具有构造上的联系。Through field survey,with geological and geomorpohologic methods and dating the fault gouge and Quaternary sediments,we made certain study on tectonic deformation and activity of the middle segment of Baihe-Gucheng fault.Some conclusions can be drawn that the fault belt suffered from multi-stage tectonic deformation and it is clearly zoning.The lifting velocity of fault and its neighbouring area ranges from 0.64 mma-1 to 0.85 mma-1 since the Middle stage of Late Pleistocene.The fault was predominantly active in the Early Quaternary with sinistral slip component.The seismicity of fault and nearby tends to enhance in time domain and is tectonically relatated to the fault in spatial domain.

关 键 词：白河-谷城断裂带 构造变形 第四纪活动性 抬升速率 左旋走滑 

分 类 号：P551[天文地球—构造地质学]