基于钻探的芦花台隐伏断层晚第四纪活动特征  

ACTIVITY CHARACTERISTICS OF LUHUATAI BURIED FAULT SINCE LATE QUATERNARY REVEALED BY DRILLING

作　　者：雷启云[1,2] 柴炽章[2] 杜鹏[2] 王银[2] 孟广魁[2] 

机构地区：[1]中国地震局地质研究所,北京100029 [2]宁夏回族自治区地震局,银川750001

出　　处：《地震地质》2011年第3期602-614,共13页Seismology and Geology

基　　金：全国地震重点监视防御区活断层危险性评价项目(1520930027);地震行业科研专项经费项目(201008003)共同资助

摘　　要：芦花台断层是银川盆地内一条重要的隐伏构造。在浅层地震勘探成果的基础上,开展了钻孔联合剖面探测和钻孔样品测试,获得了断层上断点埋深、最新活动时代、晚第四纪累计位移和滑动速率等数据。结果表明:芦花台隐伏断层北段和南段的活动性不同,南段为中更新世末活动断层,北段为全新世活动断层;在北段内,断层活动强度在空间上表现为由北向南增强,在时间上表现为晚更新世活动强于全新世。Luhuatai Fault is one of the important buried tectonics in Yinchuan Basin.Based on the results of shallow seismic exploration,we conducted composite drilling section exploration and dating of the samples of borehole.Some useful data of the fault were obtained,such as the depth of upper breaking point,the latest activity age,displacement in late Quaternary,and slip rates,etc.This study shows that the activity is different between the north and south segment along Luhuatai Fault.The north segment is a Holocene fault,while the south segment is a late mid-Pleistocene fault.From north to south along the north segment of Luhuatai Fault,the activity has enhanced,and the faulting is stronger in late Pleistocene than Holocene.

关 键 词：隐伏活断层 钻孔联合剖面 滑动速率 

分 类 号：P315.2[天文地球—地震学]