摘要
据野外地震地质调查研究,柳州市柳北区存在多条隐伏断裂带,这些断裂带的具体位置尚未确定,这对柳北区的建设发展存在极大隐患。为此,在地质调查的基础上,本文采用高密度电法和地震映像综合方法来探测柳北区隐伏断裂带的具体位置,通过钻探验证和地质调查研究,确定了隐伏断裂带的具体位置,并查明这些隐伏断裂带的几何学和运动学特征。结果表明,白马断裂为北北东向的早第四系断裂,西流断裂为北东向的早第四系断裂,柳钢断裂为南北向的早-中更新世断裂。综合表明,这些隐伏断裂带晚更新世以来不活动,柳州市柳北区的建设发展可不采取避让措施,这为柳州市柳北区的建设发展提供安全保障。
Field investigations of earthquake geology show many buried fault zones existing in the Liubei District of Liuzhou City,of which the specific locations remain undetermined,and whether they are active is still unclear.Based on geological surveys,this work uses two geophysical methods,i.e.,high-density resistivity and seismic imaging,to explore these hidden fault zones and proves the results by drilling.Analysis of anomalies from these surveys permits to map three faults including their specific positions,strikes and widths.Then,it s proved that the locations of buried faults and the geophysical anomaly are the same place with drilling and geological survey,and the geometric and kinematic characters are also clearly identified.The research result shows that the active age of NNE Baima fault and NE Xiliu fault was early Quaternary,and SN Liugang fault was early-middle Pleistocene.Therefore,these buried faults are not active since late Pleistocene,the economic construction of Liubei region dosen t need to be away from these buried faults.This work can provide some safety and security for the development of Liubei region.
作者
吴教兵
高鹏飞
陆俊宏
黎峻良
蒙南忠
潘黎黎
WU Jiaobing;GAO Pengfei;LU Junhong;LI Junliang;MENG Nanzhong;PAN Lili(Earthquake Administration of the Guangxi Zhuang Autonomous Region,Nanning,Guangxi530022)
出处
《地质与勘探》
CAS
CSCD
北大核心
2019年第4期1026-1035,共10页
Geology and Exploration
基金
广西科学研究与技术开发计划项目(编号:桂科AB17195022,桂科AB18126040)资助
关键词
隐伏断裂带
高密度电法
地震映像
柳州
广西
buried fault zone
high density resistivity
seismic image
Liuzhou
Guangxi
