水域浅层地震勘探在东莞市活断层探测中的应用  

Application of Shallow Marine Water Seismic Exploration in Active Fault Detection in Dongguan Area

作　　者：盛强[1,2,3] 郭良田 安好收[4] 罗传根 Sheng Qiang;Guo Liangtian;An Haoshou;Luo Chuangen(Guangdong Earthquake Agency,Guangzhou 510070,China;Key Laboratory of EarthquakeMonitoring and Disaster Mitigation Technology,CEA,Guangzhou 510070,China;Key Laboratoryof Guangdong Province Earthquake Eady Warning and Safety Diagnosis of Major Projects,Guangzhou510070,China;Geological Exploration Technology Institute of Jiangsu Province,Nanjing 210008,China)

机构地区：[1]广东省地震局,广东广州510070 [2]中国地震局地震监测与减灾技术重点实验室,广东广州510070 [3]广东省地震预警与重大工程安全诊断重点实验室,广东广州510070 [4]江苏省地质勘查技术院,江苏南京210008

出　　处：《防灾科技学院学报》2018年第3期31-37,共7页Journal of Institute of Disaster Prevention

摘　　要：为探明南坑—虎门断裂在东莞地区部分水域中的展布情况,采用小道距、高频率水域地震反射法,针对不同的观测系统与采集参数等进行试验。所获得的地震时间剖面揭示出的基岩反射界面连续完整,第四系地层内未发现明显错断。而测线Ⅲ所在的地震时间剖面上所解释的f3断点两侧基岩高差为8m,上断点埋深为83m。综上分析推测南坑—虎门断裂第四纪以来没有明显的活动迹象。同时,所获得的研究成果可为东莞地区乃至珠三角地区水域浅层地震勘探探测活断层提供参考和借鉴。In order to detect the distribution of Nankeng-Humen fracture in some part of the water area in Dongguan,we conduct a test on the different observation systems and acquisition parameters by small group interval and highfrequency shallow marine seismic exploration. The acquired earthquake time section indicates that the bedrockreflection interface is continuous and complete, without obvious fault feature in the quaternary strata, whileearthquake time section on Line Ⅲ shows that the bedrock elevation difference between both sides of the breakpoint f3is 8 m and the cover depth of the upper breakpoint is 83 m. To sum up, it’ s estimated that there have been noobvious signs of activity in Nankeng-Humen Fault since the quaternary period, and the research results will serve as areference for shallow marine water seismic survey in active faults in Dongguan and even in the Pearl River Delta.

关 键 词：地球物理勘探 水域浅层地震勘探 地震反射法 城市活断层探测 南坑—虎门断裂 

分 类 号：P315.24[天文地球—地震学]