珠江口区域海陆联合三维地震构造探测的数据处理与震相识别  

Data processing and phase identification of onshore-offshore 3D seismic exploration in Zhujiangkou area

作　　者：吕作勇[1,2,4] 丘学林[1,4] 叶春明[2] 孙金龙[1] 段永红[3] 吕金水[2] LYU Zuoyong;QIU Xuelin;YE Chunming;SUN Jinlong;DUAN Yonghong;LYU Jinshui(CAS Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Guangzhou 510301, China;Key Laboratory of Earthquake Monitoring and Disaster Mitigation Technology, China Earthquake Administration, Key Laboratory of Guangdong Province Earthquake Early Warning and Safety Diagnosis of Major Projects, Earthquake Administration of Guangdong Province, Guangzhou 510070, China;Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院边缘海与大洋地质重点实验室(南海海洋研究所),广东广州510301 [2]广东省地震局,中国地震局地震监测与减灾技术重点实验室,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 [3]中国地震局地球物理勘探中心,河南郑州450002 [4]中国科学院大学,北京100049

出　　处：《热带海洋学报》2017年第3期80-85,共6页Journal of Tropical Oceanography

基　　金：地震科技星火计划项目(XH16029Y);国家自然基金面上项目(41676057;41674092);广东省局合作项目~~

摘　　要：以海上气枪和陆地人工爆破作为震源,利用陆地流动地震台站、固定地震台站和海底地震仪(OBS)同步接收信号,首次在南海北部珠江口区域进行了海陆联合三维地震构造探测。文章详细介绍了此次海陆联测的地震数据采集和观测系统、数据预处理方法和震相识别。固定、流动地震台站和OBS大部分均能较清晰地识别出多种震相,包括Pg、Pc P、Pm P、Pn、Sg等深部震相。气枪和人工爆破震源的联合使用以及海陆密集台站的同步接收信号,有效地提高了海陆过渡带的射线覆盖和交叉程度,为获取研究区海陆过渡带的地壳精细结构奠定了基础。Using offshore airguns and onshore explosions as seismic sources,along with portable seismic stations,permanentseismic stations and Ocean Bottom Seismometer(OBS)as a synchronously receiving array,a onshore-offshore3D seismicexploration experiment was carried out for the first time in the Zhujiangkou area of the northern South China Sea.This paperintroduces in detail the seismic data acquisition,observation system,data preprocessing method,and phase identification.Avariety of seismic phases,including Pg,PcP,PmP,Pn,and Sg,can be clearly identified in most data collected by the permanent,portable seismic stations and OBS.Jointly using airgun and explosion sources,and dense stations receiving seismic signalssimultaneously both on land and at sea,it can highly improve the ray coverage and cross overlap beneath the onshore-offshore transitional belt,which lays a foundation for obtaining fine crustal structure beneath such onshore-offshore area.

关 键 词：海陆联测 三维 气枪震源 人工爆破 海底地震仪 南海北部 

分 类 号：P738.4[天文地球—海洋地质]