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为了研究渤海—山东半岛—南黄海一线的深部构造特征,利用海区气枪震源和陆区爆破震源探测,于2013年在胶东、渤海和南黄海布设了一条海陆联合深部地震探测剖面。海陆联测剖面包括渤海和南黄海两条海底地震仪(Ocean Bottom Seismometer,OBS)测线和一条陆上地震测线,是首次在南黄海地区布设的OBS深地震测线。文章对南黄海段测线上的海底地震仪数据进行了数据预处理,其中包括地震数据解编处理、截裁处理等,结果表明,此次实验海底地震仪记录质量良好,可以清晰地识别出Ps、Pg、Pm P等多组震相,还首次观察到了来自千里岩隆起带上的P波震相,说明数据处理流程是可行的;再结合地质地球物理资料,初步分析了南黄海不同构造单元的震相特征,为下一步地壳速度结构的模拟及解释工作奠定了良好的基础。
In order to study the deep structural features of the Bohai-Shandong Peninsula-South Yellow Sea coastline, a sea-land joint deep seismic exploration profile was set up in 2013 in Jiaodong, Bohai and South Yellow Sea using the airgun source in the sea area and the source of continental explosions. The sea-continent joint profile consists of two Ocean Bottom Seismometer (OBS) lines and one onshore seismic line in the Bohai Sea and the South Yellow Sea. It is the first OBS deep seismic survey line to be deployed in the southern Yellow Sea. The paper preprocessed the seabed seismograph data on the survey line of the South Yellow Sea, including the seismic data disassembly processing and the cut-off processing. The results show that the experimental seabed seismograph has a good record quality and can be clearly identified Ps, Pg, Pm P and so on. It is also the first time to observe the P-wave facies from the Qianlianyan uplift, which shows that the data processing flow is feasible. Combined with the geophysical and geophysical data, the paper analyzes the different structures of the South Yellow Sea The seismic facies characteristics of the unit laid a good foundation for the simulation and interpretation of the crustal velocity structure in the next step.