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应用长排列大容量震源地震采集系统与海底地震仪同步联合作业技术,在潮汕坳陷采集了228km多道反射地震资料和5个海底地震仪(OBS)站位的地震数据。多道地震剖面显示,珠江口盆地潮汕坳陷的沉积盖层可分为三个构造层。初步分析认为,上构造层为新近系-第四系,中构造层为下白垩统,下构造层为上三叠统到下侏罗统。OBS记录到了包括莫霍面在内的地震波,可以识别地壳内沉积层、上地壳层、下地壳层等多个层位的折射波地震相。莫霍面深度自北往南减小,在200m水深线附近为27km,至2000m水深线附近为14km。多道地震记录与海底地震仪记录相结合,可以控制从海底到莫霍面的地壳结构。
The seismic data of 228km multi-channel reflection seismic data and 5 seabed seismographs (OBS) stations were collected in the Chaoshan Depression using the synchronous joint operation technology of long array large-capacity seismic source acquisition system and seabed seismometer. Multi-channel seismic profiles show that the sedimentary cover of the Chaoshan Depression in the Pearl River Mouth Basin can be divided into three structural layers. According to the preliminary analysis, the upper structural layer is Neogene-Quaternary, the middle structural layer is Lower Cretaceous and the lower structural layer is Upper Triassic to Lower Jurassic. OBS records seismic waves including the Moho, which can be used to identify the seismic phase of refracted waves in multiple layers such as sedimentary layer, upper crust and lower crust in the crust. The Moho depth decreases from north to south, 27km near the 200m water depth and 14km near the 2000m water depth. Multi-channel seismograms combined with seismograph records control the crustal structure from the sea floor to the Moho.