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

发布时间：2018-05-30 09:48

本文选题：海陆联测 + 三维　；参考：《热带海洋学报》2017年03期

【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。
[Abstract]:Taking the air-gun and artificial blasting on land as the focal point and using the land-based mobile seismostation, fixed seismic station and submarine seismograph (OBS) to receive the signals simultaneously, the sea and land combined three-dimensional seismic structure exploration was carried out in the Pearl River Estuary region in the northern part of the South China Sea for the first time. In this paper, the seismic data acquisition and observation system, data preprocessing method and seismic phase identification are introduced in detail. Most of the stationary, mobile seismostations and OBS can clearly identify various seismic phases, including the deep seismic phases, such as PGC, Pc, Pm, PnPnSg and so on. The combined use of the air gun and the artificial blasting source and the synchronous receiving of the signals from the ocean-land intensive stations can effectively improve the ray coverage and crossover of the sea-land transitional zone and lay a foundation for obtaining the crustal fine structure of the sea-land transitional zone in the study area.
【作者单位】：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;中国科学院大学;中国地震局地球物理勘探中心;
【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~~
【分类号】：P315.7;P738.4

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