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*

doi:10.11978/2016076

Abstract

Abstract:

Using offshore airguns and onshore explosions as seismic sources, along with portable seismic stations, permanent seismic stations and Ocean Bottom Seismometer (OBS) as a synchronously receiving array, a onshore-offshore 3D seismic exploration experiment was carried out for the first time in the Zhujiangkou area of the northern South China Sea. This paper introduces in detail the seismic data acquisition, observation system, data preprocessing method, and phase identification. A variety 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 signals simultaneously 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.

Key words: onshore-offshore seismic exploration, 3D, airgun, explosion, ocean bottom seismometer, northern South China Sea

Zuoyong LYU, Xuelin QIU, Chunming YE, Jinlong SUN, Yonghong DUAN, Jinshui LYU. Data processing and phase identification of onshore-offshore 3D seismic exploration in Zhujiangkou area^*[J].Journal of Tropical Oceanography, 2017, 36(3): 80-85.

Figures/Tables 7

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References 15

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编号	爆破时刻	经度	纬度	高程/m	药量/kg
SP3	2015-6-11 02:20:16.088	114°15′22.824″	22°46′17.112″	130	1992
SP5	2015-6-12 02:00:14.678	112°32′11.652″	23°13′51.204″	51	2496
SP2	2015-6-12 02:20:16.183	113°03′34.524″	22°14′24.504″	-10	1992
SP6	2015-6-13 02:10:14.435	113°40′2.532″	23°44′41.460″	241	2496
SP5X	2015-6-19 02:10:13.645	112°50′9.816″	22°50′59.136″	67	1008
SP6X	2015-6-21 02:00:14.478	113°53′43.764″	23°18′52.272″	124	1008

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

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

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