| 摘要: |
| 利用海上大容量气枪震源、陆上地震台站(包括流动台站和固定台站)和海底地震仪首次在台湾海峡地区开展了深地震探测试验。试验结果表明，“延平2 号”科考船气枪枪阵信号最远传播距离达280km，成功获得了数万道高质量的地震数据，并且识别了不同类型的P 波震相。HX9 剖面一维地壳结构模型表明，由2 个速度间断面产生的Pc 及PmP 两组反射波和基底折射波( Pg)所反映的地壳结构构成了该区基本的地壳结构特征，康拉德界面和莫霍界面的深度分别为16. 0 ～ 17. 5、28. 0 ～ 29. 5km。 |
| 关键词: 台湾海峡 深地震探测 气枪震源 地壳结构 |
| DOI： |
| 分类号: |
| 基金项目:福建省地震局青年科技基金(Y201407)资助 |
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| Deep seismic exploration in the Taiwan Strait: the experiment of HX9 survey line and preliminary results |
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Yan Pei, Zhang Yifeng, Li Puchun, Wang Sun
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Research Center of Earthquake Reconnaissance of Xiamen，Earthquake Administration of Fujian Province，Xiamen 361021，Fujian，China
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| Abstract: |
| By using marine large volume air-gun seismic source and land seismic stations ( including mobile stations and permanent stations) and Ocean Bottom Seismometers，a deep seismic exploration experiment was carried out for the first time in the Taiwan Strait． Experiment result showed the seismic stations could receive the seismic signals from the air-gun arrays of the “YANPING 2”science investigation ship as far as 280km away． Tens of thousands of high quality seismic data were obtained successfully and different types of P-wave seismic phases were identified． A one dimensional crustal structure model about HX9 section shows that the crustal structure which is reflected by Pc and PmP reflection wave from two velocity discontinuity surfaces and basement refraction wave ( Pg) constitutes the basic characteristic of the crustal structure in this region． The depth of Conrad discontinuity and Moho discontinuity is respectively 16． 0 ～ 17. 5km and 28． 0 ～ 29． 5km． |
| Key words: Taiwan Strait Deep seismic exploration Air-gun seismic source Crustal structure |
