水域地震映像在火成岩发育区的应用与探讨——以厦门某海底隧道勘察为靶区

Application and Discussion of Water Seismic Imaging in Igneous Rock Development Area:Taking Xiamen Subsea Tunnel Survey for Target Area

以厦门某海底隧道勘察为靶区,采用电磁气泡震源系统激发地震波,在火成岩发育区进行水域地震映像实验,较好地查明了海底水深界面、淤泥(砂层)和基岩面的分界线。实验结果表明,水域地震映像法对海域火成岩发育区是一种有效的物探方法,可以为海域地质勘察提供可靠的地质参考依据;利用水域地震映像勘探既可以较好地弥补钻探缺陷,又能极大地节约经济成本。

In this paper,a submarine tunnel in Xiamen is selected as the target area.Using electromagnetic bubble source system seismic wave excitation and the seismic imaging test of igneous rocks,we better identify the water depth of the sea mud（sand）interface,and the bedrock surface boundary.Under the geological background of granite weathering in the igneous rock development area,the bedrock surface has been greatly undulating,and the single drilling method has great limitations.The results show that the seismic image method is an effective geophysical prospecting method for igneous rocks in marine areas,and can provide a reliable geological reference for marine geological exploration.The use of water seismic imaging exploration not only can better compensate for drilling defects,but may also greatly save economic costs.Further,it has higher application value and scientific research value.