1. Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China 2. National Center for Geological Exploration Technology,Langfang 065000,China 3. College of GeoExploration Science and Technology,Jilin University,Changchun 130026,China
Due to the restriction of geological detection equipment and tidal time,the degree of geological exploration in coastal tidal-flat areas is low and the detection accuracy is insufficient,which cannot meet the demand of high-precision geological survey in this area.Conventional shallow seismic exploration technology can effectively detect Quaternary bottom interface and internal horizons in the coastal tidal flats,but it has a complex and inefficient data-acquisition equipment,which directly restricts the progress of seismic exploration in this area.Therefore,this paper proposes a high-precision shallow seismic detection technology which is suitable for coastal tidal-flat areas.It can effectively solve the above difficulties by making full use of the surface characteristics in coastal tidal flats and using modified towed seismic detection equipment to acquire field data,thus providing a new idea for seismic detection in this area.At the same time,a set of seismic signal extraction process and method combinations are made for coastal tidal-flat areas,which can retain effective seismic reflection information to the greatest extent and restore the underground geological structure.The results of the application show that the technology can provide reliable data support for the fine division of subsurface in the coastal tidal flats.
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