江苏滩涂区浅层地震探测方法技术应用  

Application of shallow seismic exploration method in Tidal-flat region of Jiangsu Province

作　　者：张保卫[1,2] 张凯 岳航羽[1,2] 王凯 陈德元 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]国家现代地质勘查工程技术研究中心,河北廊坊065000

出　　处：《物探与化探》2018年第1期144-153,共10页Geophysical and Geochemical Exploration

基　　金：中国地质调查局二级项目"江苏沿岸滩涂区综合地球物理调查(试点)"(DD20160151);中国地质科学院地球物理地球化学勘查研究所结余资金项目"滩涂区地球物理勘查施工方法试验"(JY201703)

摘　　要：针对海陆衔接带地质调查工作不足、现有地球物理调查手段缺失等问题,在江苏省南通市如东县试点滩涂区开展浅层反射地震探测方法技术试验研究。该浅层反射地震探测选用锤击震源激发,自然频率60 Hz的检波器接收。通过试验确定了合理的观测系统参数及仪器记录参数,获得了能清晰反映第四系地质结构的高精度浅层反射地震剖面,并据此总结了在滩涂区开展浅层地震探测影响数据采集的因素,为在滩涂区开展浅层地震探测工作提供了经验性建议。通过此次浅层地震工作,探测到测区内第四系底界面位置,并对第四系内部层位进行了划分,查明了测线敷设范围内的隐伏活动断裂,发现了测线敷设范围内浅层气的存在,并圈定了浅层气沿测线方向的分布范围。In view of the lack of geological investigation and the lack of existing geophysical survey methods on Intertidal zone, the technical research of shallow reflection seismic exploration method is carried out in the tidal flat area of Rudong County, Nantong City, Jiangsu Province. The shallow reflection of seismic detection using hammer source and the natural frequency of 60 Hz detector. Through the experiment, the reasonable parameters of the observation system and the instrument are determined, and the high-precision shallow reflection seismic profile which can clearly reflect the Quaternary geological structure is obtained, and unfavorable factors of the shallow seismic exploration data acquisition in the beach area are summarized, provides empirical advice for carrying out shallow seismic exploration in the beach area. From the shallow seismic profile, the location of the Quaternary bottom interface in the survey area is detected, and the internal layers of the Quaternary is divided, and the hidden faults in the laying range are found out. Found shallow gas in Line laying within the scope, and delineated the distribution of shallow gas along the direction of the line.

关 键 词：滩涂区 浅层地震 锤击震源 叠前去噪 浅层气 

分 类 号：P631.4[天文地球—地质矿产勘探]