SPAC法在海口江东新区新近纪-第四纪地层精细划分中的应用  

Application of SPAC Method on to the Fine Division of Neogene-QuaternaryStrata in Haikou Jiangdong New District

作　　者：钟宙灿 蔡水库 刘巧霞[4] 张前[2] 章雪松 张匡华 王富 ZHONG Zhou-can;CAI Shui-ku;LIU Qiao-xia;ZHANG Qian;ZHANG Xue-song;ZHANG Kuang-hua;WANG Fu(Key Laboratory of Marine Geological Resources and Environment of Hainan Province,Haikou 570206,China;Comprehensive Institute of Geological Investigation of Hainan Province,Haikou 570206,China;Institute of Geological Survey of Hainan Province,Haikou 570206,China;Geophysical Exploration Center of China Earthquake Administration,Zhengzhou 450002,China;Marine of Geological Survey of Hainan Province,Haikou 570206,China)

机构地区：[1]海南省海洋地质资源与环境重点实验室,海口570206 [2]海南省地质综合勘察院,海口570206 [3]海南省地质调查院,海口570206 [4]中国地震局地球物理勘探中心,郑州450002 [5]海南省海洋地质调查研究院,海口570206

出　　处：《科学技术与工程》2023年第36期15393-15403,共11页Science Technology and Engineering

基　　金：海南省海洋地质资源与环境重点实验室自主课题(22-HNHYDZZYHJKF023,HNHYDZZYHJZZ003)。

摘　　要：微动探测技术作为一种新型的地球物理勘探方法,已成为工程地质勘察及隐伏地质构造探测的重要手段。基于微动探测空间自相关(spatial autocorrelation,SPAC)法基本原理,选取研究区内121个微动测点及6个地质钻孔,比对单点S波速度结构与钻孔岩性结构,结果显示岩性界面探测精度在0.44%~5.54%,表明微动探测法划分岩性差异较大的地层界面是可靠的;结合二维视横波速度剖面识别出区内地层单元及隐伏地质构造,取得了较好的地质效果,为海口江东新区新近纪-第四纪地层单元划分提供数据支撑。As a new geophysical exploration method,microtremor detection technology become an important technology for engineering geological investigation and survey of the buried fault structure.Based on the principle of spatial autocorrelation(SPAC)method,the single point S-wave velocity structure and the lithologic structure of the boreholes were compared by selecting 121 data and 6 geological boreholes in study area.The results show that the detection accuracy of lithologic interface is between 0.44%and 5.54%,which indicates that the microtremor detection technology is reliable in dividing the stratigraphic interface with large differences of lithologic.In combination with the 2D apparent S-wave velocity structure,the stratum units and buried fault in the study area are identified,and achieving better geological effects,proving data support for division of Neogene-Quaternary stratigraphic units in Jiangdong New District of Haikou.

关 键 词：SPAC法 海口江东新区 新近纪-第四纪 S波速度结构 

分 类 号：P631[天文地球—地质矿产勘探]