Inversion of Seabed Geotechnical Properties in the Arctic Chukchi Deep Sea Basin Based on Time Domain Adaptive Search Matching Algorithm  

作　　者：AN Long XU Chong XING Junhui GONG Wei JIANG Xiaodian XU Haowei LIU Chuang YANG Boxue 

机构地区：[1]Jiangsu Automation Research Institute,Lianyungang 222061,China [2]Key Laboratory of Submarine Geosciences and Prospecting Techniques,MOE and College of Marine Geosciences,Ocean University of China,Qingdao 266100,China [3]Laboratory for Marine Mineral Resources,Qingdao Marine Science and Technology Center,Qingdao 266071,China

出　　处：《Journal of Ocean University of China》2024年第4期933-942,共10页中国海洋大学学报（英文版）

基　　金：supported by the National Key R&D Program of China (No.2021YFC2801202);the National Natural Science Foundation of China (No.42076224);the Fundamental Research Funds for the Central Universities (No.202262012)。

摘　　要：The chirp sub-bottom profiler,for its high resolution,easy accessibility and cost-effectiveness,has been widely used in acoustic detection.In this paper,the acoustic impedance and grain size compositions were obtained based on the chirp sub-bottom profiler data collected in the Chukchi Plateau area during the 11th Arctic Expedition of China.The time-domain adaptive search matching algorithm was used and validated on our established theoretical model.The misfit between the inversion result and the theoretical model is less than 0.067%.The grain size was calculated according to the empirical relationship between the acoustic impedance and the grain size of the sediment.The average acoustic impedance of sub-seafloor strata is 2.5026×10^(6) kg(s m^(2))^(-1)and the average grain size(θvalue)of the seafloor surface sediment is 7.1498,indicating the predominant occurrence of very fine silt sediment in the study area.Comparison of the inversion results and the laboratory measurements of nearby borehole samples shows that they are in general agreement.

关 键 词：time domain adaptive search matching algorithm acoustic impedance inversion sedimentary grain size Arctic Ocean Chukchi Deep Sea Basin 

分 类 号：P744[天文地球—海洋科学] P714