Storm Liquefaction Deposits:A Possibility of Time Reversal in Sedimentary Strata of an Estuarial Coastal Area  

作　　者：XU Guohui REN Yupeng HU Guanghai LIU Zhiqin SUN Yongfu LIN Lin 

机构地区：[1]Key Laboratory of Marine Environment and Ecology,Ministry of Education,Ocean University of China,Qingdao 266100,China [2]Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering,Ocean University of China,Qingdao 266100,China [3]Key Laboratory of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Ocean University of China,Qingdao 266100,China [4]First Institute of Oceanography,Ministry of Natural Resource,Qingdao 266061,China [5]National Deep Sea Center,Qingdao 266237,China

出　　处：《Journal of Ocean University of China》2024年第4期961-969,共9页中国海洋大学学报（英文版）

基　　金：funding for this project was provided by the National Natural Science Foundation of China (No.41976049)。

摘　　要：In the sedimentary strata dating of estuarial coastal areas,it is often found that there is phenomenon of time-reversal in strata.The seabed sediments could be liquefied under storm waves.A laboratory wave flume experiment demonstrated that storm-induced liquefaction deposits are formed by the oscillations of liquefied sediments.In this paper,the particle size distribution and ^(210)Pb_(ex) specific activity of the sediment samples from the liquefaction disturbed zone and adjacent stable zone of the Yellow River Delta were tested.The stratigraphic divisions based on storm liquefaction deposit sequence can effectively explain the vertical changes in particle size and ^(210)Pb_(ex) specific activity.Due to the differentiation of particles during the storm induced liquefaction,coarse and fine particles regrouped,which could explain the phenomenon of time-reversal in dating data.

关 键 词：^(210)Pb_(ex)specific activity liquefaction deposition REVERSAL sediment 

分 类 号：P736[天文地球—海洋地质] P744[天文地球—海洋科学]