Morphometric analysis of the Andaman outer shelf and upper slope——Implications for the recent slope failure events  

作　　者：Pachoenchoke Jintasaeranee Anond Snidvongs 

机构地区：[1]Department of Aquatic Science,Faculty of Science,Burapha University,Chonburi 20131,Thailand [2]Department of Marine Science,Faculty of Science,Chulalongkorn University,Bangkok 10330,Thailand

出　　处：《Acta Oceanologica Sinica》2023年第9期44-52,共9页海洋学报（英文版）

基　　金：The Financial Support Jointly by the National Research Council of Thailand and the German Research Foundation。

摘　　要：The devastating 2004 tsunamis that hit the southwestern coast of Thailand pose a serious threat to people along the coastal zone. A major aim for the tsunami hazard prediction is better prediction of the next tsunamis and their impacts. In this paper, we present the first implications of recent slope failure events of the Andaman outer shelf and upper slope based on a new detailed bathymetric data and subbottom profiler records acquired during two cruises of the MASS project in 2006 and 2007. Morphometric analysis reveals a variety of anomalous features,including: three large plateaus surrounded by moats, ruggedness and unevenness of slope morphology, and two translational submarine landslides. Two submarine landslides are studied from the detailed bathymetric data and subbottom profiler record covering the upper slope of the Andaman Sea shelf break within Thai exclusive economic zone. Maximum approximated volumes of both displaced masses are 4.8×10~7 m~3 and 2.2×10~7 m~3.Considering the data, there is no evidence that landslides have been the sources for tsunami hazard potential in recent geological time. These prerequisites will allow better study of slope failure events in the area. Further investigation is required to better understand obvious geotectonic phenomena.

关 键 词：Andaman slope failure submarine landslide BATHYMETRY hazard potential 

分 类 号：P73[天文地球—海洋科学]