基于浅剖的莫桑比克脊海底地形地貌特征分析  

Characteristics analysis for seafloor topography and geomorphology of the Mozambique Ridge based on Sub-bottom profile

作　　者：陈鹏发 苏冰 宋俊 杨华 孟雷 CHEN Pengfa;SU Bing;SONG Jun;YANG Hua;MENG Lei(92578 Troops,Beijing 100161,China)

机构地区：[1]92578部队,北京100161

出　　处：《海洋测绘》2023年第1期24-28,共5页Hydrographic Surveying and Charting

摘　　要：海底地形地貌包括宏观地形与微地貌,对地球科学研究、经济、军事等具有重要作用。为对莫桑比克脊地形地貌特征有更全面的认识,基于“大洋科考”某航次采集于西南印度洋莫桑比克脊区域的浅剖资料,利用浅地层剖面反射特征识别与分类方法,把不同的反射特征解译为对应的微地貌,首次对研究区宏观地形及典型微地貌特征进行分析和归纳。结果表明:研究区为多阶地海底地形,可能为断裂活动或不同期次熔岩流作用的结果,同时还发育着等深流沉积、重力流沉积、冲刷槽、侵蚀水道等多种典型微地貌,且不同类型微地貌的分布位置基本满足沉积动力学规律。为研究其他海底高地的地形地貌特征提供了一定的参考。Submarine topography and geomorphology includes macroscopic topography and microtopography,and plays an important role in earth science research,economy and military affairs.In order to have a more comprehensive understanding of the topography and microtopography characteristics of the Mozambique Ridge,Based on the sub-bottom profile data collected from the Mozambique Ridge region in the southwest Indian Ocean during the 49 thu Oceanic scientific Expeditionn,by using the recognition and classification method of reflection features in the sub-bottom profile,different reflection features are translated into corresponding microtopography,the macroscopic topography and typical microtopography characteristics in the study area are analyzed and summarized for the first time in this paper.The results show that the study area is a multi-terrace submarine topography,which may be the result of fault activity or different periods of lava flow,at the same time,there are also a variety of typical microtopography,such as current depositions,gravity flow slumps,scour channels and erosion channels,and the distribution of different microtopography basically meets the law of sedimentary dynamics.It provides a certain reference for the study of the topography and microtopography characteristics of other seabed highlands.

关 键 词：浅地层剖面探测 海底地形地貌 反射特征识别 海底高地 莫桑比克脊 

分 类 号：P229.1[天文地球—大地测量学与测量工程]