复杂地质背景下大陆坡脚点的确定方法:以莫桑比克南部陆缘为例  

Method for determining the foot point of continental slope in complex geological background:Take the southern continental margin of Mozambique as an example

作　　者：庄宝江 唐勇 吕孝辉[6] 杨春国 吴招才 李赫 ZHUANG Baojiang;TANG Yong;LU Xiaohui;YANG Chunguo;WU Zhaocai;LI He(Second Institute of Oceanography,MNR,Hangzhou 310012,China;Key Laboratory of Submarine Geosciences,MNR,Hangzhou 310012,China;School of Oceanography,Shanghai Jiao Tong University,Shanghai 200030,China;Hubei Key Laboratory of Marine Geological Resources,China University of Geoscience,Wuhan 430074,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519000,China;Beijing Dynovision Technology Co.,Ltd.,Beijing 102200,China)

机构地区：[1]自然资源部第二海洋研究所,浙江杭州310012 [2]自然资源部海底科学重点实验室,浙江杭州310012 [3]上海交通大学海洋学院,上海200030 [4]中国地质大学(武汉)海洋地质资源湖北省重点实验室,湖北武汉430074 [5]南方海洋科学与工程广东省实验室(珠海),广东珠海519000 [6]北京大业嘉成科技有限公司,北京102200

出　　处：《海洋学研究》2024年第1期13-22,共10页Journal of Marine Sciences

基　　金：国家自然科学基金项目(41830537);国家重点研发计划项目(2017YFC1405504);“全球变化与海气相互作用”专项二期任务(GASI-01-DLJHJ-CM)。

摘　　要：针对复杂地质背景下的大陆架划界问题,提出了一种新的大陆坡脚点(foot point of the continental slope,FOS)确定方法。该方法基于水深平均梯度变化计算坡脚点所在位置,并结合相反证明以及凸包性、分段性、连续性原则进行优化。以莫桑比克南部陆缘为研究区域,利用2021年实测的高精度多波束地形数据,应用该方法提取了大陆架划界最关键的依据——FOS,并与联合国大陆架界限委员会使用的Geocap软件提取的结果进行对比,确认了相同的FOS位置,证明该方法是准确有效的。A new method for determining the foot point of the continental slope(FOS)was proposed for the delineation of the continental shelf in a complex geological context.This method calculated the location of the foot of slope based on the mean gradient of water depth and optimized it by combining the contrary evidence and the principles of convexity,segmentation and continuity.Using the southern continental margin of Mozambique as the study area,the method was applied to extract the most critical basis—FOS for continental shelf delineation using high-precision multibeam topographic data measured in 2021,and the result was confirmed by comparison with those extracted by the Geocap software which is used by the United Nations Commission on the Limits of the Continental shelf,proving the effectiveness and accuracy of this method.

关 键 词：大陆架划界 大陆坡脚点 平均梯度变化 莫桑比克南部陆缘 

分 类 号：P229.6[天文地球—大地测量学与测量工程]