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.
Method for determining the foot point of continental slope in complex geological background:Take the southern continental margin of Mozambique as an example
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.
delimitation of continental shelffoot point of slopeaverage gradient changessouthern continental margin of Mozambique
万方数据
维普
