<p> The foot of the continental slope is an important topographical feature of the continental margin. Its the basis for coastal states to extend its continental shelf rights and to delimit the outer limit of the continental shelf beyond 200 nautical miles. Its also an important technical parameter that the Commission on the Limits of the Continental Shelf pays special attention to when considering the submissions of coastal states. The formulation of the continental shelf regime in Article 76 of the United Nations Convention on the Law of the Sea originates from the typical passive continental margin. However, due to the diversity and complexity of the global continental margin, especially the transformation and influence of late tectonic activities and sedimentation on the continental margin, the seabed topography is extremely complex and changeable, which makes it very difficult to identify the foot of the continental slope. In addition, in order to obtain the largest extent of the outer continental shelf, each coastal state has interpreted the relevant provisions of the foot of the continental slope in their own favor, making the foot of the continental slope a hot and controversial issue in the delimitation of the outer continental shelf. Based on the provisions of the United Nations Convention on the Law of the Sea and the "Scientific and Technical Guidelines of the Commission on the Limits of the Continental Shelf" on the foot of the continental slope, combined with the geological characteristics of different types of continental margins and the delimitation practice of various coastal states, the determination of the base of the continental slope, the selection of the point of greatest change and the application of the evidence to the contrary are discussed.</p><p> <br></p>

大陆坡脚点是200海里以外大陆架划界的核心界限点。根据《海洋法公约》第七十六条的规定和大陆架界限委员会的相关技术要求，论述了大陆坡脚点的确定方法和技术流程。通过对地形、坡度、二阶导数及D-P剖面的综合分析，提出基于二阶导数极值点和D-P算法的二次简化方法，以及原始剖面和D-P剖面的二次求导方法，通过7大步骤简化原始剖面，并给出数据点坡度、水深和二阶导数，以及曲线凹凸性、连续性和分段性等多重判定方法，实现了大陆坡脚点的自动识别。完成程序算法的底层开发，获得了与国际商用划界软件相一致的结果，并采用多波束实测水深数据对所提出的技术方法进行了有效性验证。

The foot of continental slope is an important terrain characteristic and is a basic evidence to get the out limit line of the expansion continental shelf right.Based on the ArcGis Engine platform,depended on our country multi－scales basic geography data and bathymetirc data,and strictly obeyed the United Nations article 76,the outside continental shelf slope point is gained according to seabed terrain data,then appropriate point is automatically choose to produce the foot line of continental slope.The research to the foot line of the continental shelf is very important for us to get the out limit line and regard our country.

西太平洋的重磁异常和构造格架一直是研究的热点，本文使用最新的覆盖全球的重力和磁力数据，在前人研究的基础上，重新对西太平洋洋陆过渡带的重力异常进行了研究，使用离散小波变换、解析延拓和ParkerOldenburg迭代反演法，反演得到了西太平洋莫霍面深度，结合水深地形数据，得到地壳厚度；通过对地壳厚度的分析，结合磁异常场分布，重新绘制了该区的超壳断裂体系分布图，明确了断层对西太平洋构造格架的控制作用，在此研究基础上，海陆综合考虑，结合地块构造层序列、沉积建造、变质作用以及构造演化历史，以地块之间的蛇绿岩带、洋陆转换带、俯冲带和洋中脊作为二级构造单元的分界线，对东亚大陆构造域和东亚大陆边缘构造域划分出9个二级构造单元和40个三级构造单元，依据地壳类型、位置与板块边缘的性质以及动力学模式，划分了中国近海24个盆地的类型，明确了西太平洋中国海的现今基本构造格局及演化特征。