本文根据反射地震剖面资料,分析大陆边缘的发展阶段,进而将大陆边缘划分出四个时期:初始期、年轻期、成熟期以及老年期。初始期是指在陆棚上很少有复盖,全部或部分暴露。在离散型边缘主要为断块和拉张;而在过渡型边缘主要为褶皱和剪扭。年轻期是指在陆棚上的盆地和海槽中有沉积物充填,同时也有礁的发育。在陆坡上有火山岩,同时只有少量沉积物复盖。在陆隆上没有沉积物。成熟期是指陆棚区有巨厚沉积层复盖。它可以是广布的砂层,其中有珊瑚藻 Based on the data of reflected seismic sections, this paper analyzes the developmental stages of the continental margins, and then divides the continental margins into four periods: initial period, young period, mature period and old age. The initial period is rarely covered in the shelf, all or part of the exposure. In the discrete edge is mainly broken block and stretch; and in the transitional edge mainly folds and shear. Young refers to the accumulation of sediments in basins and troughs on the shelf, as well as the development of reefs. There are volcanic rocks on the slope, with only a small amount of sediment covered. There is no sediment on the land. Maturity refers to the cover area has a thick layer of sediment cover. It can be a wide layer of sand, which has coral algae