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苏北岸外浅滩位于苏北新洋港——吕泗港之间的岸段外围,它是以弶港湾为中心向海呈幅射状展布的巨大砂体。南北长约200公里,东西宽近100公里,面积宽广,形态特殊,地形复杂,是南黄海西南部独特的地貌类型。关于浅滩的成因至今说法不一,有的认为是海面上升过程中形成的水下阶地,有的认为是早期的残留砂体,还有的认为是两股沿岸流在琼港的相遇,水位抬高产生梯度流向海扩散而形成的辐射砂体。因此,进一步探讨它的物质来源、形成机理、发育过程及演变趋势,有很重要的地质意义。近几年来,我们对浅滩进行了海洋地质综合调查,为研究它的成因提供了重要的依据。
The shoal of the bank of the northern Jiangsu coast is located on the periphery of the shores of Xindang Port - Lvsi Harbor in northern Jiangsu Province. It is a huge sand body radiating to the sea centering on Qiong Harbor. About 200 km long from north to south, east-west width of nearly 100 km, a wide area, special shape, complex terrain, southwestern South Yellow Sea is a unique landscape type. The reasons for the shoal have different opinions so far, some believe that the formation of sea surface during the formation of submarine terraces, and some think that the early residual sand body, and some think that the two shore currents meet in Qionggang, water level lift High-yield gradient flow to the sea and the formation of radiation diffusion sand bodies. Therefore, to further explore its material sources, formation mechanism, development process and evolution trend, there is a very important geological significance. In recent years, we conducted a comprehensive survey of marine geology, providing an important basis for the study of its causes.