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融合多波束测深等多种数据资料,对东海陆架线状沙脊进行了识别、分区和分类研究,建立了沙脊脊线分布图谱.东海陆架沙脊走向呈正态分布,155°方位角是正态分布的中心点,125°,130°,140°和180°为沙脊走向峰值点.沙脊空间分布表现为中间密集、南北两端稀疏、向东分散分叉、向西密集交汇的特征.根据沙脊走向和空间上的组合关系将沙脊群划分为7个分区,识别并划分了类河口湾沙脊和开阔陆架沙脊.冰期-间冰期旋回所导致的海平面大幅升降是陆架沙脊广泛发育的主因,古长江输送到陆架的丰富沉积物为沙脊形成提供了物源,海底负地形对沙脊走向起到约束作用.基于沙脊空间分布特征、海平面变化和古潮流场的研究结果,将东海陆架沙脊演化分为4大阶段,分别对应14.5kaBP前、12～14,11.5～9.5和9kaBP后.
Fusion multibeam sounding and other data to study the recognition, classification and classification of the linear sand ridge on the continental shelf of the East China Sea, and establish the ridgeline distribution map of the sand ridge.The normal distribution of the ridge of the East China Sea shelf is 155 ° azimuth Is the normal distribution of the central point, 125 °, 130 °, 140 ° and 180 ° for the ridge to the peak point.S sand ridge spatial distribution of intensive, north and south at both ends of the sparse, divergent bifurcation eastward, converge to the west The sand ridges are divided into seven zones according to the combination of sand ridges and space, and the estuarine ridges and open ridges of the estuary are identified and divided. The sea level caused by the glacial-interglacial cycles is greatly increased and decreased The abundant sediments transported to the shelf by the ancient Yangtze River provide the source for the formation of sand ridges and the negative sea topography plays a restraining role in the movement of the sand ridges.Based on the spatial distribution of sand ridges, The paleoclimate flow field results show that the continental shelf evolution of the East China Sea shelf is divided into four stages, corresponding to 14.5kaBP before, 12 to 14, 11.5 to 9.5 and 9kaBP respectively.