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东海是西北太平洋边缘海之一,海域十分广阔,面积达770000平方公里.除冲绳海槽水下地形比较复杂外,陆架区都较平缓,呈阶梯状由西北向东南缓慢下降(图1).沿岸有长江等河流携带丰富的陆源物质入海(表1),形成东海陆架现代沉积是陆源碎屑物质组成的基本特征.冲绳海槽现代沉积除东面槽坡不受我国陆源碎屑影响外,西面槽坡和槽盆无论从沉积物的矿物组合特征和生物遗骸来看,仍明显受到我国陆源碎屑的影响.东海生物资源异常丰富,是我国重要的渔业生产基地.近年来随着海底石油资源的发现和开发,东海必将进一步引起世界各国的注意.
The East China Sea is one of the northwestern margin of the Pacific Ocean, the sea is very wide, an area of 770,000 square kilometers .In addition to the Okinawa Trough underwater topography is more complex, the shelf area are more gentle, stepped down slowly decline from northwest to southeast (Figure 1). Modern coastal sediments in the East China Sea are the basic features of the terrigenous detrital material composition. The modern sedimentation of the Okinawa Trough in addition to the terrestrial trough slope is not affected by terrestrial debris, In terms of mineral assemblages and biological remains of the sediments, the western slope and trough are obviously affected by terrestrial debris in China, and are extremely rich in biological resources in the East China Sea, which is an important fishery production base in China. The discovery and development of oil resources, the East China Sea will further arouse the attention of all countries in the world.