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基于中国第2次至第5次北极科学考察以及俄罗斯科学院远东分院太平洋海洋研究所提供的表层沉积物样品,开展粒度分析,研究表层沉积物粒度特征及其变化规律对沉积环境的指示意义。白令海与北冰洋表层沉积物类型比较丰富,沉积物主要来源于陆源碎屑,搬运方式以河流、海岸侵蚀、冰筏为主,辅以洋流。沉积物类型主要因为沉积物搬运方式及距离的远近产生差异,白令海北部及楚科奇海南部表层沉积物粒度随着离陆地距离的增大而逐渐减小,高纬地区的沉积物因冰筏沉积作用而分选较差。
Based on the second to fifth Arctic scientific expeditions from China and the samples of surface sediment from the Pacific Ocean Institute of the Far Eastern Branch of the Russian Academy of Sciences, particle size analysis was carried out to study the sedimentary grain size characteristics and their changing rules on the sedimentary environment. The surface sediments of the Bering Sea and Arctic Ocean are rich in types. The sediments are mainly derived from terrigenous debris, and are mainly transported by rivers, coastal erosion and ice rafts, supplemented by ocean currents. Sediment types are mainly due to differences in sediment transport distance and distance, surface sediment particle size in the northern Bering Sea and the southern part of the Chukchi Sea decreases with increasing distance from the land surface. Sediments in the high latitudes are affected by ice rafts Deposition and poor sorting.