东海西湖凹陷平北地区表层沉积物特征及其成因初探

THE SURFACIAL SEDIMENT CHARACTERISTICS AND ITS PRELIMINARY EXPLANATIONS OF THE FORMATION OF THE EAST CHINA SEA WEST LAKE DEPRESSION PINGBEI DISTRICT

对研究区域的 370个站位 ,10 84个样品进行了粒度分析 ,对其中的部分样品进行了重矿物、古生物的分析和鉴定 ,发现东海西湖凹陷平北地区表层改造砂的特征与一般的规律有较大的差别 。

The East China Sea West Lake Depression Pingbei district locates in the outer shelf of the East China Sea. The depth ranges from 60 m to 90 m below sea level in general. This district belongs to the low energy environment under wave base. In the article, by analysis of grain, heavey mineral and paleoorgamisms, the authors have found that the sediment characteristics in the district are different from the general regularity. Preliminary explanations have been given according to many documents.