东海全新世沉积强度分区

Holocene Depositional Strength Zoning in the East China Sea

主要按年代地层学 1 0 .3ka B.P.～ 1 2 ka B.P.,参考岩性和生物地层学方法 ,统一和确认了东海全新统底界。综合分析东海 52个钻孔和柱状岩芯资料 ,进行了全新世沉积强度分区 ,按沉积速率高低分为现代长江水下三角洲沉积区、浙闽近岸浅海沉积区、陆架东北冷涡沉积区、陆坡与冲绳海槽沉积区以及陆架残留沉积区。并对各区的沉积机理作了分析解释。

Based on the methods of chronostratigraphy(10.3～12kaB.P.), lithostratigraphy and biostratigraphy, the bottom boundary of the Holocene, are united and identified. After comprehensively analyzing the data of 52 drilling holes and cores, the depositional strength in the East China Sea is zoned. According to the depositional strength this area can be divided into the following five areas:the modern Changjiang submarine delta deposition area, the near shore and offshore deposition area adjacent to Zhejiang and Fujian, the cold eddy deposition area in the northeast of the continental shelf, the Okinawa Trough and continental slope deposition area ,and the relict deposition area. the depositional mechanisms are also interpreted for each area.