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本文根据七个钻孔中重矿物参数在垂直方向上的变化,将东海陆架晚更新世—全新世四万年以来的地层划分为4—6层。其中,大部分钻孔早、中、晚全新世地层发育完全,少数钻孔的全新世地层缺失。通常各矿物参数变化明显转折的层位就是地层分层界线之所在,并与岩性、古生物、~(14)C年代地层学的结果大体一致。文章还探讨了重矿物组合分区对横向地层对比、沉积环境、碎屑沉积特征和物质来源的意义。这些结论与中美联合调查所获得的东海陆架河口现代物质通量和扩散范围的沉积动力学状况基本吻合。
Based on the vertical variation of heavy minerals in the seven boreholes, the strata of the East Pleistocene-Pleistocene-Paleocene during 40,000 years are divided into 4-6 layers. Among them, most of the boreholes developed well in early, middle and late Holocene strata, and a small number of boreholes were missing in the Holocene. Generally, the change of the parameters of each mineral is obviously the layer where stratigraphic stratigraphic stratification stratified. It is generally consistent with the results of lithology, paleontology and stratigraphy of ~ (14) C era. The article also explored the significance of the combination of heavy mineral assemblages to horizontal stratigraphic correlation, sedimentary environment, clastic sedimentary characteristics and material sources. These conclusions are in good agreement with the sedimentation kinetics of the modern material flux and diffusion range of the East China Sea shelf estuary obtained by the Sino-U.S. Joint Survey.