砂坝-泻湖沉积体系地层分类及其应用

Stratigraphic Types and Applications of the Barrier-lagoon System

由我国海岸砂坝-泻湖体系研究得出的四种地层类型,即海侵型,海退型,稳定型和局部海侵型,用于分析北美大西洋沿岸,黑海和澳大利亚东南海岸大陆架,以及内蒙、甘肃、宁夏古生代的同类沉积体系,证明所得出的四种基本地层类型是适用的。同时,由于构造运动、海平面变动和泥沙供应的长期变化,也发现若干新的沉积相组合和不同类型砂坝-泻湖体系转化的新途径。

Four stratigraphic types of the barrier-lagoon systems established from study of the coastal zones of China are namely transgressive type, regressive type,stationary type and locally transgressive type. They are suitable for the understanding of the conterparts of the coastal zones and continental shelves in Black Sea, Atlantic Margin of North America and SE Australia, and also for sub-divisions of some Paleozoic analogues in Gansu, Ningxia and Inner Mongolia Provinces. Some new facies assemblages and transitions from one to another type of barrier-lagoon systems have been created due to longterm tectonic subsidence, sea level fluctuation and changes of sediment input.