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砂坝和泻湖通常构成一个统一的沉积体系,它们在现代海岸带分布相当普遍.对它们的研究必将对同类古代沉积有一定对比意义.我国东部沿海地带,砂坝——泻湖沉积体系有多种类型,处在不同的发育阶段,渤海西岸七里海砂坝——泻湖便是其中之一.1977年以来,我们在对滦河冲积扇——三角洲地区进行调查的同时,也对七里海砂坝——泻湖进行了调查和研究.本文将根据近年来野外调查和室内分析资料和成果,对七里砂坝——泻湖体系的沉积特征和发育过程,作一初步讨论.
Sandbars and lagoons usually form a unified sedimentary system and their distribution in the modern coastal zone is fairly common, so the research on them will surely be of some comparative significance to similar ancient sediments. There are many sedimentary systems of sand bar and lagoon in the eastern coastal belt of China Species, at different developmental stages, one of them is the Qilihai sand dam-lagoon in the west coast of the Bohai Sea. Since 1977, when we investigated the Luanhe alluvial fan-delta region, we also investigated the Qilihai sand Dam-lagoon was investigated and studied.This paper will make a preliminary discussion on the sedimentary characteristics and development process of Qili dam-lagoon system based on the field investigation and indoor analysis data and achievements in recent years.