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本文阐述了莱州湾南岸晚更新世和全新世地层的地质特征、从山前冲洪积平原淡水到海积平原沉积海水的水化学特征，以及沉积海水的形成及其演化过程。研究表明，莱州湾南岸晚更新世和全新世地层具有３个赋存着沉积海水的海相沉积层，沉积海水与海水的化学成分相似，与冲洪积平原淡水化学成分不同．在古海水浓缩过程中，存在着方解石和石膏的沉淀以及钠长石和钙长石的蚀变。在沉积海水入侵淡水的混合带，存在着Ｎａ＋与Ｃａ２＋和Ｍｇ２＋之间的离子交换。沉积海水的形成是晚更新世后期三次海侵期间的海水，经过蒸发浓缩、下渗富集和埋藏变质等作用的结果。
This paper describes the late Pleistocene and Holocene geological features on the southern bank of the Laizhou Bay. The hydrochemical characteristics of sedimentary seawater from freshwater in the piedmont alluvial plain to the sedimentary plain, and the formation and evolution of sedimentary seawater. The study shows that there are three marine sedimentary layers in the Late Pleistocene and Holocene strata on the south bank of Laizhou Bay with sedimentary seawater. The chemical compositions of sedimentary seawater and seawater are similar, which are different from those of the alluvial plain. During ancient seawater concentration, there are precipitations of calcite and gypsum and alteration of albite and anorthite. There is ion exchange between Na + and Ca2 + and Mg2 + in the mixing zone where freshwater is deposited by seawater. The formation of sedimentary seawater is the result of three sea transgression during the late Pleistocene, after evaporation and concentration, infiltration and enrichment and burial metamorphism.