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本文系统地研究了闽江河口琅岐岛钻孔揭示的第四纪地层。根据孢粉、微古、硅藻和~(14)C测年等资料分析了沉积物形成时的气候波动、沉积相和沉积物年代,将闽江河口第四纪地层划分为上更新统上段(厚>15米)和全新统(厚49.80米)。全新统又可分为下全新统下段和上段、中全新统和上全新统。气候演化为:冷干→温暖略干→温暖湿润→炎热潮湿→温暖略干。沉积相演化为:冲积相、冲洪积相、湖沼相→冲积相、湖沼相→河口相、湖沼相→海湾相→河口相。
This paper systematically studied the Quaternary stratigraphy revealed by the drilling of the Langqi Island in the Min River estuary. Based on the data of sporopollen, Weigu, diatom and ~ (14) C dating, we analyzed the climatic fluctuation, sedimentary facies and sediment age in the sediment formation. The Quaternary strata in the Minjiang estuary were divided into the Upper Pleistocene (15 m thick) and the Holocene (49.80 m thick). The Holocene can be divided into the lower and upper reaches of the Lower Holocene, the Middle Holocene and the Holocene. Climate evolution as: cold dry → warm slightly dry → warm and humid → hot and humid → warm slightly dry. Sedimentary facies evolve into: alluvial facies, alluvial accumulation facies, lacustrine facies → alluvial facies, lacustrine facies → estuarine facies, lacustrine facies → gulf facies → estuarine facies.