Late Quaternary diatom and sea level changes in estuarine plain of the Jiulong River

Four units and twenty-four zones of diatom have been discerned in the Borehole ZK5 in the estuarine plain of the Jiulong River, Fujian Province. Comprehensive analysis of these, together with microbiological assemblages and age determinations in some other boreholes, shows that during the Late Wurm Glacial, sea level of the study area rose and fell frequently, but had principally been in the environments of estuary-bay. This mainly resulted from the tectonic subouction. In this period 3 low sea levels occurred. at 18, 16 and 12 kaBP respectively. During Holocene, sea weter intruded massively and the sea level over the transgnaion maximum had been 5-10 m higher than that of the present.

九龙江河口平原晚第四纪硅藻及海平面变化初探

将福建九龙江河口平原ＺＫ５孔剖面细分为４个硅藻段、２４个硅藻带，并结合其他钻孔的微体生物组合特权和年代测定结果等进行分析。研究表明，晚玉木冰期本区海面升降频繁，但大多处于河口港湾环境，这主要是构造沉降所造成的；其间出现３次低海面，均为河流沉积环境。全新世冰后期海水大规模入侵，鼎盛期本区相对海面高出现代海面达５－１０ｍ。