九龙江河口平原晚第四纪硅藻及海平面变化初探

基金项目: 福建省自然科学基金资助项目:台湾海峡西岸晚第四纪陆海相互作用研究(编号:D95008).实验室成果编号:SCIEL21197130

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

1.
State Pilot Laboratory of Coast and Island Exploitation, Nanjing University Nanjing 210093
2.
Third Institute of Oceanographu, State Oceanic Administration, Xiamen 361005

摘要: 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.
- 晚第四纪 /
- 硅藻 /
- 海平面变化 /
- 九龙江 /
- 河口平原
Abstract: The diatom assemblages discerned in Core ZK5 can be grouped under 4 units,and can be subdivided into 24 zones.The 4 units were deposited in the Late Wiirm Glacial,Early Holocene,Middle Holocene and Late Holocene,respectively.Comprehensive analysis of microbial assemblages,lithological characteristics and age determinations of ZK5 and some other boreholes,shows that during the Late Wurm Glacial the sea level of the study area rose and fell frequently,but had principally been in the environments of estuary-bay.mainly resulted from tectonic subduction.Additionally,in this period,3 low sea levels occurred,resulting in the sedimentary environment of river.As for Holocene,sea water intruded massively and the sea level over the transgression maximum had been 5-10 m higher than that of present.
- Late Quaternary /
- diatom /
- Sea level change /
- estuarine plain /
- the fiulong River