摘要
通过对地层特征及其所含的孢粉、微古及测年资料的综合分析,将海坛岛的第四系划分为晚更新世期和全新世期共10种地层。它们分别代表了晚更新世以来海坛岛沉积相的发展顺序,为残积相→海陆过渡相、风积相、冲洪积相→浅海相→滨海相→海陆过渡相→滨岸相→风积相、冲洪积相。
Based on the comprehensive analysis of Quaternary chronostratigraphy, sporopollen and foraminiferal assebleges of Haitan Island, this paper dicusses the division of Quaternary system, the evolution of sedimentary facies, sea level and climate changes in Haitan Island since Late Pleistocene.
The Quaternary strata of Haitan Island can be divided into the kinds which belong to Pleistocene and Holocene periods. The Quaternary system from bottom to top presents the sedimentary rhythm variations from Late Pleistocen to now i. e. medium-coarse sand, sand-silt-clay, sand-silt-clay with gravels→silty clay, clayey silt→coarse-medium sand→clay, clayey silt→medium-coarse sand→medium-coarse sand, sand-silt-clay with pebbles. It stands for the evolution sequences of paleoenviron ment i. e. paralic f acies, eolian f acies, alluvial-pluvial f acies→neritic facies→littoral facies→paralic facies→shore facies→eolian facies, alluvial-pluvial f acies.
Under the influences of the global climate-sea level changes and regional crust movement, there have been three transgression-regression cycles since Late Pleistocene in Haitan Island. The relative sea level seemed the highest in Early Holocene. The paleoclimate relevantly represents the evolution sequences i. e. hot→warm and moist→warm and a little dry→warm and dry→warm and a little moist→cool and dry. It also contains the second-class climate oscilations.
出处
《海洋通报》
CAS
CSCD
北大核心
1996年第5期53-60,共8页
Marine Science Bulletin
基金
福建省自然科学基金(项目号D93007)
南京大学海岸与海岛开发国家试点实验室(成果号SCIEL 21195143)
