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本文分析测定了福建厦门大嶝海域三个沉积物柱样中的孢粉、硅藻、有孔虫和14C年代,对其微体古生物组合特征、沉积环境和地层年代进行了初步的探讨。划分出两个孢粉带,即下部的栎属-蕨类带和上部的松属-蕨类-禾本科带,表明自下而上气候由热湿变为暖干。硅藻以柱状小环藻-具槽直链藻组合为代表,有孔虫组合则以毕克卷转虫占优势,表明为近岸浅水环境,但柱样上下有些差异。研究结果表明,所研究的柱样沉积物下部形成于中全新世晚期,上部属于晚全新世。
In this paper, we analyzed and determined the sporopollen, diatom, foraminifera and 14C age in three sediment samples in the Dabie Sea of Xiamen, Fujian Province. The characteristics of microflora assemblage, sedimentary environment and formation age were discussed. Two sporo-pollen belts, the lower Quercus fern belt and the upper Pinus-fern-Poaceae zone, were identified, indicating that the bottom-up climate changes from warm and humid to warm. Diatoms are represented by the combination of Cyclotella cylindrica - Stenotrophomonas trenches. The foraminifera assemblage is dominated by the Beauveria bassiana, indicating a nearshore shallow water environment, but there are some differences between the upper and lower columns. The results show that the lower part of the studied pillar-like sediments formed in the late Mid-Holocene and the upper part belongs to the Late Holocene.