摘要
通过提取280号钻孔岩心中有孔虫组合的信息,对岩心中浮游和底栖两大类有孔虫的分布、底栖有孔虫的组合、特殊属种的生态及复合分异度、优势度进行分析计算,重塑了本区沉积相,为雷州半岛南部地区晚第三纪以来沉积古环境演化提供了研究资料。
This study has identified and analysed in detail the foraminifera in the core of borehole No.280 (location 20°24'N, 110°17'E). Evolution of the sedimentary facies is discussed through analyses of the foraminifera in the core, such as the distribution of both the planktonic and benthic ones, the bentbic assemblages, the paleoecology of specific genera and species, the diversity indice (entrop) and the dominance. It is concluded that the sedimentary paleoenvironment in the region where the borehole was drilled has been a shallow sea or an area shallower than the neritic waters since mid-Miocene, and that water depth has changed frequently. Tims more data are provided for the research of sedimentary paleoenvironment evaluation in the area of South Leizhou peninsula.
出处
《热带海洋》
CSCD
1992年第4期63-69,T002,共8页
关键词
有孔虫
组合
沉积
古环境
第三纪
Neogene Period, foraminiferal assemblages, sedimentary paleoenvironment
