【摘要】 以南海北部大陆架海域莺歌海-琼东南盆地Ya8-2-1、Ya8-1-1、Ya13-1-4及LD30-1-1A井为重点,进行定量的多门类微体古生物群综合分析和生物地层学研究。莺-琼盆地第三系有丰富的微体古生物化石,有孔虫化石尤为丰富。详细研究了有孔虫、介形虫、钙质超微、孢粉和沟鞭藻等生物群的特征及其纵、横向上的分布。依据浮游有孔虫、钙质超微化石等,对盆地第三系识别出14个浮游有孔虫界面和1个钙质超微化石界面,对化石带的划分进行了讨论。经与Berggren等所制定的绝对年龄值的对比,作出了莺-琼盆地的年代地层表。最后对莺-琼盆地第三系各组(崖城组、陵水组、三亚组、梅山组和莺歌海-黄流组)的时代进行了讨论。更多还原

【Abstract】 A quantitative and multiple analysis is presented from wells Ya8-2-1,YaS-1-1, Yal3-l-4 and LD30-1-lA in Ying-Qiong Basin. Large groups of rnicrofossils are yielded from Tertiary,in which foraminifera are most abundant. This paper deals with the occurrence and distribution of different biotas like foraminifera. ostra-cods,nannofossils,sporopollens and dinoflagellates. Fourteen planktonic foraminiferal zones and one nanno-fospil interface have been recognized from the basin. The absolute ages of each zone are determined after the chronostratigraphy of Berggren et al. (1985). A detailed stratigraphic chart of the basin is plotted out. The ages of Yacheng,Lingshui,Sanya,Meishan and Yinggehai-Huangliu Formations are discussed.更多还原