莺歌海盆地DF1-1-11井有孔虫生物地层与沉积环境研究

FORAMINIFERAL BIOSTRATIGRAPHY AND SEDIMENTARY ENVIRONMENT RECONSTRUCTION BASED ON PALEONTOLOGICAL DATA FROM BORE HOLE DF1-1-11,YINGGEHAI BASIN

结合ODP184航次及2008年“国际地层表”等研究成果，对莺歌海盆地基准井DF1-1-11井岩屑地层（630-3508m）的有孔虫定量分析资料进行研究，建立可靠的生物地层及年代地层格架，并通过对钻井中有孔虫丰度、分异度、浮游比例、组合特征及古水深估算分析，讨论了DF1-1-11井中中新世以来的沉积环境演化。研究结果对建立整个莺歌海盆地及邻区生物地层和年代地层格架具重要的借鉴意义。

Detailed analysis of planktonic foraminifers was performed at bore hole DF1-1-11, Yinggehai Basin. A comparison with the stratigraphic sequence from ODP Leg 184 and with the international standard chronostratigraphic timescale published in 2008, the planktonic foraminiferal biostratigraphy and chronostratigraphy of DF1-1-11 were set up. Quantitative analysis of foraminifers provides important information about environmental variations at the bore hole. The evolution of sedimentary environments at the bore hole is also discussed in detail based on the statistics of foraminiferal abundance, diversity, percentage of planktonic foraminiferal, and assemblage characteristics. This study will be beneficial for future researches on the biostratigraphy and chronostratigraphy of the Yinggehai Basin and its adjacent areas.