【摘要】 <正>随着石油地质勘探工作的开展,南海北部新生代海相地层被大量钻孔揭露出来,并在其中发现丰富的浮游有孔虫化石,本文通过浮游有孔虫在地层中的分布特征和规律,建立南海北部新生代晚期浮游有孔虫分带序列及其对比.更多还原

【Abstract】 The present paper introduces the geographic distribution of the planktonic foraminifera. collected from drill holes of the northern South China Sea. Basedon the vertical change of the planktonic foraminifera in Lei-Qiong area, Ying-gehai sea area, Xisha Islands, and Basin of Zhujiang river mouth, the late Cenozoic marine layers in the northern South China Sea may be delimited into 7 planktonic foraminiferal zonations:Lower Miocene I . Globorotalia jiaoweiensis-Cassigermella chipolensis zonationMiddle Miocene II. Turborolalia siakensis zonationUpper MioceneIII. Turborolalia acostaensis-1st left coiling zonation of; Menardiform glo-borotaliasPlioceneIV. Globorotalia multicamerata-1st right coiling zouatiou of Menardiform globorotaliasV . Globorotalia altispira-2nd left coiling zonation of Menardiform globorotaliasVI. Turborotalia tosasnsis-2nd right coiling zonation of Menardiform globorotaliasQuaternaryVII. Globorotalia truncatulinoides-3rd left coiling zonation of Menardiform globorotaliasThe above zonations can be compared with the planktonic foraminiferal zonations of adjacent areas and the cosmopolitan.The sedimentory environment of the northern South China Sea in late Cenozoic is infered as bellow: The transgressions occured six times at least, the largest one presented in early Pliocene, The palaeotemperatural changes might be four, in Miocene it seems to be cooler and Pliocene was the coldest in all the late Cenozoic period.更多还原