珠江口盆地西部古近系与新近系生物地层界线研究  

BIOSTRATIGRAPHIC RESEARCH ON THE PALEOGENE-NEOGENE BOUNDARY IN THE WESTERN PEARL RIVER MOUTH BASIN

作　　者：李珊珊 谢金有 刘新宇 何卫军 祝幼华[2] 

机构地区：[1]中海石油(中国)有限公司湛江分公司,湛江524057 [2]中国科学院南京地质古生物研究所,南京210008

出　　处：《微体古生物学报》2010年第3期221-230,共10页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金(40372005)资助

摘　　要：古近系与新近系的界线在浮游生物地层分带中的具体位置长期存在争议,笔者依据珠江口盆地西部50余口钻井微体古生物资料中的浮游有孔虫和钙质超微化石记录,辅以沟鞭藻和主要孢粉事件对研究区古近系与新近系的生物地层界线展开研究,探讨了浮游有孔虫Globigerina ciperoensis,Globoquadrina dehiscens,Globigeri-noidestrilobus以及钙质超微浮游生物Sphenolithus ciperoensis,Zygrhablithus bijugatus和Reticulofenestra bisec-ta等标志性化石的地层意义,并重新厘定了珠江口盆地西部古近系与新近系的生物地层界线标准。The concrete position of the Paleogene-Neogene boundary in the plankton zonation has given rise to much controversy for a long time. In this paper, the research of the Paleogene-Neogene biostratigraphic boundary is carried out mainly by microfossil data of planktonic foraminifera, calcareous nannoplankton, dinoflagellate and sporo-pollen from more than 50 wells in the western Pearl River Mouth basin. Based on the above-mentioned analysis, the strati- graphic significance of the index fossils are discussed including planktonic foraminifera Globigerina ciperoensis,Globi- gerinoides trilobus , Globoquadrina dehiscens , and calcareous nannoplankton Sphenolithus ciperoensis , Z ygrhablithus bijugatus and Reticulofenestra bisecta. Therefore, the standard of the Paleogene Neogene biostratigraphic boundary is redefined in this area.

关 键 词：浮游有孔虫 钙质超微 生物地层 古近系-新近系界线 珠江口盆地 

分 类 号：Q911[天文地球—古生物学与地层学]