东海陆架西湖凹陷宝石一井深层微体化石及地层意义  

MICROFOSSILS AND CHRONOSTRATIGRAPHY OF THE DEEP BEDS IN THE WELL BAOSHI 1# FROM XIHU SAG, THE EAST CHINA SEA

作　　者：顾惠荣[1] 陈琳琳 

机构地区：[1]中国地质大学,武汉430074 [2]上海海洋石油局规划设计研究院,上海200120

出　　处：《古生物学报》2003年第4期620-623,共4页Acta Palaeontologica Sinica

摘　　要：简要报道东海陆架浙东坳陷西湖凹陷之宝石一井T4°地震反射层以下深部地层 (井深 344 7m以下 )的古生物资料 ,并探讨其年代地层属性。经初步分析研究 ,这深部层位含有有孔虫、钙质超微化石、沟鞭藻和海相介形类等微体化石 ,以及见有尚不能判断是否为原位的孢粉化石。根据微体古生物的地质分布以及其它钻井深层所含微体古生物比较 ,认为宝石一井T4°反射层以下地层为西湖凹陷揭示的一套新的地层 。This paper mainly reports the microfossils including coccoliths, foraminifers, dinoflagellates, ostracods and palynomorphs from the deep beds (interval 3 447? ? 806 m ) exposed in the well Baoshi 1# of Xihu Sag and discusses its chronostratigraphy. According to the geological distribution of these microfossils and a comparison with those fossils from formerly drilled wells in Xihu Sag, the authors hold that the intervel covering these deep beds of the well Baoshi 1# is a set of newly found strata and belongs to Paleocene.

关 键 词：微体古生物 地层年代 深层 宝石一井 西湖凹陷 东海 

分 类 号：Q913[天文地球—古生物学与地层学]