摘要
河套盆地第三系及其生物群傅智雁，袁效奇，耿国仓（长庆石油勘探局勘探开发研究院，甘肃庆阳，７４５１０１）河套盆地位于内蒙古自治区中部的黄河河套地区，第三系发育较全。在进行石油地质综合勘探期间，随钻分析抱粉、介形类和轮藻岩样共计１３００余块，获得较丰富的...
The Hetao Basin lies at the bend of the Huanghe River area in central Net Mongol (Inner Mongolia) Autonomous Region, where the Tertiary strata are completely developed. During our comprehensive exploration of petroleum geology in this basin, we had analysed sporo-pollen, ostracods and charophytes totaling over 1300 samples. Based on vertical and horizontal distribution, the sporo-pollen may be divided into five assemblages. Foraminifers were first found in the Miocene.Dn the basis of newly found ostracods and sporo-pollen, the writers revise the geologic age of the Wulat Formation from the originally dated Eocene to Late Paleocene-Early Eocene.
出处
《地层学杂志》
CSCD
北大核心
1994年第1期24-29,共6页
Journal of Stratigraphy
基金
中国油气区第三系研究阶段成果
