摘要
根据东濮凹陷230余口井、近一万块样品的古生物资料,分析各门类生物的生态习性,推测东濮凹陷晚始新世沙河街组三段沉积期为干旱、温带至亚热带气候,属深至半深湖相的咸一半咸水沉积环境.其中介形类的特征、优势属Huabeinia属,其生态环境常远离膏盐沉积区,该属种化石标本与现代海洋、淡水湖泊中有孔虫、介形虫壳体中的微量元素分析对比,证实华北介属为半咸水生物.
This study begins with paleoecologic analysis of the fossil samples and concludes that member 3 of Shahejie formation of late Eocene in Dongpu sag wes deposited in an arid, temperate to subtropical, and saline to transitional semi-deep lacustrine environment. Also discussed in the paper is the ecologic setting of Huabeinia dominating Ostracoda In addition, analysis and comparison are undertaken on trace elements of the Huabeinia samples and of Foraminifera and Ostracoda in current marine waters and fresh-water lakes, suggesting that Huabeinia is of semisaline water origin.
出处
《中国海上油气（地质）》
1990年第3期13-18,共6页
China Offshore Oil and Gas(Geology)
