摘要:
前言束鹿凹陷位于河北省东南部。西去200km,太行山的支脉延伸,东去200km达渤海湾。近年来华北石油勘探设计研究院、华北石油第四勘探公司和成都地质学院等单位都先后在这里进行了大量的工作。他们认为束鹿凹陷主要是从始新世开始沉积,在沉积过程中这里没有发生剧烈构造活动,因此是一个断层不发育而又少圈闭的单断型凹陷。总面积为659km~2,基底最深达7,500m,地层为下第三系。在前人工作的基础上,本文试图运用孢子花粉、藻类和疑源类等微古植物群资料来探讨其地质时代及沉积环境等。作者从八三年初开始对本凹陷进行工作,重点对晋45井系统采样42块次(岩屑40块、岩心2块),另外还有晋52井、晋56井、晋33井的岩心样品共27块。
Abstract:
This paper deals with the micropaleobotanic florae of the Lower Tertiary depres- sion in Shulu, Hebei province, accompanying the study of the Tertiary stratigraphy sedimentary facies and prospective oil reserves of the study area. The major effort has been made to reveal that the micropaIeobotanic florae are characterized by the prodominance of primitive Angiospermophyta, over-abundant jute pollen, algae sad Acritarch. The author has put forward her own views whereby the profiles of the depression may be divided into four stages-Shahejie Third Section Shahe- jie Second Section, Shahejie First Section and Dongying Formation. The author has also discussed the paleogeographic environments, paleobotanic landscape.
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