摘要
在苏北盆地金湖、高邮和洪泽凹陷，地处斜坡或隆起部位的下第三系源岩，程度不同地存在＂浅＂熟现象。＂浅＂熟区源岩的地球化学异常和磷灰石裂变径迹资料及古埋深恢复表明，其源岩经过渐新世以褶皱抬升为主的改造后，今埋深小于古埋深。本文探讨了苏北箕状断陷的成因机制和演化史，及其对成油地质条件的控制作用。
In the Lower Tertiary source rocks of the Jinhu, Gaoyou and Hongze sags, there exists the so-called 'shallow' maturation at the slope or uplifted positions of the sags. The geochemical anomaly, fission-track analysis and the restoration of paleo-burried depth of the source rocks in the 'shallow' matured regions indicate that the present-day buried depth is smaller than the paleo-burried depth of the source rocks after undergoing the Oligocene reworking dominated by folding and uplifting. This paper discusses the origin and evolution of the Subei (north Jiangsu) half-graben fault depression and its control over the geological conditions for oil generation.
出处
《石油勘探与开发》
EI
CAS
CSCD
北大核心
1996年第4期6-10,共5页
Petroleum Exploration and Development
关键词
苏北盆地
生油层
埋藏史
断陷
构造演化
Subei basin, Source bed, Burial history, Fault depression, Tectonic evolution
