摘要
利用岩心观察、粒度分析、薄片研究等方法 ,研究了惠民凹陷中央隆起带西部沙河街组三段上部风暴沉积的主要特征。研究结果表明 ,本区风暴沉积具有①低成分成熟度、高结构成熟度的岩性特征 ;②重力流特征的变形构造 ;③反映风暴浪作用的层理及层面构造 ;④与风浪作用相关的生物成因构造及典型的“似鲍马序列”。本区风暴岩沉积物源来自于湖盆的三角洲及滩坝沉积。按它们之间的相对位置可以划分出两种风暴岩类型 ,即滩前较深水风暴岩和滩后浅水风暴岩。
On the basis of core observation, grain analysis and thin section studies, the storm deposits in the upper Sha-3 member of Eogene system in western central uplift belt of Huimin depression are studied. The storm deposits are characterized by lithologic features of low compositional maturity and high textural maturity, pene\|contemporaneous deformation structures resulted from storm wave, biogenetic sedimentary structures related to storm activity and typical Bouma\|like sequences. There are two provenances for storm deposits in this area, in which one comes from delta, and the other comes from beach and bar. According to their relative position and features, the tempestites can be divided into two types of fore beach deep water tempestite and back beach shallow water tempestite. A model of storm sedimentary facies for this area is established.
出处
《石油大学学报（自然科学版）》
CSCD
2000年第1期26-29,共4页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
惠民凹陷
下第三系
风暴沉积
沉积相
模式
Huimin depression
Lower Tertiary
Shahejie group
tempestite
depositional feature
sedimentary facies model
