摘要
花沟地区是东营凹陷西南部一个典型的箕状洼陷 ,它由高青断裂下降盘的陡坡带、中央深洼带和位于鲁西隆起之上的缓坡带组成。对该地区单断湖盆研究后发现 ,在断陷湖盆稳定扩张期陡坡带主要发育水下扇沉积体系 ,该体系由水下河道、河道朵叶复合体、河口裙边扇、滑塌裙边扇、浊积扇和深湖泥质披盖等 6个相单元组成。高青断裂的活动强度以及相邻凸起之上的碎屑供给控制了该水下扇的发育。缓坡带上发育的扇三角洲沉积体系主要由分支河道、决口河道决口扇复合体、浊积扇和浅湖滩坝相等 4个相单元组成 。
The Huagou sag is a typical case in the rift basin of the Bohai Bay basin in eastern China. It consists of a steep slope on extensional discordant faults, a depocenter and a gentle slope over a uplift adjacent to the basin. Fluvial subaqueous fan-turbidite depositional systems are located in the steep slope of the Huagou sag. The steep slope systems are comprised of six basic facies blocks, including ① channel fills, ② channel-lobe complexes, ③ fluidized apron, ④ slump debris\|flow lobes and tongues, ⑤ muddy turbidite fills and sheets, and ⑥ muddy lacustrine drapes and fills. Activity of the discordant faults and supply of clastic materials from the upleaps controlled distribution of the six facies on the steep slope. The delta\|fan depositional system developed on the gentle slope of the Huagou sag consists of branch channel fills, channel debris flow complex, sandy sheets and shallow lake facies. This depositional system was controlled by lake level and supplies of clastic materials from adjacent uplifts.
出处
《石油大学学报（自然科学版）》
CSCD
2000年第1期30-33,共4页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
陡坡带
缓坡带
沉积体系
湖盆
地震勘探
Dongying depression
Huagou sag
steep slope
subaqueous-fan gentle slope
delta-fan
depositional system
identification
