海相油气地质2017，Vol.22Issue(4)：27-34,8.DOI:10.3969/j.issn.1672-9854.2017.04.004
东非鲁伍马盆地窄陆架背景下的深水沉积体系
Deepwater Depositional System in the Background of Narrow Shelf in the Ruvuma Basin, Eastern Africa
摘要
Abstract
Based on the analysis of core observation,drilling data,seismic data and sediment provenance,the tectonic and sedimentary evolution of Ruvuma Basin are characterised in detail,and the preliminary sediment model under the condition of typical narrow shelf is proposed. The analysis result shows that the shelf is very narrow, and the upper slope is rather precipitous where the canyon and channel develop well, but lower slope is tending to flat and it is conducive to developing a wide range of submarine fan system. The deposit is mainly controlled by Ruvuma drainage, and the sediments supply is adequate triggered by uplifting and erosion in western part of Ruvuma Basin which undergone the regional uplift since Oligocene. In addition, Ruvuma drainage developed so well which coincided with the global regressive that huge sedimentary system of delta-channel-submarine fan developed with strong provenance supplying to submarine fan.关键词
陆架/深水沉积/海底扇/水道/鲁伍马盆地/东非Key words
Deep-water/Sedimentary characteristics/Submarine fan/Channel/Ruvuma Basin/Eastern Africa分类
能源科技引用本文复制引用
刘子玉,吕明,卢景美,吕栋,王颖,郭刚..东非鲁伍马盆地窄陆架背景下的深水沉积体系[J].海相油气地质,2017,22(4):27-34,8.基金项目
本文受中海油研究总院专业基础建设自立课题"被动大陆边缘背景下深水沉积体系成因研究"项目(编号:2016OT-KTZL-15)资助 （编号:2016OT-KTZL-15）
