摘要
深水水道是深水区常见的地貌单元,既是深水重力流沉积物的搬运通道,又是其主要沉积场所。对重力流水道沉积研究已有60余年的历史,成果极为丰富。本文简要回顾了深水水道沉积研究历程及最新研究成果,总结了主要水道类型沉积特征及形成机理。重力流水道可分为复合型水道、垂向加积型水道、迁移型水道和分支小水道。复合型水道形成与重力流演化过程密切相关,其内部发育轴部沉积、碎屑流/滑塌沉积、水道—堤岸沉积体系及迁移型水道。弯曲型迁移水道多为重力流自生环流而成,顺直型迁移水道为等深流与重力流共同作用而成。重力流水道研究的发展方向主要有3个方面,即:(1)积极开展多手段和方法综合研究;(2)深入系统对比研究其形成机制及主控因素;(3)加强储集层分布规律研究。
Deepwater channel is usually geomorphology in deepwater zone,which is not only transport way of deepwater gravity flow sediment,but also is mainly sedimentary place.There have been abundant fruits on gravity flow channel for more than 60 years.The research process and latest achievement are reviewed,characteristic and mechanism of deepwater channel have been summarized in this paper.The gravity flow channel could be divided into complex channel,vertical aggradation channel,migrational channel and small bifurcated channels.The process of complex channel is closely related to evolution of gravity flow.Channel axial deposits,debris flow/slump deposit,channel-levee system and migrational channel develop in complex channel.Sinuous migrational channel secondary circulation of gravity flow was formed.Strait migrational channel is interaction between gravity flow and contour current.The direction of work on gravity flow channel in the future always results from were proposed as follows:(1)more way and method comprehensive research;(2)systematic comparative study on mechanism and mainly controlling factors;(3)reinforce to work on the reservoir distribution.
作者
李华
何幼斌
Li Hua;He You-Bin(School of Geosciences,Yangtze University,Wuhan 430100,China;Research Center of Sedimentary Basin,Yangtze University,Wuhan 430100,China)
出处
《古地理学报》
CAS
CSCD
北大核心
2020年第1期161-174,共14页
Journal of Palaeogeography：Chinese Edition
基金
“十三五”国家科技重大专项(编号:2017ZX05032-002-003)
国家自然基金项目(编号:41472096、41502101)
长江青年基金(编号:2015cqn26)
湖北省教育厅科学研究计划中青年人才项目(编号:Q20171308)
地质资源与地质工程一流学科开放基金项目联合资助~~
关键词
深水水道
复合型水道
迁移型水道
重力流
deepwater channel
complex channel
migrational channel
gravity flow
