摘要
通过汇总全球几个主要的优质海相烃源岩的古海洋-古气候特征以及相应的沉积环境,从有机质的生产、来源和保存条件3个维度将海相烃源岩发育的古海洋模式概括为:①三角洲-陆源海相模式,如西非陆缘盆地发育的烃源岩;②强蒸发-上升流模式,如墨西哥湾中生界烃源岩;③滞留静海-湿润气候模式,如北海盆地钦莫里阶烃源岩。结合现有资料分析认为,南海北部深水区恩平-珠海组(始新统—渐新统)处于半封闭局限海环境,普遍发育三角洲沉积体系,陆源有机质供应充足,气候条件适宜,具备发育优质海相烃源岩的古海洋条件。
Three patterns of marine hydrocarbon source rocks are established based on previous researches on several prominent marine source rocks around the world.The organic geochemistry feature,paleoenvironmental and paleoceanic conditions are collected to constrain the factors of productivity,sources and preservations of the organic matter.The patterns are as fellows:①delta-terrestrial sourced marine facies pattern;②evaporated-ocean upwelling pattern;③restricted sea-humid climate-pattern.Previous researches have shown that the Enping-Zhuhai formation(Eocene-Oligocene)in the deepwater area of the northern South China Sea was formed under a restricted Marine environment,with developed delta sedimentary system,sufficient supply of terrestrial organic matter.According to this reviews,we suggest that there is a great potential for exploration of the marine hydrocarbon source rocks in the deepwater area in the northern South China Sea.
作者
马瑞罡
刘传联
MA Ruigang;LIU Chuanlian(State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,China)
出处
《海洋地质前沿》
CSCD
2020年第8期11-18,共8页
Marine Geology Frontiers
基金
国家重大科技专项(2016ZX05026007-03)
国家自然科学基金项目(41876046,41930536)。
关键词
海相烃源岩
古海洋模式
海洋生产力
缺氧环境
南海北部
marine source rocks
patterns of formation
ocean productivity
anti-oxide
Northern South China Sea
