【摘要】 通过对珠江口盆地白云凹陷陆坡区10.5Ma以来的地震相分析,共识别出席状平行亚平行地震相、透镜状前积地震相、深切河谷地震相、帚状地震相和杂乱地震相,不同的地震相分别代表不同的沉积体系类型。综合所识别的地震相类型,分析了陆架边缘下切谷、浊积扇和陆架边缘三角洲3种主要的沉积体系及其配置关系。物源供给是影响陆坡区沉积体系发育的最重要因素,是沉积体系发育的物质基础,海平面变化和构造运动为沉积体系发育提供了可容纳空间,3种影响因素共同影响了陆坡区沉积体系的发育。更多还原

【Abstract】 Five seismic facies were identified including parallel or sub-parallel seismic facies,lenticular foreset seismic facies,incised-valley seismic facies,brush-shaped seismic facies and chaotic seismic facies through the seismic facies analysis of Baiyun depression in the Pearl River Mouth basin since 10.5 Ma and each of them standed for different kinds of depositional systems.Ulteriorly the chief depositional systems and their setup relation were analysed including shelf-margin incised-valley,turbidite fans and shelf-margin delta.At last we think the main influential factors are sediment supply,sea level change and tectonic movement.Sediment supply was the most important factor to influence depositional system upgrowth,which was the substance base.Sea level change and tectonic movement provided accommodation space for depositional system upgrowth.更多还原