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- W4312729811 abstract "摘要: 南海北部狭窄陆架-断裂陆坡控制的深水沉积体系研究程度极低.以“源-渠-汇”耦合思想为指导,基于岩石学特征、测井相、地震相分析,刻画了揭阳凹陷珠海组深水扇砂体的垂向叠置和横向迁移特征,并将其形成演化划分为珠海组四段初始形成期、珠海组三段-二段发展扩大期、珠海组一段萎缩消亡期.揭阳凹陷珠海组大型盆底扇的形成受控于易剥蚀的中生界物源、多期的相对海平面快速下降、狭窄陆架-断裂陆坡的有利地貌这3个关键因素的耦合作用;在区域三级相对海平面快速下降的背景下,揭阳凹陷北侧东沙隆起富砂的下白垩统快速剥蚀,沉积物直接沿狭窄陆架区的侵蚀下切谷或小型陆架边缘三角洲的水下分流河道搬运,顺断裂坡折带或构造转换带调节,以重力流形式经峡谷水道继续搬运至下陆坡盆地形成大型海底扇. 关键词: 狭窄陆架 / 断裂陆坡 / 深水扇 / 沉积特征 / 珠海组 / 南海北部 / 石油地质学" @default.
- W4312729811 created "2023-01-05" @default.
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- W4312729811 date "2022-01-01" @default.
- W4312729811 modified "2023-09-25" @default.
- W4312729811 title "南海北部狭窄陆架-断裂陆坡控制的大型深水扇体系" @default.
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- W4312729811 doi "https://doi.org/10.3799/dqkx.2022.157" @default.
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