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    南海北部狭窄陆架-断裂陆坡控制的大型深水扇体系

    张青林 张向涛 李洪博 宋朋霖 贾兆扬 曾婷 陶文芳

    张青林, 张向涛, 李洪博, 宋朋霖, 贾兆扬, 曾婷, 陶文芳, 2022. 南海北部狭窄陆架-断裂陆坡控制的大型深水扇体系. 地球科学, 47(7): 2421-2432. doi: 10.3799/dqkx.2022.157
    引用本文: 张青林, 张向涛, 李洪博, 宋朋霖, 贾兆扬, 曾婷, 陶文芳, 2022. 南海北部狭窄陆架-断裂陆坡控制的大型深水扇体系. 地球科学, 47(7): 2421-2432. doi: 10.3799/dqkx.2022.157
    Zhang Qinglin, Zhang Xiangtao, Li Hongbo, Song Penglin, Jia Zhaoyang, Zeng Ting, Tao Wenfang, 2022. Large Submarine Fan System Controlled by Narrow Continental Shelf-Faulted Continental Slope in Northern South China Sea. Earth Science, 47(7): 2421-2432. doi: 10.3799/dqkx.2022.157
    Citation: Zhang Qinglin, Zhang Xiangtao, Li Hongbo, Song Penglin, Jia Zhaoyang, Zeng Ting, Tao Wenfang, 2022. Large Submarine Fan System Controlled by Narrow Continental Shelf-Faulted Continental Slope in Northern South China Sea. Earth Science, 47(7): 2421-2432. doi: 10.3799/dqkx.2022.157

    南海北部狭窄陆架-断裂陆坡控制的大型深水扇体系

    doi: 10.3799/dqkx.2022.157
    基金项目: 

    国家重大科技专项 2016ZX05026-003

    中海油“十三五”科技重大项目 CNOOC-KJ135ZDXM37SZ01SHENHAI

    详细信息
      作者简介:

      张青林(1981-), 男, 工程师, 博士, 从事油气地质研究.ORCID: 0000-0002-8794-3591.E-mail: zhangql7@cnooc.com.cn

    • 中图分类号: P618.13

    Large Submarine Fan System Controlled by Narrow Continental Shelf-Faulted Continental Slope in Northern South China Sea

    • 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.

       

    • 图  1  珠江口盆地揭阳凹陷构造位置

      Fig.  1.  Location of Jieyang Sag in the Pearl River Mouth Basin

      图  2  珠江口盆地渐新统综合柱状图(据庞雄等,2005修改)

      Fig.  2.  Oligocene comprehensive column of the Pearl River Mouth Basin (modified from Pang et al., 2005)

      图  3  揭阳凹陷揭阳主洼珠海组三段-一段地层厚度图

      Fig.  3.  Thickness map of Member Ⅲ-Ⅰ of Zhuhai Formation in Jieyang main sub-sag, Jieyang Sag

      图  4  珠江口盆地揭阳凹陷揭阳主洼洼陷结构剖面(剖面位置见图 3

      Fig.  4.  Structural profile of Jieyang main sub-sag in Jieyang Sag, Pearl River Mouth Basin

      图  5  揭阳凹陷S1井珠海组沉积相分析

      Fig.  5.  Sedimentary facies analysis of the Zhuhai Formation in Well S1 of Jieyang Sag

      图  6  揭阳凹陷S1井珠海组ZH210砂组粒度累积概率图(a、b)和C-M图(c)

      Fig.  6.  Grain size accumulation probability curves (a, b) and C-M diagram (c) of ZH210 sandstones in the Zhuhai Formation of Jieyang Sag

      图  7  揭阳凹陷S1井珠海组成像测井动态图像

      a.叠合层理;b.块状层理;c.变形层理;d.2 932 m之上为不连续层理,之下为水平层理

      Fig.  7.  Dynamic images of imaging logging of the Zhuhai Formation in Well S1 of Jieyang Sag

      图  8  揭阳凹陷珠海组海底扇剖面特征

      a.均方根振幅属性(T63-100 m);b.主水道CH2特征;c.主水道CH1、CH3特征;d.过S1井海底扇特征

      Fig.  8.  Profile characteristics of submarine fan in the Zhuhai Formation of Jieyang Sag

      图  9  揭阳凹陷珠海组海底扇最大振幅属性

      a.珠海组一段ZH110砂组;b.珠海组二段ZH210砂组;c.珠海组三段ZH310砂组;d.珠海组四段ZH410砂组

      Fig.  9.  Maximum amplitude attribute of submarine fan in the Zhuhai Formation of Jieyang Sag

      图  10  揭阳凹陷S1井珠海组砂岩碎屑锆石U-Pb年龄分布

      Fig.  10.  U-Pb age distribution of detrital zircons from sandstones in the Zhuhai Formation of Jieyang Sag

      图  11  揭阳凹陷上渐新统均方根振幅属性(RMS)与T63深度立体构造图叠合

      Fig.  11.  Congruent map of RMS amplitude attribute of Upper Oligocene and 3D depth structural map of T63 in Jieyang Sag

      图  12  揭阳凹陷珠海组海底扇沉积模式

      Fig.  12.  Sedimentary model of submarine fan of Zhuhai Formation in Jieyang Sag

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    • 收稿日期:  2022-04-02
    • 网络出版日期:  2022-07-29
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