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南海南部北康盆地晚中新世以来深水沉积单元时空分布特征及其控制因素

苏海霞 刘姗 张莉 苏明 黄书勤 雷振宇

苏海霞, 刘姗, 张莉, 苏明, 黄书勤, 雷振宇. 南海南部北康盆地晚中新世以来深水沉积单元时空分布特征及其控制因素[J]. 地质科技通报, 2023, 42(6): 129-139. doi: 10.19509/j.cnki.dzkq.tb20220126
引用本文: 苏海霞, 刘姗, 张莉, 苏明, 黄书勤, 雷振宇. 南海南部北康盆地晚中新世以来深水沉积单元时空分布特征及其控制因素[J]. 地质科技通报, 2023, 42(6): 129-139. doi: 10.19509/j.cnki.dzkq.tb20220126
Su Haixia, Liu Shan, Zhang Li, Su Ming, Huang Shuqin, Lei Zhenyu. Spatiotemporal distribution characteristics and controlling factors of deep-water sediments in the Beikang Basin since the Late Miocene, southern South China Sea[J]. Bulletin of Geological Science and Technology, 2023, 42(6): 129-139. doi: 10.19509/j.cnki.dzkq.tb20220126
Citation: Su Haixia, Liu Shan, Zhang Li, Su Ming, Huang Shuqin, Lei Zhenyu. Spatiotemporal distribution characteristics and controlling factors of deep-water sediments in the Beikang Basin since the Late Miocene, southern South China Sea[J]. Bulletin of Geological Science and Technology, 2023, 42(6): 129-139. doi: 10.19509/j.cnki.dzkq.tb20220126

南海南部北康盆地晚中新世以来深水沉积单元时空分布特征及其控制因素

doi: 10.19509/j.cnki.dzkq.tb20220126
基金项目: 

广州海洋地质调查局合作研究项目"北康-曾母盆地深水沉积体精细刻画" DD20160155

详细信息
    作者简介:

    苏海霞(1997—),女,现正攻读海洋地质专业硕士学位,主要从事盆地深水沉积过程方面的研究工作。E-mail: suhx5@mail2.sysu.edu.cn

    通讯作者:

    苏明(1983—),男,教授,主要从事深水沉积过程及其资源效应方面的教学和科研工作。E-mail: suming3@mail.sysu.edu.cn

  • 中图分类号: P618.13

Spatiotemporal distribution characteristics and controlling factors of deep-water sediments in the Beikang Basin since the Late Miocene, southern South China Sea

  • 摘要:

    南海南部北康盆地是我国海域油气研究的重点区域, 前人对该区域沉积地层的研究集中在古近系烃源岩和中中新世碳酸盐岩储层, 有关晚中新世以来深水沉积发育及分布特征的研究仍很薄弱。为此, 研究用2D地震数据资料识别北康盆地晚中新世以来沉积单元, 揭示深水沉积单元分布特征及其控制因素。基于地震反射特征, 研究识别了北康盆地晚中新世以来的主要沉积体类型, 包括披覆沉积、块体流沉积和浊流沉积, 其中浊流沉积可进一步分为限制型浊积体和三角洲前缘浊积体。披覆沉积在北康盆地前隆区域大面积发育, 沉积厚度从南向北递减。块体流沉积则主要分布在研究区隆后盆地, 厚度自西南向东北递减。结果表明北康盆地晚中新世以来的深水沉积受到物源供给、地形、构造活动和海平面变化的控制。其中, 物源供给是控制研究区沉积体发育位置和厚度变化的主要因素。地形对重力流沉积(块体流沉积和三角洲前缘浊积体)和半远洋沉积的分布范围进行控制。研究成果可为深水沉积发育及其控制因素研究提供理论依据。

     

  • 图 1  研究区数据分布图

    Figure 1.  Datasets in the study area

    图 2  北康盆地新近纪-第四纪层序地层格架(据文献[5, 17]修改)

    Figure 2.  Sequence stratigraphic framework of Neogene and Quaternary in the Beikang Basin

    图 3  北康盆地典型地震剖面1的解释(剖面1位置见图 1)

    Figure 3.  Interpretation of typical seismic Profile 1 in the Beikang Basin

    图 4  北康盆地典型地震剖面2的解释(剖面2位置见图 1)

    Figure 4.  Interpretation of typical seismic Profile 2 in the Beikang Basin

    图 5  北康盆地典型地震剖面3的解释(剖面3位置见图 1)

    Figure 5.  Interpretation of typical seismic Profile 3 in the Beikang Basin

    图 6  北康盆地沉积单元厚度图

    a. 晚中新世披覆沉积;b. 上新世以来披覆沉积;c. 晚中新世重力流沉积;d. 上新世以来重力流沉积

    Figure 6.  Sedimentary thicknesses in the Beikang Basin

    图 7  南海南部海域水深图(海山与海丘的名称据文献[27])(a)与研究区晚中新世以来沉积体系分布图(b)

    Figure 7.  Bathymetric map of the southern South China Sea (a) and regional sedimentary distribution since the Late Miocene in the study area(b)

    图 8  北康盆地沉积地层分布模式图

    Figure 8.  Sedimentary geological model in the Beikang Basin

    表  1  研究区地震相的分类及特征

    Table  1.   Classification and characteristics of seismic facies in the study area

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  • 收稿日期:  2022-03-23
  • 录用日期:  2022-08-15
  • 修回日期:  2022-08-07

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