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    渤海湾盆地东营凹陷S6'界面的构造变革意义

    任建业

    任建业, 2004. 渤海湾盆地东营凹陷S6'界面的构造变革意义. 地球科学, 29(1): 69-76.
    引用本文: 任建业, 2004. 渤海湾盆地东营凹陷S6'界面的构造变革意义. 地球科学, 29(1): 69-76.
    REN Jian-ye, 2004. Tectonic Significance of S6′ Boundary in Dongying Depression, Bohai Gulf Basin. Earth Science, 29(1): 69-76.
    Citation: REN Jian-ye, 2004. Tectonic Significance of S6′ Boundary in Dongying Depression, Bohai Gulf Basin. Earth Science, 29(1): 69-76.

    渤海湾盆地东营凹陷S6'界面的构造变革意义

    基金项目: 

    国家自然科学基金项目 40372067

    详细信息
      作者简介:

      任建业(1963-), 男, 博士, 教授, 主要从事沉积盆地动力学及其资源效应方面的教学和科研工作.E-mail: jyren@cug.edu.cn

    • 中图分类号: P618.130.2

    Tectonic Significance of S6′ Boundary in Dongying Depression, Bohai Gulf Basin

    • 摘要: 以三维地震剖面的解释为基础, 在东营凹陷古近纪裂陷期充填序列中识别出了一条在全盆地范围内可以追索对比的区域性不整合界面S6′, 该界面构成了盆地沙三段的底界.盆地充填地层的厚度和构造应力场分析揭示, S6′界面将盆地古近纪同裂陷期的演化划分为2个不同构造应力场控制的裂陷幕, 即裂陷Ⅰ - Ⅱ幕和裂陷Ⅲ -Ⅳ幕.前者受控于近南北向的拉伸应力场, 形成了分别由NWW向的陈南断裂和石村断裂带控制的半地堑式断陷盆地; 后者受控于NW-SE向的拉伸应力场, 形成了由NE向的断裂系统控制的半地堑式断陷盆地.S6′界面的发育是区域性的, 在渤海湾盆地和中国东部的许多盆地中均可追索, 其发育的时代为中始新世晚期(43.5 Ma), 并且与印度洋板块和太平洋板块新生代期间的一次重大的运动学调整的时间一致, 因此, S6′界面的识别有可能为中国东部新生代盆地形成演化的动力学背景的研究提供新的信息.

       

    • 图  1  东营凹陷的地质构造格架示意图

      Fig.  1.  Sketch map of geological tectonic in Dongying depression

      图  2  东营凹陷新生界充填序列和沉降历史

      Fig.  2.  Cenozoic filling sequence and subsidence history of Dongying depression

      图  3  东营凹陷625.8测线三维地震剖面及其地质解释

      (剖面位置见图 1, 界面代号地质意义见图 5)

      Fig.  3.  Inline 625.8 3D seismic profile and its geological interpretation of Dongying depression

      图  4  东营凹陷古近纪同裂陷期地层厚度等值线(a-d)和构造应力场(e)

      Fig.  4.  Thickness isolines (a-d) and tectonic stress field (e) of Tertiary strata in Dongying depression

      图  5  东营凹陷系列地震地质解释剖面

      Fig.  5.  Geological interpretation sections for seismic profiles of Dongying depression

      图  6  沿凹陷陡坡带沉降速率的变化

      Fig.  6.  Changes of subsidence rate along the deep slope belt of Dongying depression

      图  7  东营凹陷第三系层序界面形成时代

      Fig.  7.  Ages of Tertiary sequence boundaries in Dongying depression

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    出版历程
    • 收稿日期:  2003-05-02
    • 刊出日期:  2004-01-25

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