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    南沙海区礼乐盆地碳酸盐台地地震响应及发育演化

    吴时国 赵学燕 董冬冬 王大伟 姚永坚

    吴时国, 赵学燕, 董冬冬, 王大伟, 姚永坚, 2011. 南沙海区礼乐盆地碳酸盐台地地震响应及发育演化. 地球科学, 36(5): 807-814. doi: 10.3799/dqkx.2011.083
    引用本文: 吴时国, 赵学燕, 董冬冬, 王大伟, 姚永坚, 2011. 南沙海区礼乐盆地碳酸盐台地地震响应及发育演化. 地球科学, 36(5): 807-814. doi: 10.3799/dqkx.2011.083
    WU Shi-guo, ZHAO Xue-yan, DONG Dong-dong, WANG Da-wei, YAO Yong-jian, 2011. Seismic Response and Development of Carbonate Platform in Liyue Basin, Nansha Sea Area. Earth Science, 36(5): 807-814. doi: 10.3799/dqkx.2011.083
    Citation: WU Shi-guo, ZHAO Xue-yan, DONG Dong-dong, WANG Da-wei, YAO Yong-jian, 2011. Seismic Response and Development of Carbonate Platform in Liyue Basin, Nansha Sea Area. Earth Science, 36(5): 807-814. doi: 10.3799/dqkx.2011.083

    南沙海区礼乐盆地碳酸盐台地地震响应及发育演化

    doi: 10.3799/dqkx.2011.083
    基金项目: 

    中国科学院知识创新重要方向项目群项目 KZCX2-YW-Q05-047

    国家重点基础研究发展计划“973”项目 2009CB219406

    详细信息
      作者简介:

      吴时国(1963—), 男, 研究员, 研究方向为海洋地质和地球物理.Email: swu@qdio.ac.cn

    • 中图分类号: P539.2

    Seismic Response and Development of Carbonate Platform in Liyue Basin, Nansha Sea Area

    • 摘要: 礼乐盆地位于南海南部的南沙地块, 自中生代以来, 经历了挤压、张裂、沉降和碰撞挤压等多期次构造过程, 发育众多的碳酸盐台地, 是一个很有勘探潜力的叠合盆地.根据位于礼乐盆地东北边缘的地震测线NH973-2, 结合部分已发表的钻井地震资料, 开展盆地的层序地层研究, 揭示了礼乐盆地的地层层序, 分析了礼乐台地的地震特征.礼乐滩碳酸盐台地具有典型的丘状外形和杂乱的内部反射特征.根据地震计算对礼乐地区的构造沉降分析, 划分了新生代盆地演化阶段, 指出构造作用控制了礼乐碳酸盐台地发育.

       

    • 图  1  南沙海区礼乐盆地构造区划与文中涉及地震测线位置

      虚线代表盆地边界; 白线代表文中讨论的地震剖面位置

      Fig.  1.  Tectonic division for Liyue basin in Nansha area and seismic line mentioned about in discussion

      图  2  礼乐盆地地层划分对比

      Fig.  2.  Sequences division and comparison for Liyue basin

      图  3  NH973-2测线地层层序

      Fig.  3.  Stratigraphic sequences for line NH973-2

      图  4  NH973-2南段地震剖面地层划分

      Fig.  4.  Stratigraphic sequences division for south seismic section of line NH973-2

      图  5  礼乐滩地震剖面及地质模型

      a.反射地震剖面; b.中新世以来地层模型

      Fig.  5.  Seismic section and stratigraphic model for Liyue bank

      图  6  NH973-2测线剖面波阻抗反演结果

      Fig.  6.  Impedance Inversion for seismic line NH973-2

      图  7  礼乐滩及盆地南部波阻抗反演结果

      a.NH973-2测线礼乐滩碳酸盐台地的反演结果; b.盆地南部反演结果(图例同7a)

      Fig.  7.  Impedance inversion result for Liyue bank and South basin

      图  8  根据NH973-2计算的区域构造沉降与全球海平面变化曲线(据Haq et al., 1987)

      Fig.  8.  Curves of tectonic subsidence according to line NH973-2 calculation and global sea level variation

      图  9  L2地震测线: 礼乐碳酸盐台地沉积模式(刘海龄, 个人通讯)

      Fig.  9.  Seismic line L2: carbonate platform sedimentary model

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    出版历程
    • 收稿日期:  2011-05-28
    • 刊出日期:  2011-09-15

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