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    岐口凹陷新近系生物-遗迹相及环境解释

    刘彦博 严德天 王华 卢宗盛 喻建新

    刘彦博, 严德天, 王华, 卢宗盛, 喻建新, 2009. 岐口凹陷新近系生物-遗迹相及环境解释. 地球科学, 34(3): 412-418.
    引用本文: 刘彦博, 严德天, 王华, 卢宗盛, 喻建新, 2009. 岐口凹陷新近系生物-遗迹相及环境解释. 地球科学, 34(3): 412-418.
    LIU Yan-bo, YAN De-tian, WANG Hua, LU Zong-sheng, YU Jian-xin, 2009. Biofacies and Ichnofacies of Neogene in the Qikou Depression and Their Environmental Interpretation. Earth Science, 34(3): 412-418.
    Citation: LIU Yan-bo, YAN De-tian, WANG Hua, LU Zong-sheng, YU Jian-xin, 2009. Biofacies and Ichnofacies of Neogene in the Qikou Depression and Their Environmental Interpretation. Earth Science, 34(3): 412-418.

    岐口凹陷新近系生物-遗迹相及环境解释

    基金项目: 

    国家自然科学基金 40872077

    湖北省自然科学重点基金 2008CDA098

    详细信息
      作者简介:

      刘彦博(1970-)‚男‚副研究员‚主要从事应用沉积学、高等教育管理方面的研究.E-mail: liuyanbo@cug.edu.cn

    • 中图分类号: P588.2;P618

    Biofacies and Ichnofacies of Neogene in the Qikou Depression and Their Environmental Interpretation

    • 摘要: 岐口凹陷新近系包括明化镇组和馆陶组.通过新近系中的孢粉、介形虫和遗迹组构的系统研究, 识别出孢粉53个属种, 并建立了两个孢粉组合, 分别为Magnastites (粗肋孢) -Ulmus (榆粉) -Taxodiaceae pollenites (杉粉) 组合和Polygonaceae-Chenopodiaceae组合; 发现介形虫12个属种, 介形类以金星介科分子为主, 少数湖花介科分子, 以壳形单一、壳壁薄、表面光滑的类型为主, 表现了典型的非海相淡水介形类面貌; 划分出4种遗迹组构类型, 分别为Scoyenia遗迹组构、Skolithos遗迹组构、Palaeophycus遗迹组构和强扰动组构.在此基础上, 探索了生物与环境的关系, 划分了A、B、C、D、E5种生物-遗迹相带, 分别代表泛滥平原、蓄水注地或泛滥平原小型湖、河道及水下分流河道边部、滨浅湖和前三角洲沉积环境.

       

    • 图  1  黄骅坳陷区域构造及研究区位置

      Fig.  1.  The location and tectonic map of Huanghua depression

      图  2  岐口凹陷新近系典型孢粉化石属种

      1.Toroisporis sp.托弟蕨孢(未定种); 2、3.Taxodiaceae pollenites hiatus破隙杉粉; 4、5.Gothenpollenites sp.高腾粉(未定种); 6.Quercoidites minutus小栎粉; 7.Q. henrici亨氏栎粉; 8.Rutaceoidites sp.芸香粉(未定粉); 9.Rhoipites sp.漆树粉(未定种); 10.Trapa菱属; 11.Alnipollenites sp.桤木粉(未定种); 12.Chenopodipollis sp.藜粉(未定种); 13.Campenia sp. 1褶皱藻(未定种1);14.Momipites coryloides拟榛粉; 15.Juglanspollenites sp.胡桃粉(未定种); 16.Liquidambardites sp.枫香粉(未定种); 17.Tricolpites sp.三沟粉(未定种); 18.Campenia sp. 2褶皱藻(未定种2);19.Pterocarya pollenites sp.枫杨粉(未定种); 20.Caryapollenites triangular三角山核桃粉; 21.Salixipollenites sp.柳粉(未定种); 22.Ulmipollenites minor小榆粉; 23、28.Leiosphaeridium sp.光面球藻(未定种); 24、26、27.Pinuspollenites sp. 1双束松粉(未定种1);25.Pinuspollenites sp. 2双束松粉(未定种2).所有化石均放大800倍

      Fig.  2.  The representative genus of Neogene sporopollen in the Qikou depression

      图  3  岐口凹陷新近系典型介形虫属种

      1.Candona planus; 2.Darwinuda exils; 3.Limnocythere sp.1;4.Limnocythere sp.2;5、6.Mediocypris gudavensis; 7.Ilyocypris salebrosa stepanaiys; 8、9.Ilyocypris gudavensis; 10.Mediocypris gudavensis; 11.Ilyocpris subdunschanesis; 12、14.Metacypris datongensis; 13.Cyprinotus chiuhsiensis.所有化石均放大60倍

      Fig.  3.  The representative genus of Neogene ostracod in the Qikou depression

      图  4  岐口凹陷新近系岩心遗迹相特征

      a.Cylindricum(圆柱迹), 港深63-1井, 1 448.9 m; b.Skolithos(石针迹的横断面), 庄浅6井, 1 663.5 m; c.Palaeophycus(丛藻迹), 港92井, 1 731.0 m; d.生物扰动构造, 港深64-1井, 1 560.5 m

      Fig.  4.  Characteristics of Neogene ichnofabrics in the Qikou depression

      图  5  岐口凹陷新近系遗迹组构特点素描

      a.Scoyenia遗迹组构; b.Skolithos遗迹组构; c.Palaeophycus遗迹组构; d.强扰动组构

      Fig.  5.  The sketch map of Neogene ichnofabric characteristics in the Qikou depression

      图  6  岐口凹陷新近系生物相分布的环境模式

      DC.分流河道; VCS.决口扇; LB.分流河道边部; SCH.水下分流河道; SOB.水下分流河道边部; MB.分流河口坝; PDM.前三角洲; OL.浅湖; PL.泛滥平原小型湖

      Fig.  6.  The environment model of Neogene biofacies in the Qikou depression

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    • 收稿日期:  2008-10-24
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