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    青海循化盆地新近纪磁性地层学

    季军良 张克信 强泰 寇晓虎 陈奋宁 徐亚东 路晶芳 林启祥

    季军良, 张克信, 强泰, 寇晓虎, 陈奋宁, 徐亚东, 路晶芳, 林启祥, 2010. 青海循化盆地新近纪磁性地层学. 地球科学, 35(5): 803-810. doi: 10.3799/dqkx.2010.093
    引用本文: 季军良, 张克信, 强泰, 寇晓虎, 陈奋宁, 徐亚东, 路晶芳, 林启祥, 2010. 青海循化盆地新近纪磁性地层学. 地球科学, 35(5): 803-810. doi: 10.3799/dqkx.2010.093
    JI Jun-liang, ZHANG Ke-xin, Qiang Tai, KOU Xiao-hu, CHEN Fen-ning, XU Ya-dong, LU Jing-fang, LIN Qi-xiang, 2010. Magnetostratigraphy of the Neogene Strata in Xunhua Basin, Qinghai Province. Earth Science, 35(5): 803-810. doi: 10.3799/dqkx.2010.093
    Citation: JI Jun-liang, ZHANG Ke-xin, Qiang Tai, KOU Xiao-hu, CHEN Fen-ning, XU Ya-dong, LU Jing-fang, LIN Qi-xiang, 2010. Magnetostratigraphy of the Neogene Strata in Xunhua Basin, Qinghai Province. Earth Science, 35(5): 803-810. doi: 10.3799/dqkx.2010.093

    青海循化盆地新近纪磁性地层学

    doi: 10.3799/dqkx.2010.093
    基金项目: 

    中国地质调查局项目 1212010610103

    国家自然科学基金项目 40902049

    国家自然科学基金项目 40921062

    国家自然科学基金项目 40830212

    中央高校基本科研业务费专项资金资助项目 CUGL09206

    详细信息
      作者简介:

      季军良(1977-), 男, 讲师, 主要从事磁性地层学与第四纪地质学研究.E-mail: jijl@cug.edu.cn

    • 中图分类号: P539.3

    Magnetostratigraphy of the Neogene Strata in Xunhua Basin, Qinghai Province

    • 摘要: 青藏高原东北部是研究高原隆升和东亚季风演化的重要地区.通过对青藏高原东北部循化盆地西沟剖面新近纪河湖相沉积的磁性地层学研究, 建立了西沟剖面约14.6~5.0 Ma沉积物的磁极性年代框架.沉积相的分析表明, 循化盆地在约14.6~5.0 Ma期间总体上处于充填萎缩阶段.西沟剖面巨厚层砾岩首次出现的时间约为7.3 Ma前, 应是青藏高原东北部快速隆升的沉积响应.这与青藏高原在约8.0 Ma前快速隆升的时间相近, 进一步说明约8.0 Ma前青藏高原的构造隆升具有准同时性.

       

    • 图  1  (a) 研究区地理位置;(b)研究区地质简图(据中国地质调查局与成都地质矿产研究所,2004绘制)和西沟剖面位置

      Fig.  1.  (a) Map showing the location of the studied area; (b) sketch geological map showing the Xunhua basin and the location of the Xigou Section

      图  2  西沟剖面代表性样品热退磁正交矢量(Z式图)和剩磁强度比值随温度变化曲线

      实心(空心)圆点代表剩磁的水平(垂直)分量,图中数据为温度(℃)

      Fig.  2.  Orthogonal (Zijderveld) vector plots of representative specimens from different levels in the Xigou section and Decay of the nature remanent magnetization (NRM) during thermal demagnetization

      图  3  循化盆地西沟剖面岩性、磁性地层及与标准极性柱(Cande and Kent, 1995)的对比

      Fig.  3.  Lithology and magnetostratigraphic results from the Xigou Section in the Xunhua basin and correlations with the CK95 GPTS

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    • 收稿日期:  2010-05-31
    • 刊出日期:  2010-09-01

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