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    安徽宣城更新世红土正构烷烃分布特征及其古植被意义

    梁斌 谢树成 顾延生 郭建秋 阮小燕 易轶 黄俊华

    梁斌, 谢树成, 顾延生, 郭建秋, 阮小燕, 易轶, 黄俊华, 2005. 安徽宣城更新世红土正构烷烃分布特征及其古植被意义. 地球科学, 30(2): 129-132.
    引用本文: 梁斌, 谢树成, 顾延生, 郭建秋, 阮小燕, 易轶, 黄俊华, 2005. 安徽宣城更新世红土正构烷烃分布特征及其古植被意义. 地球科学, 30(2): 129-132.
    LIANG Bin, XIE Shu-cheng, GU Yan-sheng, GUO Jian-qiu, RUAN Xiao-yan, YI Yi, HUANG Jun-hua, 2005. Distribution of n-Alkanes as Indicative of Paleovegetation Change in Pleistocene Red Earth in Xuancheng, Anhui. Earth Science, 30(2): 129-132.
    Citation: LIANG Bin, XIE Shu-cheng, GU Yan-sheng, GUO Jian-qiu, RUAN Xiao-yan, YI Yi, HUANG Jun-hua, 2005. Distribution of n-Alkanes as Indicative of Paleovegetation Change in Pleistocene Red Earth in Xuancheng, Anhui. Earth Science, 30(2): 129-132.

    安徽宣城更新世红土正构烷烃分布特征及其古植被意义

    基金项目: 

    中国地质调查局项目“中国南方红土型第四系的划分与对比” 200113900072

    详细信息
      作者简介:

      梁斌(1967-), 男, 高级工程师, 现在中国地质大学攻读古生物学与地层学专业博士学位, 主要从事地球表层与环境研究

    • 中图分类号: Q91

    Distribution of n-Alkanes as Indicative of Paleovegetation Change in Pleistocene Red Earth in Xuancheng, Anhui

    • 摘要: 利用气相色谱-质谱联用仪(GC-MS) 在安徽宣城更新世红土中检测出了微量的分子化石,包括正构烷烃、一元正脂肪酸、一元正脂肪醇以及α-正构脂肪酮等.正构烷烃的分布型式表明其来源于低等菌藻类生物和陆生高等植物,其中高碳数正构烷烃主要以C29为主峰,显示流域中的植被类型以木本植物为主; (C27+C29)/(C31+C33) 比值的变化反映出,在以木本植物占优势的背景下,流域中草本植物的相对比例也发生了多次变化.这一比值在本剖面上表现出多阶段的变化,而且这种变化与岩性、粒度变化密切相关,反映出这些参数可能还蕴涵着古气候信息.

       

    • 图  1  安徽宣城红土剖面正构烷烃的质量色谱

      a.4.8 m处的样品; b.7.8 m处的样品

      Fig.  1.  GC/MS mass chromatograms of n-alkanes in red earth

      图  2  红土正构烷烃(C27+C29)/(C31+C33) 比值的变化曲线(剖面4 m以上的分层及岩性据乔彦松等, 2003)

      Fig.  2.  (C27+C29)/(C31+C33) of n-alkanes in red earth

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    出版历程
    • 收稿日期:  2004-07-15
    • 刊出日期:  2005-03-25

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