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单甲基支链烷烃的单体碳同位素研究

卢鸿,  孙永革,  彭平安

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文章导航 > 沉积学报  > 2003 >  21(2): 360-365
卢鸿, 孙永革, 彭平安. 单甲基支链烷烃的单体碳同位素研究[J]. 沉积学报, 2003, 21(2): 360-365.
引用本文: 卢鸿, 孙永革, 彭平安. 单甲基支链烷烃的单体碳同位素研究[J]. 沉积学报, 2003, 21(2): 360-365.
shu
LU Hong, SUN Yong-ge, PENG Ping-an. Molecular Stable Carbon Isotopic Compositions of Mono-methyl Branched Alkanes[J]. Acta Sedimentologica Sinica, 2003, 21(2): 360-365.
Citation: LU Hong, SUN Yong-ge, PENG Ping-an. Molecular Stable Carbon Isotopic Compositions of Mono-methyl Branched Alkanes[J]. Acta Sedimentologica Sinica, 2003, 21(2): 360-365.
shu

单甲基支链烷烃的单体碳同位素研究

  • 中国科学院广州地球化学研究所有机地球化学国家重点实验室 广州 510640

基金项目: 国家基础研究“973”项目(编号:G1999043308)；中国科学院创新知识工程项目(KZCX1-SW-18)资助
详细信息
    作者简介:

    卢鸿,男,1971年出生,博士后,油气地球化学和有机地球化学

  • 中图分类号: P593

Molecular Stable Carbon Isotopic Compositions of Mono-methyl Branched Alkanes

  • State Key Laboratory of Organic Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640

    摘要
  • 摘要: 轮南14井三叠系油砂中烷烃类呈双峰型分布,前峰型正构烷烃(nC12～nC22)单体碳同位素较轻(-33.72‰～-32.84‰);后峰型正构烷烃(nC23～nC32)单体碳同位素略重(-32.02‰～-30.90‰),反映两种不同生源的生烃贡献。同时,在后峰型正构烷烃之间检测到了丰富的单甲基支链烷烃系列化合物,该类化合物与后峰型正构烷烃具有相同的单体碳同位素组成(-30.52‰～-31.64‰),指示二者具有共同的母质成因。文献及实测单体碳同位素组成表明单甲基支链烷烃属细菌等微生物来源,因此,对传统的双峰型分布中后峰正构烷烃属高等植物来源的认识提出置疑。
    Abstract: Bimodal distribution was explored for n-alkanes in an oilsand sample from well Lunnan 14, Lunnan oilfield, Tarim Basin, NW China. GC-C-IRMS analyses indicated that the stable carbon isotopic compositions for nC 23～nC 32 n-alkanes (-32.02‰～-30.90‰) were isotopically heavier than that of nC 12～nC 22 n-alkanes (-33.72‰～-32.84‰) which reflect the contributions of two different organic matter inputs.In the mean time, high content mono-methyl branched alkane homologues were detected during the nC 23～nC 32 n-alkanes which have the same or similar stable carbon isotopic compositions (-30.52‰～-31.64‰) with nC 23～nC 32 n-alkanes. This seems to mean that they share the same genetic scheme. According to marvelous literatures and the measured stable carbon isotopic compositions, mono-methyl branched alkanes should be derived from microorganism, thus, a suspicion was put forward for the general biological precursor of which the high molecular weight n-alkanes (nC 23～nC 32) were derived from higher plant.
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    • 参考文献(29)
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  • 收稿日期:  2001-09-17
  • 修回日期:  2001-11-14
  • 刊出日期:  2003-06-10

目录

    单甲基支链烷烃的单体碳同位素研究

    • 中国科学院广州地球化学研究所有机地球化学国家重点实验室 广州 510640
      • 基金项目:  国家基础研究“973”项目(编号:G1999043308)；中国科学院创新知识工程项目(KZCX1-SW-18)资助
      作者简介:

      卢鸿,男,1971年出生,博士后,油气地球化学和有机地球化学

    • 收稿日期: 2001-09-17
    • 修回日期: 2001-11-14
    • 刊出日期: 2003-06-10

    • 中图分类号: P593

    摘要: 轮南14井三叠系油砂中烷烃类呈双峰型分布,前峰型正构烷烃(nC12～nC22)单体碳同位素较轻(-33.72‰～-32.84‰);后峰型正构烷烃(nC23～nC32)单体碳同位素略重(-32.02‰～-30.90‰),反映两种不同生源的生烃贡献。同时,在后峰型正构烷烃之间检测到了丰富的单甲基支链烷烃系列化合物,该类化合物与后峰型正构烷烃具有相同的单体碳同位素组成(-30.52‰～-31.64‰),指示二者具有共同的母质成因。文献及实测单体碳同位素组成表明单甲基支链烷烃属细菌等微生物来源,因此,对传统的双峰型分布中后峰正构烷烃属高等植物来源的认识提出置疑。

    English Abstract

    卢鸿, 孙永革, 彭平安. 单甲基支链烷烃的单体碳同位素研究[J]. 沉积学报, 2003, 21(2): 360-365.
    引用本文: 卢鸿, 孙永革, 彭平安. 单甲基支链烷烃的单体碳同位素研究[J]. 沉积学报, 2003, 21(2): 360-365.
    shu
    LU Hong, SUN Yong-ge, PENG Ping-an. Molecular Stable Carbon Isotopic Compositions of Mono-methyl Branched Alkanes[J]. Acta Sedimentologica Sinica, 2003, 21(2): 360-365.
    Citation: LU Hong, SUN Yong-ge, PENG Ping-an. Molecular Stable Carbon Isotopic Compositions of Mono-methyl Branched Alkanes[J]. Acta Sedimentologica Sinica, 2003, 21(2): 360-365.
    shu

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