青海湖沉积物支链和环烷烃组分中C20，C25和C30高度支链类异戊二烯烯烃

李景贵; 范璞; 崔明中; 李振西; R. P. Philp; J. Allen

青海湖沉积物支链和环烷烃组分中C₂₀，C₂₅和C₃₀高度支链类异戊二烯烯烃

1 中国科学院兰州地质研究所兰州 730000;
2 University of Oklahoma, School of Geology and Geophysics, Norman, OK 73019 USA

基金项目: 中国科学院兰州分院（1994）部分资助。

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作者简介:
李景贵,52岁,副研究员,有机地球化学

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C₂₀, C₂₅ and C₃₀ Highly Branched Isoprenoid Alkenes in The Branched and Cyclic Hydrocarbon Fractions of Qinghai Lake Sediments

1 Lanzhou Institute of Geology, Academia Sinica, Lanzhou 730000 China;
2 University of Oklahoma, School of Geology and Geophysics, Norman, OK 73019 USA

摘要

摘要: 在青海湖不同盐度的四孔近代沉积物岩芯（Ｑ－１６Ａ，ＱＨ，ＱＥ和ＱＧ）（图１）抽提物支链和环烷烃组分中检出了非常丰富的Ｃ₂₀，Ｃ₂₅和Ｃ₃₀高度支链类异戊二烯烯烃（ｈｉｇｈｌｙｂｒａｎｃｈｅｄｉｓｏｐｒｅｎｏｉｄａｌｋｅｎｅｓ），简称ＨＢＩ烯烃。这是在我国近代湖泊沉积物发现这类化合物的首次详细报导。由于Ｃ₂₀，Ｃ₂₅和Ｃ₃₀ＨＢＩ烯烃比正构烷烃具有较强的抵抗生物降解的能力（ＲｏｂｓｏｎａｎｄＲｏｗｌａｎｄ，１９８８ｂ），因此，它们广泛分布于各种近代环境中，如湖泊、海洋和高盐环境的近代沉积物中（ＲｏｗｌａｎｄａｎｄＲｏｂｓｏｎ，１９９０）。并且，具有１～６个双键的Ｃ₂₀，Ｃ₂₅和Ｃ₃₀烯烃经常是现代沉积物中丰富的烃类。最近在印度洋现代沉积物中又发现了一个新的具有７个双键的Ｃ₃₅ＨＢＩ烯烃（Ｈｏｅｆｓｅｔａｌ，１９９５）。全饱和的Ｃ₂₀（Ｉ，附图）、Ｃ₂₅（Ⅱ，附图）和Ｃ₃₀（Ⅲ，附图）ＨＢＩ烷烃已通过标样的合成确切地确定了它们的结构。在青海湖ＱＧ孔（尕海，咸水）和ＱＥ孔（耳海，淡水）抽提物中发现了Ｃ₂₀单烯（１号峰，图２ａ）。Ｃ₂₅烯烃（２号峰，图２ａ、２ｂ）和Ｃ₃₀烯烃（主要是３号和８号峰，图２ａ、２ｂ）存在于所有四孔沉积物中。
- 高度支链类异戊二烯烯烃（HBI烯烃） /
- 高度支链类异戊二烯噻吩（HBI噻吩） /
- 硅藻 /
- 石油成因
Abstract: The very abundant highly branched isoprenoid (HBI) alkenes (C₂₀,C₂₅ and C₃₀) have been detected in four cores of Qinghai Lake recent sediments. This is the first report of these compounds in Chinese recent lake sediments. Diatoms may be the biological source of these sedimentary HBI alkenes.
- BHI alkenes /
- HBI thiophenes /
- diatoms /
- petroleum origin

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参考文献(1)

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青海湖沉积物支链和环烷烃组分中C₂₀，C₂₅和C₃₀高度支链类异戊二烯烯烃

作者简介:
李景贵,52岁,副研究员,有机地球化学

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C₂₀, C₂₅ and C₃₀ Highly Branched Isoprenoid Alkenes in The Branched and Cyclic Hydrocarbon Fractions of Qinghai Lake Sediments

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青海湖沉积物支链和环烷烃组分中C₂₀，C₂₅和C₃₀高度支链类异戊二烯烯烃

1 中国科学院兰州地质研究所兰州 730000;

2 University of Oklahoma, School of Geology and Geophysics, Norman, OK 73019 USA

作者简介:
李景贵,52岁,副研究员,有机地球化学

English Abstract

C₂₀, C₂₅ and C₃₀ Highly Branched Isoprenoid Alkenes in The Branched and Cyclic Hydrocarbon Fractions of Qinghai Lake Sediments

1 Lanzhou Institute of Geology, Academia Sinica, Lanzhou 730000 China;

2 University of Oklahoma, School of Geology and Geophysics, Norman, OK 73019 USA

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