| 柴达木盆地察尔汗湖区古湖相沉积物中含氮类分子化石的检出 |
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| 关键词:nitrogen-bearing molecular fossil paleolake sediments fatty acid amide fatty nitrile Qinghai-Tibet plateau |
| 基金项目:国家自然科学基金项目(编号：40871096)和中国科学院“百人计划”项目 |
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| 摘要: |
| The Distribution of Nitrogen-bearing Lipid Biomarker in the Shell Bar Paleolake Sediments from Qarhan Paleolake, Qaidam Basin |
| A series of analogs of fatty acid amide and fatty nitrile were identified along the shell bar section of the Qaidam Basin in Qinghai-Tibet Plateau by using the gas chromatography-mass spectrometry (GC-MS). On such a basis, the distribution characteristics of the nitrogen-bearing lipids have been discussed in detail in this paper. According to previous studies and geographical conditions of the Qaidam Basin, the authors hold that the early diagenesis partly converted the fatty acid amide into the fatty nitrile. However, the ratio of the unsaturated fatty acid amide to the saturated one is relatively stable in the profile, indicating that there existed no obvious selectivity between these two types of fatty acid amides during the diagenetic processes including various biological, chemical and physical actions. It is therefore concluded that the depositional environment in the Qarhan paleolake was relatively aerobic during the organic component deposition. Being the first description of the fatty acid amide and fatty nitrile in paleolake sediments, this report provides the basis for the nitrogen-bearing lipids investigation in lake sediments. |
| PU Yang,ZHANG Hu-cai,LEI Guo-liang,CHANG Feng-qin,YANG Ming-sheng.2010.The Distribution of Nitrogen-bearing Lipid Biomarker in the Shell Bar Paleolake Sediments from Qarhan Paleolake, Qaidam Basin[J].Acta Geoscientica Sinica,31(2):155-162. |
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