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题名: Characteristics of biomarkers in the Recent sediment from Qinghai Lake, northwest China
作者: FAN PU, QIAN YAORONG and ZHANG BAISHENG
刊名: Journal of Southeast Asian Earth Sciences
出版日期: 1991
卷号: Vol. 5, 期号:1-4, 页码:113-128
关键词: n-alkanes,amino acids ,lacustrine sediments
英文摘要: The occurrence of biomarker hydrocarbons in the Recent sediment of Qinghai Lake was investigated.It was found that the distribution of these biomarkers in Qinghai Lake, a semi-saline water lake, is unusual.The distribution of n-alkanes is predominated by high carbon-numbered alkanes with a high OEP (CPI) value.Two series of bicyclic sesquiterpanes derived from micro-organisms, e.g. algae or bacteria, were detected. The occurrence of tricyclic and tetracyclic terpenoids is characterized by the input of the organic matter from aquatic organisms. The conversion from hopenes existing in bateria and blue-green alge into hopanes is put forward in this paper,C27-C29 regular steranes,4-methylsteroids,diasteranes,pregnanes,norsteroids and secosteranes were found in abundance in the sedimentary samples. Another important contribution of this paper is towards the geochemistry of amino acids in the Recent sediment of Qinghai Lake. The composition, distribution and evolution of the amino acids in the lacustrine sediments will be discussed in detail. It was found that several ratios of different amino acids have a clear diagenesis trend in the two cores studied. The racemization reaction of amino acids and their application in the geochemistry will also be discussed. The racemization of alanine and leucine were employed in this study tocalculate the age of the sediment samples, with satisfactory result.
内容类型: 期刊论文
URI标识: http://ir.lig.ac.cn/handle/132962/2403
Appears in Collections:中国科学院兰州地质研究所_期刊论文

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FAN PU, QIAN YAORONG and ZHANG BAISHENG.Characteristics of biomarkers in the Recent sediment from Qinghai Lake, northwest China,Journal of Southeast Asian Earth Sciences,1991,Vol. 5( 1-4):113-128
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文件名: Journal of Southeast Asian Earth Sciences, Volume 5, Issues 1–4, 1991, Pages 113-128.pdf
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