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题名: The noble gas isotope geochemical composition of chert at the bottom of Cambrian in Tarim Basin, China
作者: Sun ShengLi ; Chen JianFa ; Zheng JianJing ; Liu WenHui
刊名: SCIENCE IN CHINA SERIES D-EARTH SCIENCES
出版日期: 2009
卷号: 52, 页码:115-119
关键词: Tarim Basin ; Cambrian ; chert ; rare gas isotope
学科分类: Geosciences, Multidisciplinary
英文摘要: The carbon isotopes of individual lipids in herbaceous plants and tree leaves in Ruoergai marsh were measured by the GC-IRMS analytical technique in order to understand the inherent relationships of carbon isotopes between sedimentary and plant lipids from typical marsh environment. The analytical results show that the carbon isotopic compositions of n-alkanes in different kinds of plants differ significantly. Mean delta(13)C values of n-alkanes in herbaceous plants (-32.2 parts per thousand - -36.9 parts per thousand) are 3.3 parts per thousand lower than those in woody plant (-27.2 parts per thousand - -35.0 parts per thousand). The carbon isotopic compositions of fatty acids in organisms (-30.3 parts per thousand - -36.2 parts per thousand) are very similar to those of n-alkanes and the delta(13)C values for unsaturated fatty acids are within the range of those for saturated fatty acids. The differences in g 13C values between plant lipids are obvious and range from 2.4 parts per thousand to 7.8 parts per thousand. It is observed that the carbon isotopic compositions of sedimentary lipids are closely related to those of plant lipids. The carbon isotopic compositions (-27.0 parts per thousand - -36.9 parts per thousand) of n-alkanes, >= C-16 fatty acids, n-alkanols, sterols and n-alkanones in the sediments are similar to those of plant lipids and the carbon isotopic compositions of short-chain sedimentary lipids are similar to those of long-chain sedimentary homologues. These indicate that the sedimentary lipids are derived from high plants. However, the delta(13)C values Of C-14:0 and C-15:0 fatty acids in the sediments are lighter than those of the same carbon number saturated homologues in plants, reflecting the genetic features partially derived from bacteria. These data provide scientific evidence for carbon isotope-applied research of individual lipids.
收录类别: SCI
所属项目名称: National Basic Research Program of China [G1999043306]
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.lig.ac.cn/handle/132962/2148
Appears in Collections:油气地球化学研究室_期刊论文

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Sun ShengLi; Chen JianFa; Zheng JianJing; Liu WenHui.The noble gas isotope geochemical composition of chert at the bottom of Cambrian in Tarim Basin, China,SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2009,52():115-119
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