Compositions of n-Alkanes and Their Isotopes in Plants from the Different Latitude Regions in China
详细信息
- 责任者：Duan Yi (Key Laboratory of Petroleum Resources Research ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Wu Baoxiang
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(2)
- 关键词：植物区系 ; floral provinces ; 正烷烃 ; n-alkanes
- 页码：p.262-271
- 图表：10 illus., 3 tables, 50 refs.
- 分类号：0600
- 出版序号：20120108
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
n-Alkanes and their carbon and hydrogen stable isotopes were analyzed in grasses, reeds and tree leaves from five regions with latitudes of 22° to 39° in China using GC-MS and GC-TC-IRMS techniques. In this study, it is found that a change of ACL units for crossing 1 latitude and increasing 1 ℃ is 0.08 for grass, 0.22 for reed and 0.36 for tree leaves and 0.04 for grass, 0.24 for reed and 0.20 for tree leaves, respectively. The δ13C values of C27 and C29 n-alkanes in the studied plants ranges from -25.3‰ to -35.5‰ and the grass has a lighter mean carbon isotopic composition than the reed and tree leaves. The δD values of C27 and C29 n-alkanes in the plants are between -132.1‰ and -192.6‰ and the mean hydrogen isotopic compositions of C27 and C29 n-alkanes in the grass are lighter than those in the reed and tree leaves. C27 and C29 n-alkanes in the grass and tree leaf samples from high latitude and elevation area have relatively light hydrogen isotopic composition.
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