咸水湖泊沉积物中正构烷烃及其氢同位素组成与成因

段毅; 何金先; 吴保祥; 徐丽; 张晓丽; 孙涛

doi:10.3799/dqkx.2011.006

Volume 36 Issue 1

Jan. 2011

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DUAN Yi, HE Jin-xian, WU Bao-xiang, XU Li, ZHANG Xiao-li, SUN Tao, 2011. Composition and Genesis of n-Alkanes and Their Hydrogen Isotope in Sediments from Saline Lake, China. Earth Science, 36(1): 53-61. doi: 10.3799/dqkx.2011.006

Citation:

DUAN Yi, HE Jin-xian, WU Bao-xiang, XU Li, ZHANG Xiao-li, SUN Tao, 2011. Composition and Genesis of n-Alkanes and Their Hydrogen Isotope in Sediments from Saline Lake, China. Earth Science, 36(1): 53-61. doi: 10.3799/dqkx.2011.006

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Composition and Genesis of n-Alkanes and Their Hydrogen Isotope in Sediments from Saline Lake, China

doi: 10.3799/dqkx.2011.006

Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 2010-10-10
Publish Date: 2011-01-01

Abstract

Abstract

The Qinghai Lake is the largest saline lake in China. We study the compositions of n-alkanes and their hydrogen isotope in sediments from the lake, and discuss the genesis of their compositions by the comparison with previous study results of plants from the lake and its surrounding areas. Our results show that the n-alkanes in the surface and core sediments have a similar distribution which reflects the source from terrestrial herbaceous plants in the surrounding regions of the lake. The hydrogen isotopic compositions of n-alkanes in the surface and core sediments are also similar, which indicates that n-alkanes in the sediments were derived from terrestrial herbaceous plants in surrounding regions of the lake. This study further demonstrates that the hydrogen isotopic compositions of n-alkanes in lake sediment reflect the biological source hydrogen isotopic signals that are related to paleoclimate. Therefore, δD values of n-alkanes in lake sediment can be used to indicate paleoclimate.
- geochemistry,
- saline lake,
- sediment,
- distribution of n-alkane,
- hydrogen isotopic composition,
- genesis

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References(32)

References

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