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[1]郭金春,刘清浩,马海州,等.察尔汗盐湖正构烷烃和单体碳同位素分布特征及其古植被意义[J].地球化学,2010,39(06):566-573.
　GUO Jin-chun,LIU Qing-hao,MA Hai-zhou and HU Jian-fang.Chemical and compound-specific carbon isotopic characteristics of n-alkanes in the Qarhan Salt Lake sediments and their paleovegetation significance[J].Geochimica,2010,39(06):566-573.

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察尔汗盐湖正构烷烃和单体碳同位素分布特征及其古植被意义

《地球化学》[ISSN:0379-1726/CN:44-1398/P] 卷: 第39卷期数: 2010年06期页码: 566-573 栏目: 地球化学出版日期: 2010-12-20

Title:: Chemical and compound-specific carbon isotopic characteristics of n-alkanes in the Qarhan Salt Lake sediments and their paleovegetation significance

文章编号:: 0379-1726（2010）06-0566-08

作者:: 郭金春¹, 2, 刘清浩², 马海州³, 胡建芳¹; 1.中国科学院广州地球化学研究所有机地球化学国家重点实验室, 广东广州510640 2.中北大学化工与环境学院, 山西太原030051 3.中国科学院青海盐湖研究所, 青海西宁810008

Author(s):: GUO Jin-chun, LIU Qing-hao, MA Hai-zhou and HU Jian-fang; 1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;2. School of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China;3. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China

关键词:: 湖泊沉积物; 正构烷烃; 碳同位素; 古植被; 察尔汗盐湖

Keywords:: lake sediments; n-alkanes; carbon isotope; paleo-vegetation; Qarhan Salt Lake

分类号:: P593

文献标志码:: A

摘要:: 对察尔汗盐湖ISL1A钻孔沉积物样品进行了有机分子地球化学分析, 检测出了丰富的类脂物, 包括正构烷烃、一元正脂肪酸、一元正脂肪醇等, 本文主要讨论正构烷烃类脂物的分布特征。正构烷烃的分布型式表明其来源于低等菌藻类生物和陆生高等植物, 正构烷烃的高碳数部分均有显著的奇偶优势, 高碳数正构烷烃全部以C31 为主峰碳。正构烷烃分布特征表明在110.1~50.1 ka B.P.期间, 察尔汗盐湖地区为草原植被景观。对C27、C29、C31 长链正构烷烃进行了单体碳同位素测定, 利用二元模式估算了C3 和 C4 植物的相对输入贡献, 结果表明, 以C3 植物为主。

Abstract:: Molecular biomarkers, including n-alkanes, n-alcohols and n-alkanoic acids, were identified in the core sediments taken from the Qarhan Salt Lake by GC/MS analysis. The distribution of n-alkanes was mainly discussed in this paper. The n-alkanes exhibited strong odd-over-even carbon number predominance and the main peak at C31, suggesting that they were derived from terrestrial higher plants. The distribution of n-alkanes indicated that the grass vegetation was dominated in the Qarhan Salt Lake area during 110.1 ka B.P. to 50.1 ka B.P. In addition, the compound-specific carbon isotopic composition was determined for C27, C29 and C31 n-alkanes in the core. Relative contribution of C3 and C4 plants was estimated by using a binary model, indicating that C3 plants are a dominantinput.

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备注/Memo

基金项目：中国科学院有机地球化学国家重点实验室开放基金资助项目（OGL-200811）作者简介：郭金春（1974-），男，博士，环境地球化学专业。E-mail：guojchny@126.com（Corresponding author）：HU Jian-fang, E-mail：hujf@gig.ac.cn, Tel：＋86-20-85290191

更新日期/Last Update: 2010-12-20