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| 生物标志化合物与相关的全球变化 | |
| 引用本文： | 谢树成,梁斌,郭建秋,易轶,R.P.Evershed,D.Maddy,F.M.Chambers.生物标志化合物与相关的全球变化[J].第四纪研究,2003,23(5):521-528. |
| 作者姓名： | 谢树成 梁斌 郭建秋 易轶 R.P.Evershed D.Maddy F.M.Chambers |
| 作者单位： | 1. 中国地质大学地球科学学院,武汉,430074 2. School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK 3. Department of Geography, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK 4. Department of Geography and Geology, University of Gloucestershire, Francis Close Hall, Swindon Road, Cheltenham, GL50 4AZ, UK |
| 基金项目： | 国家自然科学基金项目 (批准号 :40 2 72 0 5 3和 40 2 3 2 0 2 5 )，湖北省青年杰出人才基金项目 (批准号 :2 0 0 2AC0 0 9)资 助 |
| 摘 要： | 在各种地质体中广泛分布的生物标志化合物在全球变化研究中有着广泛应用,特别是在海洋和湖泊沉积物中,研究工作已涉及到古植被、古温度、古降水量、古大气CO2浓度和古季风等的恢复.文章介绍利用气相色谱仪、气相色谱-质谱联用仪、气相色谱-热转换-同位素比质谱仪分析了一个长40cm泥炭岩芯(约222年)的生物标志化合物的分布及其单体氢同位素.结果显示,不管是生物标志化合物的分布,还是其单体稳定同位素特征都记载了气候(温度)的变化.正构脂肪酸的碳优势指数(CPI值)、正构烷烃C23/C31比值、正构烷烃C23的δD值与温度有很好的对应关系. |
| 关 键 词： | 分子化石 单体稳定同位素 全球变化 |
| 收稿时间： | 2003-04-06 |
| 修稿时间： | 2003年4月6日 |
BIOMARKERS AND THE RELATED GLOBAL CHANGE |
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| Institution: | Faculty of Earth Science, China University of Geosciences, Wuhan 430074; School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK; Department of Geography, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK; Department of Geography and Geology, University of Gloucestershire, Francis Close Hall, Swindon Road, Cheltenham, GL50 4AZ, UK |
| Abstract: | Biomarkers occurring at a variety of geological environments have been shown to be effective in the exploitation of past global changes. Reconstructions of paleo vegetation, paleo temperature, paleo precipitation, paleo atmospheric CO2 concentration, paleo monsoon were conducted in various sediments using the distributions and isotopic compositions of biomarkers. Here we present a 40cm long peat record based on the analyses of biomarker distribution and compound specific δ D using gas chromatography (GC), GC mass spectrometry (MS) and GC thermal conversion isotope ratio MS. The preliminary result shows that both the distribution and isotope composition of biomarkers are capable of reflecting the variations of paleoclimate. Specifically, The profile trends of the carbon preference index of n alkanoic acids, the ratio of C 23 /C31 n alkanes and δ D of C 23 n alkane are comparable with the documented temperature record of the period the peat core spans. |
| Keywords: | molecular fossils compound specific isotope global change |
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