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| 西藏纳木错表层沉积物中正构烷烃的来源与空间分布特征 | |
| 引用本文： | 林晓,朱立平,王君波,汪勇,甄晓林,鞠建廷,谢曼平,彭萍.西藏纳木错表层沉积物中正构烷烃的来源与空间分布特征[J].湖泊科学,2009,21(5):654-662. |
| 作者姓名： | 林晓 朱立平 王君波 汪勇 甄晓林 鞠建廷 谢曼平 彭萍 |
| 作者单位： | 1. 中国地质大学生物地质与环境地质教育部重点实验室,武汉,430074;中国科学院青藏高原研究所,北京,100085 2. 中国科学院青藏高原研究所,北京,100085 3. 中国科学院青藏高原研究所,北京,100085;中国科学院研究生院,北京,100049 4. 《中国科学》杂志社,北京,100717 |
| 基金项目： | 国家重点基础研究发展计划项目，国家自然科学基金项目，中国地质大学(武汉)优秀青年教师计划 |
| 摘 要： | 通过测定纳木错现代植物和表层沉积物样品中的正构烷烃,结合主成分分析方法,明确了表层沉积物中烷烃的主要来源,并初步分析了它们在湖泊中的空间分布特征.研究结果显示,沉水植物所含烷烃以n-C21-C25为主,具有n-C23的峰值;陆生植物主要含n-C27-C33烷烃,具有n-C29或n-C31的峰值;但垫状点地梅(Androsace tapete)和香柏(Sabina pingii)的主峰碳却是n-C33烷烃,这在以往研究中鲜有报道.在纳木错表层沉积物中,正构烷烃具有典型的n-C31和n-C23双峰分布形式,来源于低等菌藻类、沉水植物以及陆生植物,其中碳数小于C20的短链烷烃主要来源于低等菌藻类,其空间分布均一,由低等菌藻类的浮游生活型所决定;长链烷烃主要来源于高等植物,含量从滨岸到湖中心逐渐减少,这与其在运移和沉积过程中受微生物的持续降解作用有关,此外,来源于陆生植物的n-C27-C33烷烃因河流汇水面积和流量不同而存在空间差异,这值得重视和进一步研究. |
| 关 键 词： | 表层沉积物 正构烷烃 空间分布 纳木错 青藏高原 |
| 收稿时间： | 2008/10/18 0:00:00 |
| 修稿时间： | 2009/2/19 0:00:00 |
Sources and spatial distribution character of n-alkanes in surface sediments of Nam Coon the Tibetan Plateau |
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| LIN Xiao,ZHU Liping,WANG Junbo,WANG Yong,ZHEN Xiaolin,JU Jianting,XIE Manping and PENG Ping.Sources and spatial distribution character of n-alkanes in surface sediments of Nam Coon the Tibetan Plateau[J].Journal of Lake Science,2009,21(5):654-662. | |
| Authors: | LIN Xiao ZHU Liping WANG Junbo WANG Yong ZHEN Xiaolin JU Jianting XIE Manping and PENG Ping |
| Institution: | 1: Key Laboratory of Biogeology and Environmental Geology of Ministry of Education;China University of Geosciences;Wuhan 430074;P.R.China;2: Institute of Tibetan Plateau Research;Chinese Academy of Sciences;Beijing 100085;P.R.China;3: Graduate University of CAS;Beijing l00049;P.R.China;4: Science in China Press;Beijing 100717;P.R.China |
| Abstract: | Aquatic and land plants as well as surface sediments from Nam Co in Tibetan Plateau were collected and n-alkanes analysis had been conducted to identify the sources and spatial distribution of these molecular. The results indicated that n-alkanes ranging from 21 to 25 were identified to be derived from submerged plants, while n-alkanes ranging from 27 to 33 with n-C29 or n-C31 peak were derived from land plants except Androsace tapete and Sabina pingii. These two species contain n-alkanes with n-C33 peak wh... |
| Keywords: | Surface sediments n-alkane spatial distribution Nam Co Tibetan Plateau |
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