祁连山七一冰川区表层沉积物中生物标志化合物的组成特征及来源研究  

Composition and sources of biomarkers from surface sediment in Qiyi glacier,Qilian Mountains

作　　者：李全莲[1] 王宁练[1] 武小波[1] 蒲健辰[1] 贺建桥[1] 蒋熹[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,冰冻圈科学国家重点实验室,甘肃兰州730000

出　　处：《地球化学》2008年第6期533-541,共9页Geochimica

基　　金：国家杰出青年科学基金项目(40525001);国家重点基础研究发展计划项目(2005CB422003);中国科学院创新团队国际合作伙伴计划项目(CXTD-Z2005-2);国家自然科学基金项目(40801023,40771046)

摘　　要：利用GC和GC-MS的分析方法,对祁连山七一冰川冰雪不溶微粒、冰尘和七一冰川流域表层土壤中的烷烃、脂肪酸、脂肪酸甲酯和长链酯、酮以及多环芳烃等生物标志化合物进行了分析,研究了它们的组成和分布特征,讨论了它们的环境地球化学意义。结果表明,生物标志化合物分布特征组成和分布特征指示了七一冰川地区的有机质具有藻类、高等植物、化石燃料燃烧产物等多种来源。冰雪不溶微粒和七一冰川流域表层土壤中有机物的来源相似,且这两种介质中的有机污染物种类多于冰尘,表明快速的工业化已经对七一冰川及其周围环境产生明显影响。Alkanes, fatty acid, fatty acid methyl ester, long chain esters, ketones, polycyclic aromatic hydrocarbons and others biomarkers in ice snow insoluble particles, cryoconite and surface soil around Qiyi glacier, Qilian Mountains were identified by GC and GC-MS. The compositions of these biomarkers were studied and their environmental geochemical significances were discussed. The results indicated that organic matters in this area mainly derived from oceanic algae, bacteria, higher plants, fossil fuels. Ice snow insoluble particles and surface soil around Qiyi glacier came from the similar sources, the species of organic matters in these two mediums were more than that of cryoconite. This showed that fast industrialization had an impact on Qiyi glacier and its circumference environment.

关 键 词：七一冰川 生物标志化合物 物质来源 化石燃料 饱和烃 祁连山 

分 类 号：P593[天文地球—地球化学]