【作者】 张俊；

【导师】 梁汉东；

【作者基本信息】 中国矿业大学（北京） ， 环境科学， 2010， 博士

【摘要】 本文主要以煤山剖面二叠系-三叠系(P-T)界线附近地层为研究对象。一方面,通过二次抽提方法,系统研究了煤山剖面P-T界线附近地层中的富勒烯和高富勒烯的赋存规律。另外,对比研究了全球多个地质样品中的天然富勒烯。该工作为解决天然富勒烯在地质事件界线中是否存在的争议提供了重要的实验数据。同时,本文还对人工合成的石墨烟灰中高富勒烯进行了HPLC分离,并用HPLC和LDMS对分离的组分再次进行鉴定,证实了高富勒烯分子的存在,一定程度上排除了前人对地质高富勒烯存在的质疑。另一方面,本文对煤山剖面P-T界线地层中硫同位素进行了全面的研究,主要包括：煤山A剖面P-T界线上下地层高分辨的碳酸盐岩中硫酸盐(CAS)硫同位素变化曲线、界线粘土中的草莓状黄铁矿及其硫同位素。结合这两方面者研究,作者试图从硫同位素地球化学角度,解释二叠系-三叠系生物灾变事件的原因和过程。更多还原

【Abstract】 In this study, the author carried out a series of investigation for the strata near the Permian-Triassic boundary in Meishan Section. Based on two-step extraction method, the author thoroughly examined natural fullerene and higher fullerenes in the strata near boundary event layer. In contrast to Meishan’s sample, some other geologic samples were also studied for natural fullerenes. The result offer the important experimental date for the controversy if natural fullerenes exist in geologic event boundary. Moreover, higher fullerenes in synthetic "Graphitic Smkes" (GS) soot were isolated using Cosmosil Buckysep column (250 x 10mm). The fractions isolated were then determined by both HPLC and LDMS. The result proves the existence of higher fullerenes and excludes the previous suspicion to some extent. On the other hand, the authors investigated stratigraphic profile of sulfur isotope near the Permian-Triassic boundary in Meishan Section, including:a high resolution sulfur isotope curve of CAS across the Permian-Triassic boundary in Meishan Section A; characterization and sulfur isope of framboidal pyrite in the Permian-Triassic boundary clay. According to the result of sulfur isotope, the author tried to explain the cause and process of the catastrophic event during the Permian-Triassic transitional period.更多还原