Study Of Fullerenes And Sulfur Isotope In The Strata Near The Permian-Triassic Boundary In The Meishan Section

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.