(Table 1) Sample description and tetrapyrrole pigment yield at DSDP Leg 60 Holes

In order to provide a better understanding of the fate of sedimentary chlorophyll and chlorophyll degradation products in all kinds of environments, we have recently expanded our studies to include examination of sediments returned from Legs which are not rich in organic matter, nor are even primarily biogenic. Eight core samples from the Mariana Basin and Trench, obtained from DSDP Leg 60, were analyzed for products of chlorophyll diagenesis. To date, the sediment samples from the South Philippine Sea have been the most organically barren examined. Through elimination of the bias of examining only sediments rich in organic matter, we hope that the fate of chlorophyllous material on a more global scale will eventually be elucidated.为更深入地阐明沉积叶绿素及其降解产物在各类环境中的归趋，我们近期拓展了研究范围，将分析对象拓展至非富有机质、甚至主要并非生物成因的钻探航次回收沉积物。本研究针对深海钻探计划（Deep Sea Drilling Project, DSDP）第60航次采集自马里亚纳海盆与海沟的8个岩芯样品，开展了叶绿素成岩作用产物的分析测试。截至当前，南菲律宾海的沉积物样品为我们所分析过的有机质含量最为贫乏的样品。通过规避仅针对富有机质沉积物开展研究带来的分析偏倚，我们期望最终明确全球尺度下叶绿素类物质的地球化学归趋。