Mechanisms of Organic Matter Preservation in Marine Sediments: A Focus on Black Carbon and Nonextractable Alkyl Components

在这个项目中，华盛顿大学的一位海洋有机地球化学家将继续他长期以来对海洋沉积物中主要有机质形式、分布和保存的研究。具体来说，这个项目有三个主要目标。研究小组的主要计划是结合固态13C核磁共振和其他技术，对大块沉积有机物质进行表征。将作出特别努力，调查世界各地海洋沉积物中丰富的“黑碳”和有机氮的性质；尽管它们无处不在，但两者都是出了名的难以研究。其次，研究小组将研究沉积有机质与氧气反应的形式和反应。最后，完成了一种新的单宁酸分子测量方法。这样的研究对于理解碳是如何在今天的海洋中循环的，以及在埋藏、隆起、再暴露于风化和人类开采的更长的地质背景下是很重要的。

ABSTRACTOCE-0002391In this project, an marine organic geochemist at the University of Washington will continue his long-time program of research into the forms, distributions and preservation of major forms of organic matter in marine sediments. In particular, this present project has three major goals. In its principal initiative, the research team will characterize bulk sedimentary organic material by a combination of solid-state 13C NMR and other techniques. A special effort will be made to investigate the nature of the "black carbon" and the organic nitrogen abundant in sediments throughout the world ocean; despite their ubiquity, both are notoriously difficult to study. Secondly the team will study the forms and reactions of sedimentary organic matter that react with oxygen. Finally, a new molecular method for measuring tannins in the environment will be finished. Such studies are important for understanding how carbon is cycled in the present day ocean as well as in the longer geological context of burial, uplift, and re-exposure to weathering and exploitation by humans.