REU: Geochemical Cycling of Sulfur and Associated Trace Element in Salt Marsh and Shelfbreak Sediments

这是一项研究硫循环之间的有机和 盐沼和陆架坡折沉积物中的无机储层。 研究的目的是了解 有机硫和无机硫在控制氧化还原循环中的作用 无机微量元素的含量。 稳定 硫同位素和天然放射性核素示踪剂（氡222 子系列）将用于探测化学过程 涉案 这项研究是基于预测， 黄铁矿的循环会导致那些微量元素 结合到黄铁矿中以被交替氧化， 降低 这项研究意义重大，不仅因为它 将有助于了解近岸硫成岩作用 沉积物，但也因为它将提高目前的知识， 跨越陆地-海洋边界的元素转移和对 从海洋环境到大气的硫通量。

This is a study of sulfur cycling between organic and inorganic reservoirs in salt marsh and shelf break sediments. The objectives of the research are to understand the roles of organic and inorganic sulfur in controlling the redox cycling of inorganic trace elements in these benthic domains. Stable sulfur isotopes and natural radionuclide tracers (the radon 222 daughter series) will be used to probe the chemical processes involved. The research is based on the prediction that the rapid cycling of pyrite will cause those trace elements that are incorporated into the pyrite to be alternately oxidized and reduced. The research is significant not only because it will provide understanding about sulfur diagenesis in nearshore sediments, but also because it will improve current knowledge of elemental transfer across the land-sea boundary and knowledge of the sulfur flux from the marine environment to the atmosphere.