The Geochemistry of Rare-Earth Elements in Estuarine and Coastal Waters

研究了新疆维吾尔自治区新疆维吾尔族自治区的稀土元素地球化学特征 河口和沿海沃茨、沉积物和孔隙沃茨 这是这次更新计划的重点。 的 切萨皮克湾和亚马逊河大陆架将是主要的 研究领域。 根据私家侦探的说法目前的赠款，通量， 稀土元素的循环和分馏作用主要发生在 河口带的地球化学扰动。 切萨皮克湾的结果表明，轻稀土元素作为 在溶解过程中富集在溶解相中， 深水盆地缺氧条件的发展。 在 拟议中的研究，一项在切萨皮克进行的时间序列研究 海湾季节性缺氧盆地（水柱和沉积物） 将进行量化的程度和动力学 这种通量和分馏。 培养试验 稀土元素成岩作用也将随之发生。 与大型多学科研究合作 还提出了亚马逊货架的（“AmasSeds”项目）。 对亚马逊河口的季节性研究将集中在 稀土元素在河口的迁移和矿化 沉积物中的沃茨和稀土成岩作用 铁和有机质的动态循环。 亚马逊 河口研究将提供急需的REE数据 一个主要的河流/河口系统。

The geochemistry of rare earth elements (REE) in estuarine and coastal waters, sediments, and pore waters in the main focus of this renewal proposal. The Chesapeake Bay and Amazon River shelf will be the main study areas. Based on the P.I.'s current grant, the flux, cycling and fractionation of REE undergo major biogeochemical perturbations in the estuarine zone. Results from the Cheseapeake Bay show that light REE as being enriched in the dissolved phase during the development of anoxic conditions in the deep basins. In the proposed research, a time-series study in a Chesapeake Bay seasonally anoxic basin (water column and sediments) will be carried out to quantify the extent and kinetics of such fluxes and fractionation. Incubation experiments will also follow the diagenesis of REE. Collaboration with a large multi-disciplinary study ("AmasSeds" project) of the Amazon shelf is also proposed. A seasonal study of the Amazon estuary will focus on the remineralization and removal of REE in the estuarine waters and REE diagenesis in the sediments associated with dynamic cycling of Fe and organic matter. The Amazon River estuary study will provide much needed data on REE for a major river/estuary system.