Evidence for an Oceanic Mg+2 Sink in Nearshore Tropical Sediments: New Constraints from the Li Isotopic Composition of Clays and Iron Oxyhydroxides

该项目包括测量粘土和氢氧化物的锂同位素组成，以评估拟议的海洋镁沉没在近岸海洋沉积物中的意义。该项目与利用锂作为地下水示踪剂和测定粘土矿物上锂同位素分馏的研究有明显的联系。PIS顾问在锶同位素在陆地化学风化方面的应用以及土壤的主要元素和粘土矿物生成研究方面拥有丰富的专业知识。这些主题是本项目的关键组成部分。该项目不仅将回答一个悬而未决的地球化学问题，而且还将填补PIS当前地球化学背景中的一个空白。

0074182KuThe project involves measuring the Li isotopic composition of clays and oxyhydroxides to evaluate the significance of a proposed oceanic Mg+2 sink in nearshore marine sediments. The project has obvious links with studies using Li as a groundwater tracer and determining the Li isotope fractionation on clay minerals. The PIs advisor has considerable expertise in Sr isotope applications to terrestrial chemical weathering as well as major element and clay mineral generation studies of soils. These topics are key components in this project. This project will not only answer an outstanding geochemical question, but will also fill a void in the PIs current geochemical background.