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

[00:74 . 182]该项目包括测量粘土和氢氧化物的Li同位素组成，以评估近岸海洋沉积物中拟议的海洋Mg+2汇的重要性。该项目与利用Li作为地下水示踪剂和测定粘土矿物上Li同位素分异的研究有明显的联系。PIs顾问在Sr同位素应用于陆地化学风化以及土壤主要元素和粘土矿物生成研究方面具有相当的专业知识。这些主题是本项目的关键组成部分。该项目不仅回答了一个突出的地球化学问题，而且填补了PIs目前地球化学背景的空白。

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.