Utility of stable isotope system of tungsten as a paleocean redox proxy based on molecular structure

点击翻译按钮获取中文摘要

Adsorption on marine ferromanganese oxides is the important process controlling concentration and isotopic composition of tungsten (W) in modern oxic seawater. We focused on the enrichment and isotopic fractionation of W onto ferromanganese oxides by both structural analysis and isotope measurements. We revealed that W changes its molecular symmetry through inner-sphere complexation on the surface of both Fe (oxyhydr)oxides and Mn oxides, and also shows isotopic fractionation.