Burnham, Antony DBerry, AndrewWood, Bernard J.Cibin, Giannantonio2015-12-130009-2541http://hdl.handle.net/1885/78278Niobium K-edge and tantalum LIII-edge XANES spectra were recorded for silicate glasses quenched from melts equilibrated at oxygen fugacities (in log units relative to the iron-wüstite buffer) ranging from IW+6.7 to IW-4.3 at 1400-1650°C and atmosphericKeywords: Arc signature; Oxidation state; Oxygen fugacity; Silicate melts; XANES; Atmospheric pressure; Oxidation; Silicates; Structural geology; Tantalum; Niobium; fugacity; igneous geochemistry; mantle source; niobium; oxidation; P-T conditions; silicate melt; ta Arc signature; Niobium paradox; Oxidation state; Oxygen fugacity; Silicate melt; XANES201210.1016/j.chemgeo.2012.09.0022016-02-24