Ellwood, Michael JKelly, MichelleMaher, WilliamDe Deckker, Patrick2015-12-070012-821Xhttp://hdl.handle.net/1885/26297Measurements of germanium (Ge) in deep-sea sponge skeletons are presented for sponges collected by dredge and for spicules isolated from a range of deep-sea sediment cores. Germanium to silicon (Si) ratios (Ge/Sisp) for sponge silica ranged between 0.075Keywords: Germanium incorporation; Silicon concentrations; Sponge spicules; Fractionation; Germanium; Isotopes; Mathematical models; Seawater; Sediments; Silicon; Oceanography; fractionation; germanium; seawater; silicon; sponge Ge/Si fractionation; Germanium; Silicon; Southern Ocean; Sponge200610.1016/j.epsl.2006.01.0162015-12-07