Further information on publisher's website:http://dx.doi.org/10.1016/j.gca. 2008.11.036 Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Geochimica et Cosmochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Geochimica et Cosmochimica Acta, 73 (5), 2009Acta, 73 (5), , 2009Acta, 73 (5), , 10.1016Acta, 73 (5), /j.gca.2008 Additional information:
Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. has not significantly changed the concentrations of the PGE, except Pd which is severely 32 depleted in gabbroic eclogites relative to gabbros (~75% loss). In contrast, basaltic eclogites 33 display significant depletion of Pt (≥60%), Pd (>85%) and Re (50-60%) compared with 34 published MORB, while Os, Ir and Ru abundances are broadly comparable. Thus, these data 35 suggest that only Pt, Pd and Re, and not Os, Ir and Ru, may be significantly fluxed into the 36 mantle wedge from mafic oceanic crust. Re-Os model ages for gabbroic and gabbroic 37 eclogite minerals are close to age estimates for igneous crystallisation and high-pressure 38 metamorphism, respectively, hence the HSE budgets can be related to both igneous and 39 metamorphic behaviour. The gabbroic budget of Os, Ir, Ru and Pd (but not Pt) is dominated 40 by sulphide, which typically hosts >90% of the Os, whereas silicates account for most of the 41Re (with up to 75% in plagioclase alone