Experimental study of the partitioning of Cu, Ag, Au, Mo and W among pyrrhotite and immiscible Fe-S-O and silicate melts

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dc.contributor.advisorCandela, Philip Aen_US
dc.contributor.advisorPiccoli, Philip Men_US
dc.contributor.authorMengason, Michael Jamesen_US
dc.contributor.departmentGeologyen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2007-09-28T15:03:23Z
dc.date.available2007-09-28T15:03:23Z
dc.date.issued2007-08-14en_US
dc.description.abstractPartition coefficients have been determined for several transition metals amongst a rhyolitic silicate melt, pyrrhotite, and an immiscible Fe-S-O melt. Two sets of experiments were performed in sealed silica tubes at 1035°C-1045°C, FMQ-NNO O2, and logS2 ~1 bar, and analyzed by EMPA and LA-ICP-MS. Experiments yielded D<sup>Fe-S-O/melt</sup> ±1σ(mean) for Au =300±100, Ag =120±20, Cu >200, Mo =90±10 and W =9±3, and D<sup>po/melt</sup> for Au =120±50, Ag =58±8, Cu >200, Mo =35±3 and W =1.2±0.6x10-3. Some preliminary data are also presented on the partitioning of Si, Ti, V, Co, Zn, Re, Th and U. Modeling predicts the loss to a daughter melt of up to 50% of the initial Au, >37% Cu, 24% Ag, 19% Mo, and 2% W when Fe-S-O melts are removed with other cumulate phases during fractionation. This would reduce the metal available to potential intrusion-related hydrothermal ore deposits.en_US
dc.format.extent8484309 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/7401
dc.language.isoen_US
dc.subject.pqcontrolledGeologyen_US
dc.subject.pqcontrolledGeochemistryen_US
dc.subject.pquncontrolledImmiscible Fe-S-O melten_US
dc.subject.pquncontrolledpartition coefficientsen_US
dc.subject.pquncontrolledrhyoliteen_US
dc.subject.pquncontrolledporphyry ore depositen_US
dc.subject.pquncontrolledCuen_US
dc.subject.pquncontrolledAgen_US
dc.subject.pquncontrolledAuen_US
dc.subject.pquncontrolledMoen_US
dc.subject.pquncontrolledWen_US
dc.subject.pquncontrolledarc magmatic sulfidesen_US
dc.titleExperimental study of the partitioning of Cu, Ag, Au, Mo and W among pyrrhotite and immiscible Fe-S-O and silicate meltsen_US
dc.typeThesisen_US

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