%0 Journal Article
%T Extremely Re-Rich Molybdenite from Porphyry Cu-Mo-Au Prospects in Northeastern Greece: Mode of Occurrence, Causes of Enrichment, and Implications for Gold Exploration
%A Panagiotis Voudouris
%A Vasilios Melfos
%A Paul G. Spry
%A Luca Bindi
%A Robert Moritz
%A Melissa Ortelli
%A Tamara Kartal
%J Minerals
%D 2013
%I MDPI AG
%R 10.3390/min3020165
%X Extremely Re-rich molybdenite occurs with pyrite in sodic每calcic, sodic每sericitic and sericitic-altered porphyritic stocks of granodioritic每tonalitic and granitic composition in the Sapes每Kirki每Esymi, Melitena and Maronia areas, northeastern Greece. Molybdenite in the Pagoni Rachi and Sapes deposits is spatially associated with rheniite, as well as with intermediate (Mo,Re)S 2 and (Re,Mo)S 2 phases, with up to 46 wt % Re. Nanodomains and/or microinclusions of rheniite may produce the observed Re enrichment in the intermediate molybdenite每rheniite phases. The extreme Re content in molybdenite and the unique presence of rheniite in porphyry-type mineralization, combined with preliminary geochemical data (Cu/Mo ratio, Au grades) may indicate that these deposits have affinities with Cu每Au deposits, and should be considered potential targets for gold mineralization in the porphyry environment. In the post-subduction tectonic regime of northern Greece, the extreme Re and Te enrichments in the magmatic-hydrothermal systems over a large areal extent are attributed to an anomalous source (e.g., chemical inhomogenities in the mantle-wedge triggered magmatism), although local scale processes cannot be underestimated.
%K molybdenite
%K rhenium
%K rheniite
%K porphyry
%K post-subduction
%K Greece
%U http://www.mdpi.com/2075-163X/3/2/165