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Rhenium Enrichment in the Muratdere Cu-Mo (Au-Re) Porphyry Deposit, Turkey: Evidence from Stable Isotope Analyses (δ34S, δ18O, δD) and Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry Analysis of Sulphides

Title	Rhenium Enrichment in the Muratdere Cu-Mo (Au-Re) Porphyry Deposit, Turkey: Evidence from Stable Isotope Analyses (δ34S, δ18O, δD) and Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry Analysis of Sulphides
Authors	Katie McFall, Stephen Roberts, Iain McDonald, Adrian J. Boyce, Jonathan Naden, Damon Teagle
Magazine	Economic Geology
Date	11/01/2019
DOI	10.5382/econgeo.4638
Introduction	The Muratdere Cu-Mo (Au) porphyry deposit in western Turkey is notable for its high rhenium content, situated within granodioritic intrusions in an ophiolitic mélange sequence of the Anatolian belt. This deposit showcases multiple mineralization stages, including early microfracture-hosted molybdenite and chalcopyrite, followed by veins containing quartz, pyrite, and chalcopyrite linked to Cu-Au grades, and veins with quartz, chalcopyrite, pyrite, and molybdenite associated with Cu-Mo-Re grades. A later polymetallic vein set includes quartz, barite, sphalerite, galena, and pyrite. Rhenium predominantly occurs in two molybdenite generations: early microfracture-hosted and later vein-hosted molybdenite. In situ laser ablation-inductively coupled plasma-mass spectrometry on sulfides indicates that later molybdenite exhibits significantly higher Re concentrations (average 1,124 ppm) compared to the early microfracture-hosted molybdenite (average 566 ppm). Pyrite crystals associated with Re-rich molybdenite also show elevated Co and As levels, with Au linked to As. Sulfides in microfractures have δ34S values between −2.2‰ to +4.6‰, indicative of a magmatic source, whereas vein-hosted sulfides with high-Re molybdenite show δ34S signatures of 5.6‰ to 8.8‰, akin to Anatolian belt peridotite lenses. The later Re and δ34S enrichment could originate from surrounding ophiolitic rocks or result from redox condition changes during deposit formation.
Quote	Katie McFall, Stephen Roberts and Iain McDonald et al. Rhenium Enrichment in the Muratdere Cu-Mo (Au-Re) Porphyry Deposit, Turkey: Evidence from Stable Isotope Analyses (δ34S, δ18O, δD) and Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry Analysis of Sulfides. Economic Geology. 2019. Vol. 114(7):1443-1466. DOI: 10.5382/econgeo.4638
Element	Copper (Cu) , Molybdenum (Mo) , Sulfur (S) , Arsenic (As) , Cobalt (Co)
Materials	Metals and Alloys , Chemical Compounds
Topics	Catalytic Materials

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