Skip to Main Content
GEOREF RECORD

Rhenium enrichment in the Muratdere Cu-Mo (Au-Re) porphyry deposit, Turkey; evidence from stable isotope analyses (delta (super 34) S, delta (super 18) O, delta D) and laser ablation-inductively coupled plasma-mass spectrometry analysis of sulfides

Katie McFall, Stephen Roberts, Iain McDonald, Adrian J. Boyce, Jonathan Naden and Damon Teagle
Rhenium enrichment in the Muratdere Cu-Mo (Au-Re) porphyry deposit, Turkey; evidence from stable isotope analyses (delta (super 34) S, delta (super 18) O, delta D) and laser ablation-inductively coupled plasma-mass spectrometry analysis of sulfides
Economic Geology and the Bulletin of the Society of Economic Geologists (April 2019) Pre-Issue Publication

Abstract

The Muratdere Cu-Mo (Au) porphyry deposit in western Turkey contains elevated levels of rhenium and is hosted within granodioritic intrusions into an ophiolitic melange sequence in the Anatolian belt. The deposit contains several stages of mineralization: early microfracture-hosted molybdenite and chalcopyrite, followed by a quartz-pyrite-chalcopyrite vein set associated with Cu-Au grade, a quartz-chalcopyrite-pyrite-molybdenite vein set associated with Cu-Mo-Re grade, and a later polymetallic quartz-barite-sphalerite-galena-pyrite vein set. The rhenium in Muratdere is hosted within two generations of molybdenite: early microfracture-hosted molybdenite and later vein-hosted molybdenite. In situ laser ablation-inductively coupled plasma-mass spectrometry analysis of sulfides shows that the later molybdenite has significantly higher concentrations of Re (average 1,124 ppm, sigma = 730 ppm, n = 43) than the early microfracture-hosted molybdenite (average 566 ppm, sigma = 423 ppm, n = 28). Pyrite crystals associated with the Re-rich molybdenite have higher Co and As concentrations than those in other vein sets, with Au associated with As. The microfracture-hosted sulfides have delta (super 34) S values between -2.2 ppm and +4.6 ppm, consistent with a magmatic source. The vein-hosted sulfides associated with the high-Re molybdenite have a delta (super 34) S signature of 5.6 ppm to 8.8 ppm, similar to values found in peridotite lenses in the Anatolian belt. The later enrichment in Re and delta (super 34) S-enriched S may be sourced from the surrounding ophiolitic country rock or may be the result of changing redox conditions during deposit formation.


ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: Pre-Issue Publication
Title: Rhenium enrichment in the Muratdere Cu-Mo (Au-Re) porphyry deposit, Turkey; evidence from stable isotope analyses (delta (super 34) S, delta (super 18) O, delta D) and laser ablation-inductively coupled plasma-mass spectrometry analysis of sulfides
Affiliation: University of Southampton, National Oceanography Centre, Southampton, United Kingdom
Published: 20190429
Text Language: English
Publisher: Economic Geology Publishing Company, Lancaster, PA, United States
Number of pages: 24
References: 123
Accession Number: 2019-044653
Categories: Economic geology, geology of ore depositsIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sect., strat. cols., 2 tables, sketch maps
N36°04'60" - N42°01'60", E26°10'00" - E44°49'60"
Secondary Affiliation: Cardiff University, GBR, United KingdomScottish Universities Environmental Research Centre, GBR, United KingdomBritish Geological Survey, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, Copyright, Society of Economic Geologists. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201911
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal