A New Porphyry Mo Mineralization at Aisymi-Leptokarya, South-Eastern Rhodope, North-East Greece: Geological and Mineralogical Constraints

A New Porphyry Mo Mineralization at Aisymi-Leptokarya, South-Eastern Rhodope, North-East Greece: Geological and Mineralogical Constraints

A new porphyry Mo prospect has been discovered in the Aisymi-Leptokarya area, along the southern margin of the Byala Reka–Kechros metamorphic dome, south-eastern (SE) Rhodope metallogenic zone. The study area is dominated by an Oligocene felsic dike complex, which hosts the porphyry Mo mineralizatio...

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Bibliographic Details
Published in:Geosciences (Basel) Vol. 8; no. 12; p. 435
Main Authors: Galanopoulos, Evangelos, Voudouris, Panagiotis, Mavrogonatos, Constantinos, Spry, Paul, Hart, Craig, Melfos, Vasilios, Zaccarini, Federica, Alfieris, Dimitrios
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-12-2018
Subjects:
Aisymi-Leptokarya
Anomalies
Arc deposition
Bismuth
Earth science
Eocene
Feldspars
Galena
Geochemistry
Heavy metals
Isotopes
Laboratories
Metallogenesis
Metals
Mineralization
Mineralogy
Molybdenite
Molybdenum
Oligocene
Petrology
Plutons
Porphyry Μο
Pyrite
Quartz
Rock intrusions
Sandstone
Silver
Subduction
Subduction (geology)
Sulfidation
Thrace-Greece
Tin
Trace elements
Veins (geology)
Thrace
Greece
Canada
China
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Summary:A new porphyry Mo prospect has been discovered in the Aisymi-Leptokarya area, along the southern margin of the Byala Reka–Kechros metamorphic dome, south-eastern (SE) Rhodope metallogenic zone. The study area is dominated by an Oligocene felsic dike complex, which hosts the porphyry Mo mineralization and intrudes into upper Eocene sandstones-marls and the Leptokarya monzodiorite pluton. The Aisymi-Leptokarya felsic dike complex displays a rhyodacitic to dacitic composition with post-collisional affinities. The porphyry Mo mineralization occurs in the form of porphyry-style quartz stockworks in the felsic dike complex associated with potassic alteration characterized by hydrothermal K-feldspar. The ore minerals consist mainly of pyrite, molybdenite, kesterite, bismuthinite and galena within both the stockwork and the rock matrix. Bulk ore analyses indicate enrichment in Mo (up to 215 ppm), Se (up to 29 ppm), Bi (up to 8 ppm) and Sn (up to 14 ppm) in the porphyry quartz veins. Late-stage, north-east (NE-) and north-west (NW-)trending milky quartz intermediate-sulfidation epithermal veins with base metals, crosscut previous vein generations and are characterized by Ag, Sn and Te anomalies. The Aisymi-Leptokarya porphyry Mo prospect is set in a back-arc geotectonic regime and shares similarities to other post-subduction porphyry molybdenum deposits elsewhere.
ISSN:2076-3263
2076-3263
DOI:10.3390/geosciences8120435