Margarita Melfou

Aristotle University of Thessaloniki

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ΑT

Αlexandre Tarantola

Centre National de la Recherche Scientifique

Vasilios Melfos

Aristotle University of Thessaloniki

Panagiotis Voudouris

National and Kapodistrian University of Athens

Paul G. Spry

Moorfields Eye Hospital NHS Foundation Trust

Constantinos Mavrogonatos

University of Pisa

Reiner Klemd

Friedrich-Alexander-Universität Erlangen-Nürnberg

Karsten M. Haase

Friedrich-Alexander-Universität Erlangen-Nürnberg

Christophe Scheffer

Université Laval

Anna Schaarschmidt

Friedrich-Alexander-Universität Erlangen-Nürnberg

Lambrini Papadopoulou

National and Kapodistrian University of Athens

Cooperative Institutions

Centre National de la Recherche Scientifique

Université de Lorraine

National and Kapodistrian University of Athens

Institute of Geology and Mineral Exploration

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Aristotle University of Thessaloniki

Bureau de Recherches Géologiques et Minières

Centre de Recherches Pétrographiques et Géochimiques

University of British Columbia

TU Bergakademie Freiberg

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Porphyry and epithermal deposits in Greece: An overview, new discoveries, and mineralogical constraints on their genesis

Ore Geology Reviews (2019)

Panagiotis Voudouris Constantinos Mavrogonatos Paul G. Spry Tim Baker Vasilios Melfos

Massif

Back-arc basin

10.1016/j.oregeorev.2019.03.019

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Citations (49)

A mineralogical and geochemical assessment of the As-, Cu-, In-, Pb-, Sb-, and Zn-rich mine wastes at the Pefka epithermal deposit, Greece

Journal of Geochemical Exploration (2023)

Petr Drahota Agni Chatziantoniou Martin Mihaljevič Adam Culka Margarita Melfou

Metalloid

Sulfide Minerals

Ferrihydrite

Oxide minerals

10.1016/j.gexplo.2023.107336

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Citations (1)

Mineralogical Constraints on the Potassic and Sodic-Calcic Hydrothermal Alteration and Vein-Type Mineralization of the Maronia Porphyry Cu-Mo ± Re ± Au Deposit in NE Greece

Minerals (2020)

Vasilios Melfos Panagiotis Voudouris Margarita Melfou Matías G. Sánchez Lambrini Papadopoulou

The Maronia Cu-Mo ± Re ± Au deposit is spatially related to a microgranite porphyry that intruded an Oligocene monzonite along the Mesozoic Circum-Rhodope belt in Thrace, NE Greece. The magmatic rocks and associated metallic mineralization show plastic and cataclastic features at the south-eastern margin of the deposit that implies emplacement at the ductile-brittle transition, adjacent to a shear zone at the footwall of the Maronia detachment fault. The conversion from ductile to brittle deformation caused a rapid upward magmatic fluid flow and increased the volume of water that interacted with the host rocks through high permeable zones, which produced extensive zones of potassic and sodic-calcic alteration. Potassic alteration is characterized by secondary biotite + K-feldspar (orthoclase) + magnetite + rutile + quartz ± apatite and commonly contains sulfides (pyrite, chalcopyrite, pyrrhotite). Sodic-calcic alteration consists of actinolite + sodic-calcic plagioclase (albite/oligoclase/andesine) + titanite + magnetite + chlorite + quartz ± calcite ± epidote-allanite. The high-oxidation state of the magmas and the hydrothermal fluid circulation were responsible for the metal and sulfur enrichments of the aqueous fluid phase, an increase in O2 gas content, the breakdown of the magmatic silicates and the production of the extensive potassic and sodic-calcic alterations. Brittle deformation also promoted the rapid upward fluid flow and caused interactions with the surrounding host rocks along the high temperature M-, EB-, A- and B-type veins.

Cataclastic rock

Titanite

Breccia

10.3390/min10020182

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Citations (14)

Molybdenite Re-Os geochronology and conditions of formation of potassic and sodic-calcic alteration associated with the Plaka porphyry Mo-Cu system, Lavrion, Greece

Journal of Geochemical Exploration (2024)

Panagiotis Voudouris Vasilios Melfos Margarita Melfou Αlexandre Tarantola Max Frenzel

Geochronology

Molybdenite

10.1016/j.gexplo.2024.107609