Mineralization processes in the central zone of the Banska Stiavnica stratovolcano (Slovakia) associated with a subvolcanic granodiorite pluton

TL;DRAbstract

The central zone of the Stiavnica stratovolcano (Western Carpathians) hosts an extensive subvolcanic intrusive complex, dominated by a granodiorite pluton (16.3- 15.5 Ma) (Lexa et al., 1999). The granodiorite intrusion locally forms apophyses at the margins associated with Fe-skarns, while in the central, apical part it contains an irregular network of fractures, hosting base metal mineralisation. In order to develop a complex genetic model for the mineralization processes, detailed geochemical, fluid inclusion and stable isotope research were undertaken on the intrusion and on related mineralisation & alteration.
\nThe granodiorite intrusion, especially the marginal facies, is altered.Geochemical studies show that subsolidus alteration, intimately related to the skarns, resulted in an apparent depletion in Fe[sub]total, MnO, Zn and an increase in CaO, MgO, Na[sub]2 O (± K[sub]2 O), Cu. Hydrothermal alteration, closely related to stockwork mineralisation, is characterised by an

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