Skip to Main Content
Book Chapter

Hydrothermal fluids in epithermal and porphyry Au deposits in the Central Slovakia Volcanic Field

By
Peter Koděra
Peter Koděra
1
Department of Geology of Mineral Deposits, Faculty of Natural Sciences, Comenius University, Mlynská dolina, 842 15 Bratislava, Slovakia
Search for other works by this author on:
Jaroslav Lexa
Jaroslav Lexa
2
Geological Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia
Search for other works by this author on:
Anthony E. Fallick
Anthony E. Fallick
3
Scottish Universities Environmental Research Centre, East Kilbride, Glasgow, G75 0QF, UK
Search for other works by this author on:
Markus Wälle
Markus Wälle
4
Department of Earth Sciences, ETH Zürich, 8092 Zürich, Switzerland
Search for other works by this author on:
Adrián Biroň
Adrián Biroň
5
Geological Institute, Slovak Academy of Sciences, Severná 5, 974 01 Banská Bystrica, Slovakia
Search for other works by this author on:
Published:
January 01, 2014

Abstract

The Neogene Central Slovakia Volcanic Field in the Carpathian arc contains various Au deposits, hosted by central zones of large andesite stratovolcanoes. Fluids involved in mineralization have been studied at three different types of deposit, mostly by fluid inclusion and stable isotope techniques. The Rozália mine in the Štiavnica stratovolcano hosts intermediate sulphidation-style Au–Ag epithermal mineralization in subhorizontal veins related to hydrothermal activity during an early stage of caldera collapse. Associated fluids of low salinity underwent extensive boiling at 280–330 °C on transition from suprahydrostatic towards hydrodynamic conditions at shallow depths (c. 550 m) from fluids of mixed magmatic and meteoric origin. The Kremnica ore field hosts a large system of low sulphidation-style Au–Ag veins contemporaneous with rhyolite magmatism and situated on resurgent horst faults. Fluids were of low salinity, predominantly of meteoric origin, and showed gradual decrease in temperature along the system (c. 270–140 °C) related to a decrease in erosion level from c. 500 to c. 50 m. The Biely Vrch Au-porphyry deposit in the Javorie stratovolcano is associated with quartz stockwork in diorite porphyry intrusion. The major type of ore-bearing fluid was high temperature magmatic vapour (720–<380 °C) accompanied by Fe-rich salt melt. Gold precipitated in a high-temperature but low-pressure subvolcanic environment.

Supplementary material:

Stable isotope data and fluid inclusion microthermometric data are available at http://www.geolsoc.org.uk/SUP18752.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Special Publications

Gold-Transporting Hydrothermal Fluids in the Earth’s Crust

P. S. Garofalo
P. S. Garofalo
University of Bologna, Italy
Search for other works by this author on:
J. R. Ridley
J. R. Ridley
Colorado State University, USA
Search for other works by this author on:
Geological Society of London
Volume
402
ISBN electronic:
9781862396784
Publication date:
January 01, 2014

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal