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Book Chapter

Metallogeny of the Central Slovakian Volcanic Field: An Overview

By
Jaroslav Lexa
Jaroslav Lexa
Geological Survey of Slovak Republic, Mlynská.dol. 1, 817 04 Bratislava, Slovakia
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Published:
January 01, 1999

Abstract

The essential structural aspects and paleovolcanic reconstruction of the Central Slovakia Volcanic Field has been discussed by Konecný et al., (1995); their paper is reprinted in this volume. Volcanic rocks, especially central volcanic zones including subvolcanic intrusive complexes, host a number of mineral deposits and occurrences. Fourteen types of mineralization have been distinguished in this region (Fig. 1), including:

  1. Magnetite skarn deposits and occurences related to contacts of the granodiorite subvolcanic intrusion with Triassic limestones and dolomites.

  2. Porphyry/skarn copper ± molybdenum or gold deposits and occurrences related to granodiorite porphyry stocks and dike clusters emplaced in Triassic carbonate rocks.

  3. Porphyry copper ± molybdenum mineralogical occurrences related to diorite to monzodiorite stocks.

  4. Base metal stockwork/disseminated mineralization related to granodiorite and diorite porphyry intrusions.

  5. Barren high-sulfidation alteration systems related variably to granodiorite, diorite, monzodiorite, and granodiorite porphyry intrusions (stocks), possibly representing the tops of porphyry-type hydrothermal systems.

  6. A high-sulfidation epithermal gold deposit and occurrences related to diorite/monzodiorite stocks, showing rudimentary porphyry type mineralization at depth.

  7. A low-sulfidation epithermal gold deposit related to granodiorite subvolcanic intrusion, along with base metal stockwork/disseminated mineralization.

  8. Low-sulfidation epithermal veins situated in central zones of older stratovolcanoes; however, these are directly related to local horst uplifts and late-stage rhyolitic extrusive domes and dikes. On the basis of metal contents there are base metal, silver — base metal and precious metal epithermal veins. Where these veins coexist there is a zonation in metals.

  9. Base-metal replacement deposit and occurrences adjacent to base-metal epithermal veins in Triassic carbonate rocks.

  10. Precious-metal replacement

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Contents

Society of Economic Geologists Guidebook Series

Epithermal Mineralization of the Western Carpathians

Ferenc Molnár
Ferenc Molnár
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Jaroslav Lexa
Jaroslav Lexa
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Jeffrey W. Hedenquist
Jeffrey W. Hedenquist
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Society of Economic Geologists
Volume
31
ISBN electronic:
9781934969847
Publication date:
January 01, 1999

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