Bonanza-type epithermal Ag-Au mineralisation in Nová Baňa (Western Carpathians, Slovakia)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F25%3A10136952" target="_blank" >RIV/00023272:_____/25:10136952 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0169136825000538" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0169136825000538</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.oregeorev.2025.106493" target="_blank" >10.1016/j.oregeorev.2025.106493</a>
Alternative languages
Result language
angličtina
Original language name
Bonanza-type epithermal Ag-Au mineralisation in Nová Baňa (Western Carpathians, Slovakia)
Original language description
The Miocene bonanza-type epithermal mineralisation Sibenicny vrch is located in the western part of the historic Nova Bana deposit on the western slope of the Stiavnica stratovolcano. In the near-surface primary samples, bonanza accumulations contain up to 1700 ppm Ag and 283 ppm Au, while the Cu content does not exceed 59 ppm. This unusual geochemical signature, where Au exceeds Cu, Pb, or Zn, led to formation of unique mineral association in the studied samples. In this work, we focus on this mineral assemblage and its formation. The bonanza ores are banded, with rhythmically alternating chalcedony, quartz with enclosed adularia, and irregular accumulations of precious-metal minerals. The mineral assemblage hosted in the near-surface samples comprises pyrite, rozhdestvenskayaite-(Zn), zvestovite-(Zn), zvestovite-(Fe), argentopolybasite, argentopearceite, auropolybasite, auropearceite, Au-Ag alloys, stephanite, selenostephanite, pyrargyrite, proustite, naumannite, uytenbogaardtite, iodargyrite, and bromargyrite. These minerals document high concentration of Au, Ag, Sb, As, Se, and S in the fluid, simultaneously with lack of Cu, Pb, and Zn. Some of these sulfides incorporated Au in their structure, even though under usual geochemical conditions, they would not do so. The deeper parts of the same vein (163-166 m below the current surface) are characterised by lower Au and Ag contents (<84 ppm Ag, <6.95 ppm Au) and the mineral assemblage of chalcopyrite, galena, sphalerite, Au-Ag alloys, polybasite, and pearceite. Ore-bearing colloform bands of chalcedony consist of various textures, predominantly mosaic, acicular/pseudoacicular, flamboyant, or moss textures. We assume that the genesis of these chalcedony forms is related to the fluid boiling. Crustiform quartz in the deeper parts of the vein is most likely related to fluid mixing.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10504 - Mineralogy
Result continuities
Project
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Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Ore Geology Reviews
ISSN
0169-1368
e-ISSN
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Volume of the periodical
178
Issue of the periodical within the volume
březen 2025
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
15
Pages from-to
1-15
UT code for WoS article
001430921800001
EID of the result in the Scopus database
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