Mineralogy and evolution of the epithermal mineralization in the Rudno nad Hronom-Brehy ore deposit, Stiavnicke vrchy Mts. (Slovakia)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F24%3A10136547" target="_blank" >RIV/00023272:_____/24:10136547 - isvavai.cz</a>

Result on the web

<a href="http://www.jgeosci.org/content/jgeosci_380_Vlasac.pdf" target="_blank" >http://www.jgeosci.org/content/jgeosci_380_Vlasac.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.380" target="_blank" >10.3190/jgeosci.380</a>

Result language

angličtina

Original language name

Mineralogy and evolution of the epithermal mineralization in the Rudno nad Hronom-Brehy ore deposit, Stiavnicke vrchy Mts. (Slovakia)

Original language description

The Rudno nad Hronom-Brehy ore deposit in Slovakia represents an important locality of epithermal precious metal mineralization in the Central Slovak Volcanic Field. The main ore structures in the area are Anna, Goldschram, Filip, Johan de Deo and Priecna veins. In this work, we present mineralogical, paragenetic and geochemical aspects of the ore mineralization, hydrothermal alteration patterns, fluid inclusions, isotopic composition of sulfur (delta S-34) and K-Ar age of ore mineralization. Four mineralization stages were recognized, the third one being split into two substages. (1) Pyrite stage with quartz, K-feldspar, arsenopyrite and pyrite. (2) Base-metal stage with sphalerite, galena, chalcopyrite, Au-Ag alloys and famatinite. (3a) Early Ag stage with tetrahedrite-(Zn), tetrahedrite-(Fe), argentotetrahedrite-(Zn), tetrahedrite-(Cd), argentotetrahedrite-(Cd) and greenockite. (3b) Late Ag stage with pyrargyrite, polybasite, pearceite, cupropolybasite, cupropearceite, acanthite and galena. (4) Late Ag-Cu stage with bornite, stromeyerite, mckinstryite, chalcocite, digenite, covellite and uytenbogaardtite. Veins are rich in silver with an average Ag : Au ratio of 85 : 1; in some parts of the veins, Ag content reaches up to 1950 ppm and Au up to 42.7 ppm. The neutral to alkaline style of hydrothermal alteration is represented by K-feldspar, quartz, carbonates, smectite, interstratified illite/smectite, and chlorite (clinochlore, chamosite). This assemblage indicates a low sulfidation origin of the mineralization formed at 177-224 degrees C. The delta S-34 values from the base-metal stage varies from + 2.8 to + 3.5 parts per thousand for chalcopyrite from the northern part of the Priecna vein, from + 1.9 to + 2.6 parts per thousand for galena, from + 4.9 to + 5.2 parts per thousand CDT for pyrite from the Anna vein. These values indicate a relatively homogeneous sulfur source, most likely related to an igneous or mixed igneous and host-rock source.

Czech name

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Czech description

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Type

J_imp - 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

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geosciences

ISSN

1802-6222

e-ISSN

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Volume of the periodical

69

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

27

Pages from-to

21-47

UT code for WoS article

001235690500003

EID of the result in the Scopus database

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