New type of epithermal manganese mineralization from the Banská Hodruša precious and base metal deposit at the Rozália mine, Hodruša-Hámre, Slovakia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F23%3A10136543" target="_blank" >RIV/00023272:_____/23:10136543 - isvavai.cz</a>

Result on the web

<a href="http://www.jgeosci.org/content/jgeosci.376_Rybarik.pdf" target="_blank" >http://www.jgeosci.org/content/jgeosci.376_Rybarik.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.376" target="_blank" >10.3190/jgeosci.376</a>

Result language

angličtina

Original language name

New type of epithermal manganese mineralization from the Banská Hodruša precious and base metal deposit at the Rozália mine, Hodruša-Hámre, Slovakia

Original language description

The newly discovered unusual epithermal manganese mineralization was found at the 18th level of the Rozalia mine in the Stiavnica stratovolcano and it is hosted by a NE-SW oriented fault dipping 55 degrees to SE. Based on its structural setting and cross-cut relationship to a pre-caldera vein it belongs to a large system of post-caldera veins related to horst uplift in the central zone of the stratovolcano. The vein occurs in andesite and consists of two contrasting parts, including a part dominated by white coarse-grained calcite and Mn-rich part represented by abundant johannsenite, younger rhodonite and Mn-carbonates (rhodochrosite, Mn-calcite), in association with minor quartz, calcite, adularia, chlorite, and clino-zoisite. Ore minerals are represented by sphalerite, galena, pyrite, chalcopyrite and rare inclusions of acanthite and can be found exclusively in the Mn-rich part of the vein. Johannsenite forms greenish-blue, greenish-brown or brown radial aggregates reaching up to 7 cm in size. Its average empirical formula is Ca0.96(Mn0.97Mg0.07Fe0.03)1.07(Si1.98Al0.02)2.00O6. Rhodonite shows a significant compositional variation of Ca and Mn contents, ranging from Ca0.48Mn4.56(Si5O15) to Ca1.58Mn3.41(Si5O15) as well as minor amounts of Fe (up to 0.32 apfu), Mg (up to 0.14 apfu) and Al (0.06 apfu). Micro -thermometry of fluid inclusions hosted by johannsenite, rhodonite, sphalerite, calcite and Mn-calcite determined that the mineralization precipitated from fluids of low salinity (1.4 to 5.3 wt. % NaCl eq.) and moderate homogenization temperatures (187-318 degrees C), with a trend of simultaneous decrease in salinity and temperature, interpreted as mixing of fluids. Boiling of fluids was recorded in early calcite at temperatures from 275 to 279 degrees C, corresponding to pressure from 58 to 62 bars and paleodepth from 704 to 752 m.

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

2023

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

68

Issue of the periodical within the volume

3

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

16

Pages from-to

213-228

UT code for WoS article

001125566400006

EID of the result in the Scopus database

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