Mineralogy and genetic considerations of the metamorphosed As-rich manganese ore mineralisation at the Diely occurrence near Poráč, Northern Gemeric Unit, Western Carpathians, Slovakia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F25%3A10136944" target="_blank" >RIV/00023272:_____/25:10136944 - isvavai.cz</a>

Result on the web

<a href="https://www.cambridge.org/core/journals/mineralogical-magazine/article/mineralogy-and-genetic-considerations-of-the-metamorphosed-asrich-manganese-ore-mineralisation-at-the-diely-occurrence-near-porac-northern-gemeric-unit-western-carpathians-slovakia/5175D156A3B6F3507A6F93B0F41F1D90" target="_blank" >https://www.cambridge.org/core/journals/mineralogical-magazine/article/mineralogy-and-genetic-considerations-of-the-metamorphosed-asrich-manganese-ore-mineralisation-at-the-diely-occurrence-near-porac-northern-gemeric-unit-western-carpathians-slovakia/5175D156A3B6F3507A6F93B0F41F1D90</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/mgm.2024.51" target="_blank" >10.1180/mgm.2024.51</a>

Result language

angličtina

Original language name

Mineralogy and genetic considerations of the metamorphosed As-rich manganese ore mineralisation at the Diely occurrence near Poráč, Northern Gemeric Unit, Western Carpathians, Slovakia

Original language description

The Diely occurrence of metamorphosed As-rich manganese mineralisation is located in the Spisš ko-gemerské rudohorie Mountains near the Poráč village and comprises Early Palaeozoic metamorphic rocks of the Gemeric Unit in the Western Carpathian region. Mineralisation is situated in the narrow tectonically delineated belt of Rakovec Group rocks consisting of mafic metavolcanic material generated during the back-arc submarine volcanic activity of the Early Ordovician-Silurian period. The Mn mineralisation is hosted in siliceous laminated lenses (metacherts) embedded in metabasalts and its tuffs. Manganese ore consists of quartz, braunite, rhodonite, nambulite, rhodochrosite, kutnohorite, OH-bearing garnets with dominant andradite composition, hematite, aegirine, aegirine-augite,ferri-ghoseite, ferri-winchite, baryte and pyrophanite. The mineralisation is cross-cut by a system of narrow younger veins composed dominantly of As-enriched minerals of the pyrosmalite group (schallerite, mcgillite and friedelite), tiragalloite, manganberzeliite, brandtite, sarkinite and svabite, associated with hematite, rhodochrosite, kutnohorite, baryte and quartz. Formation of manganese mineralisationat the Diely occurrence was caused by migration of seawater into the basaltic oceanic crust where increasing temperatures and acidity generated hydrothermal fluids enriched in manganese. The Mn-bearing hydrothermal fluids were enriched in Li, providing an additional substituent in the mineralisation. Following initial stages, the subsequent Variscan and Alpine tectonometamorphic events resulted in formation of three main mineralisation stages distinguishable by paragenetic relations and the mineral composition. Based on metamorphic association and amphibole geobarometric calculations, the peak metamorphic conditions reached was upper greenschist facies. The Diely occurrence near Poráč represents a unique metamorphosed manganese mineralisation.

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

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Volume of the periodical

89

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

21

Pages from-to

71-91

UT code for WoS article

001427217200001

EID of the result in the Scopus database

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