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Open AccessArticle

Origin of Talc and Fe-Ti-V Mineralization in the Kletno Deposit (the Śnieżnik Massif, SW Poland)

1
Institute of Geochemistry, Mineralogy and Petrology, Faculty of Geology, University of Warsaw, Żwirki i Wigury 93, 02-089 Warszawa, Poland
2
Institute of Geological Sciences, Faculty of Earth Sciences and Environmental Management, University of Wrocław, Maksa Borna 9, 50-204 Wrocław, Poland
3
Department of Geological Sciences, University of Texas, 2275 Speedway Stop C9000, Austin, TX 78712, USA
4
Independent Researcher, 05-070 Sulejówek, Poland
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(1), 13; https://doi.org/10.3390/min10010013
Received: 14 August 2019 / Revised: 6 December 2019 / Accepted: 19 December 2019 / Published: 22 December 2019
(This article belongs to the Special Issue Mineral Deposits of Central Europe)
The Kletno deposit in the Śnieżnik Massif (Central Sudetes, SW Poland), mined for Fe, U, Ag, Cu, fluorite, and marble through the ages, developed at the contact of marbles and orthogneiss. Here, we present a new Fe-Ti-V-ore (containing up to 14.07 wt. % Fe, 2.05 wt. % Ti, and 2055 ppm V in bulk rock) and ornamental- to gem-quality talc prospect at the southwest margin of this deposit. This newly documented Fe-Ti-V mineralization is hosted in hornblendites, dolomite veins, and chlorite schists, which, along with talc, envelopes a tectonic slice of serpentinite. Hornblendites are interpreted as metamorphosed ferrogabbros, derived from the same mafic melts as adjacent barren metagabbros. The oxygen and carbon isotope compositions of metabasites and dolomite veins (amphibole δ18O values = 8.8–9.3‰; carbonate δ18O values = 12.8–16.0‰, and δ13C values = −8.3‰ to −7.2‰), in combination with those of the country marbles (carbonate δ18O and δ13C values = 23.2‰ and +0.1‰, respectively), suggest that mineralization-bearing hornblendites formed due to interaction of the mafic magma with CO2 released during the decarbonation of the sediments. The CO2-bearing fluid interaction with gabbros likely caused carbonation of the gabbros and formation of the dolomite veins, whereas talc formed due to Si-rich fluids, possibly derived from a mafic intrusion, interaction with serpentinite, or due to the metasomatism of the serpentinite–gabbro assemblage. Moreover, fluids leaching Fe and Ti from the adjacent sediments can mix with the mafic magma causing enrichment of the magma in Fe and Ti. Consequently, the mineralization-bearing ferrogabbros became even more enriched in Fe and Ti, which can be linked with the formation of Fe-Ti-V ore bodies. View Full-Text
Keywords: Śnieżnik Massif; Kletno deposit; Fe-Ti-V mineralization; talc; carbonate veins; stable isotopes; serpentinite-gabbro-sediment assemblage Śnieżnik Massif; Kletno deposit; Fe-Ti-V mineralization; talc; carbonate veins; stable isotopes; serpentinite-gabbro-sediment assemblage
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Gil, G.; Gunia, P.; Barnes, J.D.; Szymański, M.; Jokubauskas, P.; Kalbarczyk-Gil, A.; Bagiński, B. Origin of Talc and Fe-Ti-V Mineralization in the Kletno Deposit (the Śnieżnik Massif, SW Poland). Minerals 2020, 10, 13.

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