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In the Pieniny Volcanic Arc (Miocene), the northernmost volcanic arc of the West Carpathians, hydrothermal activity produced some ore-bearing veins associated with moderate-size andesite intrusions. They were subjected to prospecting and mining for gold, silver and lead for a short period at the beginning of the 18th century. K-Ar dating of secondary chlorine-biotite from the mineralized zone at Mt Jarmuta, yielded a K-Ar date of 11.35š0.45 Ma. This K-Ar date fits well with the average K-Ar age (11.34š0.50 Ma) obtained on unaltered andesite sills exposed at Mt Jarmuta. It indicates a close age-relationship between the emplacement of the andesite intrusion and the subsequent ore-mineralization during Miocene (Sarmatian) time.
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Tom
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279--294
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Bibliogr. 45 poz.
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- Polish Academy of Sciences, Institute of Geological Sciences, Research Center in Kraków Poland, ndbirken@cyf-kr.edu.pl
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Bibliografia
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bwmeta1.element.baztech-article-BAT3-0017-0063