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Browsing by Subject "volcanics"

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    Item type:Article, Access status: Open Access ,
    Blueschists in the Cretaceous exotic conglomerates of the Klape Unit (Pieniny Klippen Belt, Western Carpathians): their genetic types and implications for source area
    (Wydawnictwa AGH, 2006) Ivan, Peter; Sykora, Milan; Demko, Rastislav
    In the Klape Unit of the Pieniny Klippen Belt the Albian conglomerates with clasts of exotic carbonates, clastic sediments and also volcanic and plutonic rocks are relatively widespread. In the small area near the town Povażska Bystrica also scarce blueschist clasts of variegated petrographic types have been found. Three groups of starting rocks can be discerned for blueschists: pelagic sediments, metamorphic rocks (amphibolites, gneisses) and volcanic rocks. Based on immobile trace element (HFSE, REE) distribution two petrogenetic types of volcanic rocks have been identified: basalts with BABB signature and calc-alkaline basaltic andesites to rhyolites. Source of these rocks was probably a nappe stack located in the Carpathian interior and created in the Late Jurassic time as a result of subduction of the oceanic crust and adjacent volcanic arc and followed by collision during the Meliata Ocean closure.