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BURIÁNEK, D. HOUZAR, S. KRMÍČEK, L. ŠMERDA, J.
Originální název
Origin of the pegmatite veins within the skarn body at Vevčice near Znojmo (Gföhl Unit, Moldanubian Zone)
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
The lower crustal Gföhl Unit (Moldanubian Zone of the Bohemian Massif) consists of various felsic orthogneisses to migmatites (the so-called Gföhl gneiss) that are commonly associated with the high-pressure felsic granulites, serpentinized garnet/spinel peridotites, garnet pyroxenites, eclogites and skarns. The relatively small skarn bodies at Vevčice in southern Moravia have the prevailing assemblage of medium- to coarse-grained granoblastic clinopyroxene + garnet ± amphibole ± epidote. The skarn is cut by narrow veins of diorite pegmatite (SiO2 = 46–56 wt. %) which is geochemically distinct from granitic melt generated by migmatization of surrounding orthogneisses. Whole-rock and mineral chemistry of diorite pegmatites are consistent with their origin as a product of melt infiltration from surrounding migmatites and subsequent contamination by the country-rock skarn, with or without, fractional crystallization/crystal accumulation. Similarity in composition of amphiboles in the skarn and in the pegmatite can indicate formation under similar conditions, at c. 750 °C and 0.7–0.8 GPa.
Klíčová slova
diorite pegmatite; skarn; mineralogy; geochemistry; Moldanubian Zone; Bohemian Massif
Autoři
BURIÁNEK, D.; HOUZAR, S.; KRMÍČEK, L.; ŠMERDA, J.
Vydáno
7. 3. 2017
Nakladatel
Czech Geological Society
Místo
Praha
ISSN
1802-6222
Periodikum
Journal of GEOsciences
Ročník
62
Číslo
1
Stát
Česká republika
Strany od
Strany do
23
Strany počet
URL
http://www.jgeosci.org/detail/jgeosci.234/abstract/
BibTex
@article{BUT135540, author="BURIÁNEK, D. and HOUZAR, S. and KRMÍČEK, L. and ŠMERDA, J.", title="Origin of the pegmatite veins within the skarn body at Vevčice near Znojmo (Gföhl Unit, Moldanubian Zone)", journal="Journal of GEOsciences", year="2017", volume="62", number="1", pages="1--23", doi="10.3190/jgeosci.234", issn="1802-6222", url="http://www.jgeosci.org/detail/jgeosci.234/abstract/" }