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BURIÁNEK, D. HOUZAR, S. KRMÍČEK, L. ŠMERDA, J.
Original Title
Origin of the pegmatite veins within the skarn body at Vevčice near Znojmo (Gföhl Unit, Moldanubian Zone)
Type
journal article in Web of Science
Language
English
Original Abstract
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.
Keywords
diorite pegmatite; skarn; mineralogy; geochemistry; Moldanubian Zone; Bohemian Massif
Authors
BURIÁNEK, D.; HOUZAR, S.; KRMÍČEK, L.; ŠMERDA, J.
Released
7. 3. 2017
Publisher
Czech Geological Society
Location
Praha
ISBN
1802-6222
Periodical
Journal of GEOsciences
Year of study
62
Number
1
State
Czech Republic
Pages from
Pages to
23
Pages count
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/" }