Origin of the pegmatite veins within the skarn body at Vevčice near Znojmo (Gfohl Unit, Moldanubian Zone)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F17%3A00475498" target="_blank" >RIV/67985831:_____/17:00475498 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26110/17:PU123575 RIV/00025798:_____/17:00000039 RIV/00094862:_____/17:N0000181

Result on the web

<a href="http://dx.doi.org/10.3190/jgeosci.234" target="_blank" >http://dx.doi.org/10.3190/jgeosci.234</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.234" target="_blank" >10.3190/jgeosci.234</a>

Result language

angličtina

Original language name

Origin of the pegmatite veins within the skarn body at Vevčice near Znojmo (Gfohl Unit, Moldanubian Zone)

Original language description

The lower crustal Gfohl Unit (Moldanubian Zone of the Bohemian Massif) consists of various felsic orthogneisses to migmatites (the so-called Gfohl gneiss) that are conunonly associated with the high-pressure felsic granulites, serpentinized gamet/spinel peridotites, garnet pyroxenites, eclogites and skanis. The relatively small skarn bodies at Vevcice 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. Major pegmatite minerals are plagioclase (An(15-14)), amphibole (K-rich hastingsite and potassic-hastingsite) and quartz, accompanied by minor K-feldspar, garnet, allanite-epidote, clinopyroxene, and accessory titanite. The pegmatites are characterized by high contents of Fe2O3tot, (11.2-17.5 wt. %), Ca2O (7.5-10.11 wt. %), Na2O (2.9-3.3 wt. %) and low contents of MgO (1.4-1.6 wt. %), K2O (1.2-1.6 wt. %), Rb (43-86 ppm). 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 degrees C and 0.7-0.8 GPa.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/LO1408" target="_blank" >LO1408: AdMaS UP – Advanced Building Materials, Structures and Technologies</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geosciences

ISSN

1802-6222

e-ISSN

—

Volume of the periodical

62

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

23

Pages from-to

1-23

UT code for WoS article

000400030700001

EID of the result in the Scopus database

2-s2.0-85018366428