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@article{1091374,
author = {Melleton, Jérémie and Gloaguen, Eric and Frei, Dirk and Novák, Milan and Breiter, Karel},
article_number = {6},
doi = {http://dx.doi.org/10.3749/canmin.50.6.1751},
keywords = {LCT pegmatite columbite–tantalite LA–SF–ICP–MS dating Variscan orogeny Bohemian Massif Moldanubian domain Czech Republic},
language = {eng},
issn = {0008-4476},
journal = {Canadian Mineralogist},
title = {HOW ARE THE EMPLACEMENT OF RARE-ELEMENT PEGMATITES, REGIONAL METAMORPHISM AND MAGMATISM INTERRELATED IN THE MOLDANUBIAN DOMAIN OF THE VARISCAN BOHEMIAN MASSIF, CZECH REPUBLIC?},
volume = {50},
year = {2012}
}
TY - JOUR
ID - 1091374
AU - Melleton, Jérémie - Gloaguen, Eric - Frei, Dirk - Novák, Milan - Breiter, Karel
PY - 2012
TI - HOW ARE THE EMPLACEMENT OF RARE-ELEMENT PEGMATITES, REGIONAL METAMORPHISM AND MAGMATISM INTERRELATED IN THE MOLDANUBIAN DOMAIN OF THE VARISCAN BOHEMIAN MASSIF, CZECH REPUBLIC?
JF - Canadian Mineralogist
VL - 50
IS - 6
SP - 1751-1773
EP - 1751-1773
SN - 00084476
KW - LCT pegmatite columbite–tantalite LA–SF–ICP–MS dating Variscan orogeny Bohemian Massif Moldanubian domain Czech Republic
N2 - The Moldanubian domain of the Variscan Bohemian Massif is characterized by a large number of rare-element pegmatites, which are of possible economic importance. In order to investigate timing relationships between emplacements of Li-bearing rare-element pegmatites and the tectonometamorphic and magmatic evolution of this domain, 10 in situ U–Pb dates of minerals of the columbite–tantalite group from eight rare-element pegmatites, belonging to different pegmatite fields, have been obtained by the LA–SF–ICP–MS technique. As in former studies, our results suggest that assimilation of common Pb is very limited, and diffusion of radiogenic Pb is of minimal importance in columbite. Two ages of emplacement have been obtained. An older episode at ~333 + 3 Ma follows closely the generalized melting event that occurred at the end of the Moravo–Moldanubian phase, during exhumation of high-pressure rocks. The younger episode, at ~325 + 4 Ma, seems to have been contemporaneous with the beginning of the Bavarian phase. The emplacement of Li-bearing rare-element pegmatites in the Moldanubian domain is the oldest known magmatic event involving rare element-enriched melts during the Variscan orogeny. Our results show that the emplacement of Li-bearing rare-element pegmatites is not genetically related with the granulite-facies metamorphism of the lower crust. Rather, the magmas could have originated directly by partial melting linked the formation of migmatites contemporaneous with the exhumation of high-pressure rocks.
ER -
MELLETON, Jérémie, Eric GLOAGUEN, Dirk FREI, Milan NOVÁK a Karel BREITER. HOW ARE THE EMPLACEMENT OF RARE-ELEMENT PEGMATITES, REGIONAL METAMORPHISM AND MAGMATISM INTERRELATED IN THE MOLDANUBIAN DOMAIN OF THE VARISCAN BOHEMIAN MASSIF, CZECH REPUBLIC? \textit{Canadian Mineralogist}. 2012, roč.~50, č.~6, s.~1751-1773. ISSN~0008-4476. Dostupné z: https://dx.doi.org/10.3749/canmin.50.6.1751.
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