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Unusually Y-rich monazite-(Ce) with 6–14 wt.% Y2O3 in a granulite from the Bohemian Massif: implications for high-temperature monazite growth from the monazite-xenotime miscibility gap thermometry

Published online by Cambridge University Press:  05 July 2018

E. Krenn  and
F. Finger
E. Krenn*
Affiliation:
Department of Materials Engineering and Physics, University of Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria
F. Finger
Affiliation:
Department of Materials Engineering and Physics, University of Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria
*
*E-mail: erwin.krenn@sbg.ac.at
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Abstract

Accessory monazite-(Ce) with an extraordinarily high proportion of the xenotime component in solid solution of 21–42 mol.% (6.5–14 wt.% Y2O3, 6–11 wt.% HREE2O3) was discovered in a retrogressed Variscan high-pressure, high-temperature granulite from the southern Bohemian Massif, Austria. The grains with the highest proportion of xenotime (XXno ~0.4) should have had a minimum formation temperature of ~1050°C, according to published monazite-xenotime miscibility gap thermometers. This high temperature is consistent with previous petrological studies on the south Bohemian granulites indicating ~1000°C/16 kbar for the peak metamorphic stage.

Keywords

Y-rich monazitexenotimethermometrymiscibility gapgranulitesBohemian Massif
Type
Letter
Information
Mineralogical Magazine , Volume 74 , Issue 2 , April 2010 , pp. 217 - 225
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2010

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