Title: MUSCOVITE-CHLORITE-QUARTZ THERMOBAROMETRY OF THE PERMIAN METAMORPHIC OVERPRINT OF THE CENTRAL PART OF THE WESTERN INNSBRUCK QUARTZPHYLLITE COMPLEX (TYROL, AUSTRIA)
Abstract:The Innsbruck Quartzphyllite Complex (IQP) is part of the Austroalpine basement nappes north of the Tauern Window. In the central part of the western IQP garnet-mica-schists with the mineral assemblag...The Innsbruck Quartzphyllite Complex (IQP) is part of the Austroalpine basement nappes north of the Tauern Window. In the central part of the western IQP garnet-mica-schists with the mineral assemblage garnet + muscovite + chlorite + garnet + plagioclase occur. Microstructural evidence indicates that the equilibrium assemblage is muscovite + chlorite + quartz, which allows application of the method of VIDAL & PARRA (2000) by considering all possible equilibria among the phase components (muscovite, celadonite, pyrophyllite, clinochlore, Mg-amesite) of this assemblage. Although not unproblematic due to consideration of phase components in muscovite solid solutions involving the vacancy on the A-site, muscovite-chlorite-quartz thermobarometry yielded 500 ± 50°C and 4.5 ± 2 kbar for the garnet mica schists of the central part of the western IQP. Geochronological data from metaporphyroids and quartzphyllites from this area indicate that these P-T conditions most likely represent the Permian event in the western IQP.Read More
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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Cited By Count: 2
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