Articles | Volume 9, issue 3
https://doi.org/10.5194/se-9-797-2018
https://doi.org/10.5194/se-9-797-2018
Research article
 | 
19 Jun 2018
Research article |  | 19 Jun 2018

Ca-rich garnets and associated symplectites in mafic peraluminous granulites from the Gföhl Nappe System, Austria

Konstantin Petrakakis, Nathalie Schuster-Bourgin, Gerlinde Habler, and Rainer Abart

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Cited articles

Carswell, D. A., Möller, C., and O'Brien, P. J.: Origin of sapphirine-plagioclase symplectites in metabasites from Mitterbachgraben, Dunkesteinerwald granulite complex, Lower Austria, Eur. J. Mineral., 1, 455–466, 1989.
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Chakraborty, S. and Ganguly, J.: Cation diffusion in alumosilicate garnets: experimental determination in spessartine-almandine diffusion couples, evaluation of effective binary diffusion coefficients, and applications, Contrib. Mineral. Petr., 111, 74–86, 1992.
Duretz, T., Kaus, B., Schulmann, K., Gapais, D., and Kermarrec, J.: Indentation as an extrusion mechanism of lower crustal rocks: Insight from analogue and numerical modelling, application to the Eastern Bohemian Massif, Lithos, 124, 158–168, 2011.
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Short summary
Aluminum-rich granulites from Austria contain large garnets with kyanite inclusions. Garnets are built up from compositionally different types. They are replaced partially by various symplectites. Thermodynamic analysis points to metasomatic alteration and rock decompression due to tectonic transport at high temperatures from deep to middle crustal levels. The various symplectites were formed after decompression during cooling within a short time interval of less than 500 years.