In this work we present new data concerning the pressure character of metamorphism in the Aysén Eastern Andean Metamorphic Complex. The parameter d060,33 – 1 of the K-white mica from basement pelitic rocks was measured as a barometric indicator. Three sample groups from different areas were considered, for a total of 69 samples. All measured values suggest a metamorphic setting characterised by intermediate to high pressure. Key-words: white micas, d060,33–1 parameter, pressure character, Aysén metamorphic Complex.
The baric character of the Patagonian basement as deduced from the muscovite spacing: a first contribution from Eastern Andean Metamorphic Complex (Andes, Chile)
SASSI, RAFFAELE
2001
Abstract
In this work we present new data concerning the pressure character of metamorphism in the Aysén Eastern Andean Metamorphic Complex. The parameter d060,33 – 1 of the K-white mica from basement pelitic rocks was measured as a barometric indicator. Three sample groups from different areas were considered, for a total of 69 samples. All measured values suggest a metamorphic setting characterised by intermediate to high pressure. Key-words: white micas, d060,33–1 parameter, pressure character, Aysén metamorphic Complex.File in questo prodotto:
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