Original paper

The baric character of the Patagonian basement as deduced from the muscovite d060,331 spacing: a first contribution from Eastern Andean Metamorphic Complex (Andes, Chile)

Ramírez, Elisa; Sassi, Raffaele


In this work we present new data concerning the pressure character of metamorphism in the Aysén Eastern Andean Metamorphic Complex. The parameter d060,331 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.


white micasd060,331 parameterpressure characteraysen metamorphic complex