One amphibolite facies metamorphic event is registered in chromites and hornblendes from the Palma Group serpentinites and meta-andesites, Brazil's southernmost Rio Grande do Sui Slate. Metamorphism was apparently caused by syntectonic injection of voluminous Cambaí Group meta-granitoids and not by post-tectonic Jaguari Granite intrusion. Regional metamorphic hornblendes are in direct contact with magmatic pargasites, which indicates that it was the first metamorphic event in the area. Both hornblendes in Campestre Formation and Crspinels in Cerro da Cruz Formation are little zoned, an indication that only one metamorphic event was of regional extent. Recrystallization to chlorite + epidote greenschist facies parageneses is restricted to shear zones and volumetrically small.

SC ' 111C ltape mu G ranite. loc ated in the Cu tariucnsc Shield. so uthern Brazil. is u lute-oroge nic intrusion in the Pulcoprotero zoic Cam boriu Co mplex g neisses. and shows V-Ph agc o f2 0 11± 14M a. II is co mposed (If hornblend e-bio tit e granodiorites and biotit e mon zo granites. wh ich arc d istribu ted in two mai n fac ies : it line 10 medium-grain ed cquigrauular facies and a hctcmgranularon c.T hc ltapema Gran ite SI1

A composição química de anfibólios de dez amostras de anfibolitos com Complexo Metamórfico Passo Feio de Caçapava do Sul, RS, mostra o desenvolvimento da fácies anfibolito ao norte e ao sul do complexo granítico, no evento M1. O evento M2 foi de fácies xistos verdes a anfibolito na borda norte e de fácies anfibolito na borda sul. O tipo bárico é de baixa pressão, conforme indicado pela presença de andalusita e pela distribuição de Ti e Al nos anfibólios. A fraca zonação composicional da estaurolita indica a atuação de metamorfismo regional e não de contato.