The Ushuaia pluton, Tierra del Fuego, Andes: petrographic facies and

CERREDO M.E.; REMESAL M.B.; TASSONE A.; MENICHETTI M.; PERONI J.I.

Santiago, Chile

Simposio; Geosur, An International Symposium on the Geology and Geophysics of the Southern Hemisphere; 2007

Geosur

The Ushuaia Pluton is a poorly exposed epizonal intrusive body hosted in the Early Cretaceous Yahgan Formation on the northern margin of the Beagle Channel, within the area of a major aeromagnetic anomaly of around 70 km2. In spite of the very restricted outcrops (< 3 km along the Beagle Channel shoreline), an extended metamorphic contact aureole (> 1km) is recognized in the host turbidites with a K-feldspar zone where local pockets of partial melts were produced.