Petrogenesis of spinel peridotite suite xenoliths from northern Santa Cruz province, Argentina; implication for the Patagonian Lithospheric Mantle

NTAFLOS, TH.; MUNDL, A.; BJERG, E. A.; TSCHEGG, C.; KOSLER, J.

Viena

Conferencia; European Geosciences Union General Assembly 2010; 2010

European Geosciences Union

Mantle xenoliths from Don Camilo, an area located on the North margin of the Deseado Masiff in Patagonia, comprise spinel bearing lherzolites, harburgites and dunites, wehrlites, clinopyroxenites and gabbros. The most common rock type in our collection is spinel-lherzolite followed by dunites. Harzurgites, wehrlites andgabbros are less widespread. Spinel-lherzolites and harzburgites have protogranular textures whereas dunites have equigranular to equigranular tabular textures. There are two kinds of dunites: mantle dunites and cumulate dunites.