%0 Journal Article
%A Baldo , Edgardo G.
%A Casquet Martín, César
%A Galindo Francisco, María Del Carmen
%T El metamorfismo de la Sierra Chica de Córdoba (SierrasPampeanas). Argentina
%D 1996
%@ 0213-683X
%U https://hdl.handle.net/20.500.14352/56925
%X Preliminary results on the regional metamorphism of the Sierra Chica (Sierras Pampeanas) are reported.The work is based on a detailed textural and mineral study of high-grade cordierite-garnet metapeliticmigmatites of diatexitic type. Three events are recognized on the basis of garnet textural and chemicalzoning: M7 probably represents an older metamorphism and took place under subsolidus conditions;M2 is synchronous to the main regional foliation (Sn+1). The peak of metamorphism was reached at thisstage under granulite facies conditions (P1= 5.7 ± O.4kb, T= 820 ± 25°C). This event is assigned to thePampean Orogeny; M3 represents a lower P-T event which is temptatively assigned to the uplift of thepreviously thickened continental crust. Registered P-T conditions for this retrograde event have beendetermined at 4±0.5kb and 775 ± 75°C respectively.
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