INVESTIGADORES
CASTRO Brigida Marta Ester
congresos y reuniones científicas
Título:
Identificación de protolitos del basamento gnéisico de las sierras de La Huerta y Valle Fértil, Sierras Pampeanas Occidentales, provincia de San Juan, mediante criterios geoquímicos
Autor/es:
PREVILEY, LORENA; CASTRO DE MACHUCA, BRÍGIDA
Lugar:
Río Cuarto (Córdoba)
Reunión:
Congreso; 7º Congreso de Mineralogía y Metalogenia; 2004
Institución organizadora:
AMA - Universidad Nacional de Río Cuarto y Universidad de Buenos Aires
Resumen:
In La Huerta and Valle Fertil ranges, Western Pampean Ranges, province of San Juan, a medium to high-grade metamorphic basement crops out. It is composed mainly of Grt-Bt±Sil gneisses, amphibolites and marbles. The combination of petrographical and geochemical (whole-rock major elements) analyses of the gneisses indicate that they derived from a sedimentary source comprising a succession of pelites and semipelites and minor greywackes, that was part of an active margin sequence. The comparison of bulk rock compositions of the gneisses with the rock data base provided by the Ancomp program (Röhr, 1997) confirms the nature of the protoliths.
