SciELO - Scientific Electronic Library Online

 
vol.61 número3Petrogénesis de los thundereggs en domos riolíticos del centro del Chubut, PatagoniaDiagénesis y arcillas intersticiales en las unidades neopaleozoicas del Grupo Paganzo-La Rioja índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

  • No hay articulos citadosCitado por SciELO

Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google

Bookmark


Revista de la Asociación Geológica Argentina

versión On-line ISSN 1851-8249

Resumen

GARGIULO, M.F.. Characterization of metamorphic basement in the eastern part of Brazo Huemul, province of Neuquén. Rev. Asoc. Geol. Argent. [online]. 2006, vol.61, n.3, pp. 355-363. ISSN 1851-8249.

This paper describes for the first time in the study area the lithology, structure and different metamorphic events that have affected the basement in the eastern margin of Brazo Huemul of Nahuel Huapi Lake. These rocks have been classified as protomilonitic paragneisses and they were correlated to the Colohuincul Complex. A brittle - ductile shear zone with an orientation of N14ºW (similar to the regional trend) has been interpreted as a deep angle reverse fault (74º SW), that put metamorphic basement rocks in tectonic contact with volcanic/volcaniclastic rocks from Ventana Formation. In agreement with the mineral assemblages observed (quartz - chlorite - biotite - garnet (almandine) - albite) it was possible to determine a sedimentary pelitic protolith that was affected by regional metamorphism under high temperature green schist facies (biotite - garnet zone) conditions.

Palabras llave : Metamorphic basement; Colohuincul Complex; Shear zone; Brittle - ductile deformation; Green schist facies.

        · resumen en Español     · texto en Español     · pdf en Español