INSTITUTO DE GEOCRONOLOGIA Y GEOLOGIA ISOTOPICA
Unidad Ejecutora - UE
congresos y reuniones científicas
PETROGRAFÍA Y GEOQUÍMICA DEL BASAMENTO METAMÓRFICO AL SUR DEL LAGO ÑORQUINCO, PROVINCIA DE NEUQUÉN, ARGENTINA
ERNESTO GALLEGOS; MARÍA ELENA VATTUONE; HÉCTOR OSTERA
Congreso; X Congreso de Mineralogía y Metalogénia; 2010
The aim of this study is to characterize by means of petrography and geochemistry of metamorphic rocks that form the crystalline basement of the study area. A total of eight locations were identified. Petrographic traditional and detailed analysis was complete on each location. In five locations complete chemical analysis were conducted of bulk rock samples.The analyzed rocks are petrographically divided into two groups characterized by different metamorphic mineralogy. These two groups represent their different protoliths, sedimentary and igneous (acid to intermediate). This supports the results of chemical analysis, which show main differences for SiO2, Al2O3, MgO, K2O, Sr and Rb abundances.