Tourmaline granites of the Conlara Metamorphic Complex,

LÓPEZ DE LUCHI, M.G.; IANIZZOTTO, N.F.; MARTÍNEZ DOPICO, C.I.; CERREDO, M.E.

Neuquén

Congreso; 18 Congreso Geológico Argentino; 2011

Universidad del Comahue

The Ordovician Los Alanices granite includes muscovite granites (MsG) and muscovite-tourmaline leucogranites (MsTG)  and belongs to the low-temperature muscovite leucogranites of the Ordovician granodiorite?granite suite (OGGS; peraluminous calcic to calc-alkaline granodiorite?monzogranites) of the Sierra de San Luis. K-Ar muscovite cooling age of 420 ± 9 Ma was calculated for the MsTG whereas muscovite from the near El Peñón muscovite leucogranite (SHRIMP U/Pb zircon age of 497 ± 8 Ma) yielded 439 ± 10 Ma  Magmatic to high temperature solid-state deformation argues for an early Famatinian syn-kinematic emplacement for the MsG .