GEOQUÍMICA DE FELDESPATOS POTÁSICOS Y MUSCOVITA DE PEGMATITAS LITÍFERAS DE LA SIERRA DE SAN LUIS, ARGENTINA.

MARTÍNEZ V. A.; GALLISKI M. A.

San Juan

Congreso; 11° CONGRESO DE MINERALOGÍA Y METALOGENIA; 2013

ASOCIIACIION MIINERALOGIICA ARGENTIINA FACULTAD DE CIIENCIIAS EXACTAS,, FIISIICAS Y NATURALES UNIIVERSIIDAD NACIIONAL DE SAN JUAN

In this study, we examined muscovite and K-feldspar from lithium-bearing pegmatites of thesierras de San Luis. Their composition includes trace elements (K, P, Rb, Cs, Sr, Ba, Ga, Nb y Ta)that vary in abundance with the fractionation process and are indicators of internal evolution,typology and economic potential. Fractionation trends evidenced in diagrams do not differ fromthose known trajectories in other districts.Most of the graphics used for K-feldspar and muscovite,clearly show fractionation within each pegmatite. The pegmatites with mineralization and potentialeconomic interest in tantalum are Géminis, Don Rolando, La Viquita, León Herido and, possibly,Las Cuevas.