IANIGLA   20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
capítulos de libros
Título:
Geoquímica del yacimiento pegmatítico María del Huerto, Grupo Villa Praga-Las Lagunas, Distrito Conlara, San Luis, Argentina.
Autor/es:
1) ROQUET, M. B., OYARZÁBAL J. C., PERINO, E. Y GALLISKI, M. A.
Libro:
Avances en Mineralogía, Metalogenia y Petrología 2008
Editorial:
Estudio Sigma S.R.L.
Referencias:
Lugar: Buenos Aires; Año: 2008; p. 153 - 158
Resumen:
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María del Huerto pegmatite is located at 32º 31´
46´´S and 65º 24´ 17´´W, 20 km
west of Concarán, San Luis,
Argentina. This
deposit is part of the Villa Praga-Las Lagunas group, of the Conlara pegmatitic
field. The pegmatite is hosted predominantly in a granodioritic lens; it has
tabular form with NE-SW strike and sub-vertical dip. The internal structure
shows from the margin inwards: border, wall, outer intermediate, inner
intermediate and core zones; Ms replacement units and Qtz-Pl-Ms±Brl units have been recognized. The mineral assemblage comprises: Qtz-Pl-Ms-Mc-Spd-Brl-Grt-Ap-Tur-Dick-Ill-Mn
and Fe secondary oxides.
According to the mineralogy and geochemistry features, this deposit is classified as a rare-element pegmatite of complex type and spodumene subtype and whith Li-Be-(Ta) mineralization. The K/Rb, K/Cs and Rb/Sr ratios in microclines
and muscovite are in agreement with these results.
Palabras
clave: pegmatita - geoquímica - microclino - muscovita -
Key word: pegmatite - geochemistry
- microcline - muscovite -