IANIGLA   20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
The Nb-Ta-U oxide minerals from María Elena pegmatite, San Luis, Argentina
Autor/es:
GALLISKI, M.A.; MÁRQUEZ-ZAVALÍA, M.F.; ROQUET, M.B.
Revista:
IG. SERIE B, ESTUDOS E PESQUISAS
Editorial:
Universidad Federal de Pernambuco
Referencias:
Lugar: Recife, PE, Brasil; Año: 2009 vol. 19 p. 127 - 127
ISSN:
0080-0244
Resumen:
Minerals of the pyrochiore group are relatively common minor accessory phases in the granitic pegmatites of the Sierras Pampeanas, usually in subordinate quantities relative to the columbite-group minerals (Galliski & Cerny 2006). However, in the María Elena pegmatite, San Luis Range, Argentina, we found an assemblage of plumbomicrolite, plumbopyrochlore, uranpyrochlore and liandratite associated with columbite-(Mn) that are uncommon in granitic pegmatites ofArgentina where most of the associations contain microlite, uranmicrolite or pyrochiore. We introduce the paragenesis and geochemistry of these phases as the first step in the  detailed examination of this pegmatite.