Complex granitic pegmatites as tabular bodies up to several hundred meters long and 30m thick. Hosted in schists of the La Playa Formation, related to a trondheimite intrusion.
Ref: Revista de la Asociacion Geologica Argentina 38(3-4), 340-380.
M.F. Marquez-Zavalia. M.A. Galliski, P. Cerny, and R. Chapman: "A bismuth-rich, tellurium-bearing mineral assemblage from El Quemado granitic pegmatite, Nevados de Palermo, Salta, Argentina." Canadian Mineralogist (accepted).