and Muscovite in Rare-element Pegmatites and Granites from the Totoral Pegmatite Field, San Luis, Argentina...Ernesto Perino3 1 Department of Geology, 3Area of Analytical Chemistry, University of San Luis, and 2IANIGLA...2IANIGLA, CONICET-CCT-MENDOZA, Mendoza, Argentina Abstract The geochemistry of K-feldspar for K, P, Sr, Ba...Ba, Rb, Cs, Ga, and of muscovite for the same elements plus Nb and Ta, was used for proving the parental...southernmost pegmatitic ďŹeld of the Pampean pegmatite province in Argentina. The variation of K/Rb-Cs, K/Cs-Rb |