Experimental Constraints on Hercynian Anatexis in the Iberian Massif, Spain

Abstract

decisive in determining at which stage of the tectonic According to their chemical and mineralogical com-cycle anatexis took place. With these arguments in mind, positions, the Hercynian granitoids, both older andwe have studied experimentally the melting relationships younger, can be grouped into two families: peraluminous,of the Ollo de Sapo gneiss. The geochemical relationships two-mica granites and leucogranites; and biotite-bearingand the compositions of melts derived from this mica- (± Crd ± Hb) granodiorites. The widespread ocurrencerich gneissic rock were established by Castro