Late magmatic controls on the origin of schorlitic and foititic tourmalines from late-Variscan peraluminous granites of the Arbus pluton (SW Sardinia, Italy). Crystal-chemical study and petrological constraints
Tourmalines from the late-Variscan Arbus pluton (SWSardinia) and its metamorphic aureole were structurally
and chemically characterized by single-crystal X-ray diffraction, electron and nuclear microprobe analysis,
Mössbauer, infrared and optical absorption spectroscopy, to elucidate their origin and relationships with the
magmatic evolution during the pluton cooling stages. The Arbus pluton represents a peculiar shallow magmatic
system, characterized by sekaninaite (Fe-cordierite)-bearing peraluminous granitoids, linked via AFC processes