Relations between grain size and Th-Pb ages of monazite: examples from high-grade metapelitic gneiss from the Ulten Zone, eastern Alps

Antonio Langone (*), Roberto Braga (*), Hans-Joachim Massonne (**) & Massimo Tiepolo (***)
(*) Dipartimento di Scienze della Terra e Geologico-Ambientali, Università di Bologna, Italy. E-mail: antonio.langone@unibo.it; r.braga@unibo.it (**) Institut für Mineralogie und Kristallchemie, Universität Stuttgart, Germany. E-mail: h-j.massonne@imi.uni-stuttgart.de (***) Istituto di Geoscienze e Georisorse, CNR, Pavia, Italy. E-mail: tiepolo@crystal.unipv.it