Microgranitic enclaves as products of self-mixing events: a study of open-system processes in the Maua Granite, Sao Paulo, Brazil, based on in situ isotopic and trace elements in plagioclase - Alves, Adriana; Janasi, Valdecir de Assis; Simonetti, Antonio; Heaman, Larry M. (Journal of Petrology, 2009)