The origin of Ba-rich mica and alkali feldspar from the Ponte Nova alkaline mafic-ultramafic massif (Southeastern Brazil) explained by major- and trace-elements and isotopic analyses

Mariana Robertti Ambrosio1, Rogério Guitarrari Azzone1 and Frank J Tepley III2, (1)USP University of Sao Paulo, São Paulo, Brazil, (2)Oregon State University, CEOAS, Corvallis, OR, United States
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