@inproceedings{inproceedings6bc5388e, title = {The evolution of Paraná acid volcanic rocks: implications from trace-element and Sr isotope microanalysis in phenocrysts and groundmass by LA-ICPMS}, author = {Freitas, V. A. and Janasi, Valdecir de Assis and Simonetti, A. and Heaman, L. M. and Martins, Lucelene and Andrade, Sandra and Angelica, L. P.}, year = {2009}, booktitle = {Simpósio 45 anos de Geocronologia no Brasil: CPGEO 1964-2009} }