The concentrations of light rare land elements (LRLE) in plutonic felsic rock are, in majority, completely dominated by supplementary phases, such as monazite, producing a potent petrogenetic indicative in the chemical study of RLE in granitic rocks. Seeking to deepen this notion we are presenting, comparing and discussing patterns of ETR in rocks, essential minerals and trace elements of massive crustal granites from the Neoproterozoic age, in the proximities of São Paulinho's town (SPL), Santa Luzia do Norte (SLN) São João do Sul (SJS) and Santo Antônio do Jacinto (SAJ) in the Jequitinhonha Complex in the State of Bahia, northeast Brazil. Just in very differentiated rocks (poor in trace minerals), there happens significant changes in the formats of the patterns of ETR, suggesting that in the initial stages of magmatic evolution, the variations of those formats, due to the division of essential minerals, are in good part masked by the trace minerals.
acessory minerals; geochemistry; Rare Earth Elements; granitoids
