Search Results - "VILALVA, FREDERICO C.J."

Geology, petrography and geochemistry of the A-type granites from the Morro Redondo Complex (PR-SC), southern Brazil, Graciosa Province by VILALVA, FREDERICO C.J., VLACH, SILVIO R.F.

“…The Morro Redondo Complex is one of the most important occurrences of the Graciosa A-type Province, southern Brazil. It consists of the Papanduva and Quiriri…”
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Astrophyllite in peralkaline granites from the Graciosa Province (S-SE Brazil): Insights for magmatic vs. post-magmatic crystallization environments by Siachoque, Astrid, Vilalva, Frederico C.J., Vlach, Silvio R.F.

“…Astrophyllite is a common “agpaitic” accessory mineral in evolved peralkaline alkali feldspar granites from the Mandira and Papanduva plutons in the Graciosa…”
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Chemical and O-isotope compositions of amphiboles and clinopyroxenes from A-type granites of the Papanduva Pluton, South Brazil: Insights into late- to post-magmatic evolution of peralkaline systems by Vilalva, Frederico C.J., Vlach, Silvio R.F., Simonetti, Antonio

“…Clinopyroxene and amphibole are the main mafic minerals in peralkaline granites of the Papanduva Pluton, Morro Redondo Complex, one of the most important…”
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Nacareniobsite-(Ce) and britholite-(Ce) in peralkaline granites from the Morro Redondo Complex, Graciosa Province, southern Brazil; occurrence and compositional data by Vilalva, Frederico C. J, Vlach, Silvio R. F, Simonetti, Antonio

“…Nacareniobsite-(Ce), Na3Ca3(REE)Nb(Si2O7)2OF3, and britholite-(Ce), (Na,Ca,REE)10(Si,P)6O24(OH,F)2, formed during the late stages of crystallization of the…”
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Crystallization ages of the A-type magmatism of the Graciosa Province (Southern Brazil): Constraints from zircon U-Pb (ID-TIMS) dating of coeval K-rich gabbro-dioritic rocks by Vlach, Silvio R.F., Siga, Oswaldo, Harara, Ossama M.M., Gualda, Guilherme A.R., Basei, Miguel A.S., Vilalva, Frederico C.J.

“…Zircon U-Pb (ID-TIMS) ages for gabbro-dioritic rocks and for a monzogranite from the Graciosa Province of A-type granites and syenites, southern Brazil, are…”
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