Lithochemistry and geochronological characterization of granites of Batólito Águas Belas‑Canindé, Domínio Pernambuco-Alagoas, Province Borborema

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DOI:

https://doi.org/10.11606/issn.2316-9095.v18-143981

Keywords:

Granite intrusions, Batholithe Águas Belas-Canindé, Lithochemistry, SHRIMP U-Pb zircon age Geochronology

Abstract

The plutons Serra da Caiçara (616 ± 3 Ma), composed by coarse-grained hornblende quartz syenite to hornblende alkali quartz feldspar syenite; Santana do Ipanema (621 ± 5 Ma), monzogranites to equigranular sienogranites; and Maravilha (627 ± 5 Ma), porphyritic monzogranites with strong magmatic foliation, are some of the intrusions that make up Aguas Belas-Canindé Batholith, Dominio Pernambuco-Alagoas, Borborema Province, northeastern Brazil. The U-Pb (SHRIMP) ages in zircon of the plutons indicate intrusion associated with regional low-angle foliation, generated during the convergence of the Brasiliano Orogenesis. The granites and syenites are high-K calc-alkaline to shoshonitic, metaluminous to lightly peraluminous, of the magnetite granites and magnesian series. The chondrite-normalized REE patterns indicate moderate to high fractionation, present (La/Lu)N between 14 and 82, and slightly negative Eu anomalies. Chondrite‑normalized incompatible elements show marked negative spikes in Nb-Ta and Ti, typical of magmas related to subduction zones. Amphibole and biotite of the three plutons have compositions typical of granites of calcalkaline series and have values of Fe # similar to those of the total rock. Geochemical data suggest that the magma was generated in arc environment, derived from the fusion of high K basaltic rocks, under oxidizing conditions, and evolved by fractional crystallization.

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Author Biography

  • Charles Henrique Fernandes Sales das Neves, Universidade Federal de Pernambuco - UFPE
    • Graduado em geologia pela Universidade Federal de Pernambuco (2011 - 2015)
    • Mestrado em geologia pela Federal de Pernambuco (2016 - 2018)

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Published

2018-12-20

Issue

Vol. 18 No. 4 (2018)

Section

Articles

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How to Cite

Neves, C. H. F. S. das, Ferreira, V. P., & Neves, S. P. (2018). Lithochemistry and geochronological characterization of granites of Batólito Águas Belas‑Canindé, Domínio Pernambuco-Alagoas, Province Borborema. Geologia USP. Série Científica, 18(4), 173-192. https://doi.org/10.11606/issn.2316-9095.v18-143981