Petrography, geochemistry and geochronology of the patrimônio Santo Antônio and São Domingos Granites (Cunhaporanga Granitic Suite, Paraná, Southeast Brazil)

Authors

  • Sérgio Wilians de Oliveira Rodrigues CPRM - Serviço Geológico do Brasil; Superintendência Regional de São Paulo
  • Fabrizio Prior Caltabeloti CPRM - Serviço Geológico do Brasil; Superintendência Regional de São Paulo
  • Vidya Viera de Almeida CPRM - Serviço Geológico do Brasil; Superintendência Regional de São Paulo
  • Mariane Brumati CPRM - Serviço Geológico do Brasil; Superintendência Regional de São Paulo
  • Carlos José Archanjo Universidade de São Paulo; Instituto de Geociências; Departamento de Mineralogia e Geotectônica
  • Maria Helena B.M Hollanda Universidade de São Paulo; Instituto de Geociências; Departamento de Mineralogia e Geotectônica
  • Carlos Alejandro Salazar UFAM; Instituto de Ciências Exatas; Departamento de Geociências
  • Dunyi Liu Beijing SHRIMP Center; Chinese Academy of Geological Sciences

DOI:

https://doi.org/10.5327/Z1519-874X2011000300001

Keywords:

Ribeira Belt, Cunhaporanga Granitic Suite, Geochemistry and Geochronology

Abstract

The Patrimônio Santo Antônio and São Domingos Granites are located in the northwest portion of the Itaiacoca Belt, which is part of the Apiaí Terrane (or tectonic domain), a segment of the southern Ribeira Belt, the major tectonic unit of the Mantiqueira Province (Southeast Brazil). These granites are related to the Cunhaporanga Granitic Suite and are intrusive into metasedimentary rocks of the Itaiacoca Group. The plutons are represented mainly by porphyritic monzogranites, with rare occurrences of syenogranites. The porphyritic monzogranites are ferroan to magnesian, high-K, alkali-calcic, and metaluminous to peraluminous. Trace elements patterns of the granites, which have been locally affected by hydrothermal alteration, suggest an association with magmas emplaced in a late- to post-tectonic setting. The geochemical signatures suggest a mantle source enriched in incompatible elements remobilized from the oceanic crust during subduction. The geochronological age of the Patrimônio Santo Antônio Granite (589 ± 6 Ma, zircon, U-Pb SHRIMP) indicates that the magmatism associated with these plutons occurred between the final stages of evolution of the Cunhaporanga Granitic Suite (ca. 650 to 590 Ma) and the emplacement of the post-orogenic and anorogenic plutons of the Apiaí Domain (ca. 590 to 570 Ma).

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Published

2011-12-01

Issue

Vol. 11 No. 3 (2011)

Section

Articles

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How to Cite

Rodrigues, S. W. de O., Caltabeloti, F. P., Almeida, V. V. de, Brumati, M., Archanjo, C. J., Hollanda, M. H. B., Salazar, C. A., & Liu, D. (2011). Petrography, geochemistry and geochronology of the patrimônio Santo Antônio and São Domingos Granites (Cunhaporanga Granitic Suite, Paraná, Southeast Brazil) . Geologia USP. Série Científica, 11(3), 03-21. https://doi.org/10.5327/Z1519-874X2011000300001