The Neoarchean granitoids of the Vila Jussara complex are located in the Sapucaia domain in Carajás Province, where they appear as a series of coalescing, sigmoidal-shaped plutons with high-angle foliations (75–85°) that follow a regional east–west trend. These plutons are mainly formed of seriated biotite–hornblende monzogranite, although subordinate varieties include biotite–hornblende tonalite, biotite granite and hornblende–biotite granite. The granitoids are distinguished by their Fe* index [FeOt/(FeOt/MgO) ratio]. The biotite–hornblende monzogranites present moderate to high values of this ratio and can be characterized as oxidized and reduced ferroan A-type granites. The biotite granites and hornblende–biotite granites are porphyritic granitoids and are transitional between oxidized granites and slightly magnesian granites. By contrast, the biotite–hornblende tonalites have lower and restricted Fe* indices and magnesian characteristics. Sensitive high-resolution ion microprobe U–Pb dating gives ages of 2743 ± 11 Ma for the oxidized biotite–hornblende monzogranites, 2745 ± 20 Ma for the reduced biotite–hornblende monzogranites, 2742 ± 14 Ma for the hornblende–biotite granites and 2766 ± 9.6 Ma for the biotite–hornblende tonalites. The Nd and Hf isotopic data suggest that the magmas of the Vila Jussara suite present a slight crustal contribution with or without contamination and were derived from rocks of Meso- to Paleoarchean age (2.82 < TDM < 3.45 Ga); the Nd(t) values are mostly between −3.62 and +1.55 and the Hf(t) values are between −4.77 and +1.78. The petrogenetic model that was used to determine the primary magmas of this suite suggests that the source rocks were geochemically similar to Mesoarchean granulites from the Canaã dos Carajás domain. The emplacement of Neoarchean granites occurred by multiple injections of magma, generating extensive hybridization under a transpressional/transtensional tectonic regime dominated by pure shear and resulting in a syntectonic post-collisional setting for these rocks.
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February 03, 2025
Petrogenesis and tectonic settings of the Neoarchean A-type granitoid complex from the Carajás Province, Amazonian craton: constraints from geochemistry, SHRIMP U‒Pb zircon geochronology and Hf–Nd isotopes
Fernando Fernandes da Silva;
Fernando Fernandes da Silva
*
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
*
Correspondence: [email protected]
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Davis Carvalho de Oliveira;
Davis Carvalho de Oliveira
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
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Roberto Dall'Agnol;
Roberto Dall'Agnol
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
2
Instituto Tecnológico Vale
, Belém, Pará, Brazil
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João Orestes Schneider Santos;
João Orestes Schneider Santos
3
Fundação da Universidade Estadual do Amazonas, Avenida Gov. Danilo de Matos Areosa, 160 Distrito Industrial I
, Manaus, AM 69075-351, Brazil
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Marco Antonio Galarza;
Marco Antonio Galarza
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
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Fabriciana Vieira Guimarães;
Fabriciana Vieira Guimarães
4
Universidade Federal do Oeste do Pará, Instituto de Engenharia e Geociências/Curso de Geologia
, Rua Vera Paz Salé
, 68040255, Santarém, Pará, Brazil
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Luan Alexandre Martins de Sousa
Luan Alexandre Martins de Sousa
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
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Fernando Fernandes da Silva
*
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
Davis Carvalho de Oliveira
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
Roberto Dall'Agnol
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
2
Instituto Tecnológico Vale
, Belém, Pará, Brazil
João Orestes Schneider Santos
3
Fundação da Universidade Estadual do Amazonas, Avenida Gov. Danilo de Matos Areosa, 160 Distrito Industrial I
, Manaus, AM 69075-351, Brazil
Marco Antonio Galarza
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
Fabriciana Vieira Guimarães
4
Universidade Federal do Oeste do Pará, Instituto de Engenharia e Geociências/Curso de Geologia
, Rua Vera Paz Salé
, 68040255, Santarém, Pará, Brazil
Luan Alexandre Martins de Sousa
1
Grupo de Pesquisa Petrologia de Granitoides, Instituto de Geociências Programa de Pós-Graduação em Geologia e Geoquímica Universidade Federal do Pará
, CEP-66075-900, Belém, Pará, Brazil
*
Correspondence: [email protected]
Publisher: Geological Society of London
Received:
23 May 2024
Revision Received:
16 Nov 2024
Accepted:
27 Nov 2024
First Online:
20 Dec 2024
Online ISSN: 2041-479X
Print ISSN: 0016-7649
© 2025 The Author(s). Published by The Geological Society of London. All rights, including for text and data mining (TDM), artificial intelligence (AI) training, and similar technologies, are reserved. For permissions: https://www.lyellcollection.org/publishing-hub/permissions-policy. Publishing disclaimer: https://www.lyellcollection.org/publishing-hub/publishing-ethics
© 2025 The Author(s)
Journal of the Geological Society (2025) 182 (2): jgs2024-109.
Article history
Received:
23 May 2024
Revision Received:
16 Nov 2024
Accepted:
27 Nov 2024
First Online:
20 Dec 2024
Citation
Fernando Fernandes da Silva, Davis Carvalho de Oliveira, Roberto Dall'Agnol, João Orestes Schneider Santos, Marco Antonio Galarza, Fabriciana Vieira Guimarães, Luan Alexandre Martins de Sousa; Petrogenesis and tectonic settings of the Neoarchean A-type granitoid complex from the Carajás Province, Amazonian craton: constraints from geochemistry, SHRIMP U‒Pb zircon geochronology and Hf–Nd isotopes. Journal of the Geological Society 2025;; 182 (2): jgs2024–109. doi: https://doi.org/10.1144/jgs2024-109
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Index Terms/Descriptors
- A-type granites
- Amazonian Craton
- Archean
- Brazil
- Carajas mineral province
- chemical composition
- genesis
- granites
- hafnium
- Hf-177/Hf-176
- igneous rocks
- intrusions
- ion probe data
- isotope ratios
- isotopes
- Lu/Hf
- magmatism
- mass spectra
- metals
- microstructure
- monzogranite
- Nd-144/Nd-143
- Neoarchean
- neodymium
- Para Brazil
- plutonic rocks
- plutons
- Precambrian
- rare earths
- SHRIMP data
- Sm/Nd
- South America
- spectra
- stable isotopes
- tectonics
- U/Pb
- whole rock
- Sapucaia Domain
- Vila Jussara Complex
Latitude & Longitude
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