Roberto Dall’Agnol

Universidade Federal do Pará

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Prafulla Kumar Sahoo

Central University of Punjab

Gabriel Negreiros Salomão

Vale Technological Institute

Cláudio Nery Lamarão

Universidade Federal do Pará

Davis Carvalho de Oliveira

Universidade Federal do Pará

Pedro Walfir Martins e Souza Filho

Vale (Brazil)

Moacir José Buenano Macambira

Universidade Federal do Pará

José Tasso Felix Guimarães

Vale (Brazil)

Régis Munhoz Krás Borges

Universidade Federal do Pará

José de Arimatéia Costa de Almeida

Harefield Hospital

Hilton Túlio Costi

Museu Paraense Emílio Goeldi

Cooperative Institutions

Universidade Federal do Pará

Vale Technological Institute

Vale (Brazil)

Instituto de Geociencias

Universidade de São Paulo

National Council for Scientific and Technological Development

Instituto de Desenvolvimento Sustentável Mamirauá

Centre National de la Recherche Scientifique

Universidade de Brasília

Serviço Geológico do Brasil - CPRM

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Geologia, petrografia e geoquímica do Leucogranodiorito Pantanal e dos leucogranitos arqueanos da área a norte de Sapucaia, Província Carajás, Pará: implicações petrogenéticas

Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais (2013)

Mayara Fraeda Barbosa Teixeira Roberto Dall’Agnol Alice Cunha da Silva Patrick Araújo dos Santos

Na porção leste do Subdomínio de Transição, porção sul do Domínio Carajás, afloram leucogranodioritos (Leucogranodiorito Pantanal), aparentemente alojados em uma associação TTG (Trondhjemito Colorado, ~2,87 Ga) e seccionados em sua porção oeste por leucogranitos deformados. O Leucogranodiorito Pantanal tem afinidade cálcio-alcalina peraluminosa, enriquecimento em Ba e Sr, e padrões de ETR sem anomalias expressivas de Eu e acentuado fracionamento de ETRP. Suas altas razões La/Yb sugerem ter sido derivado de magmas gerados em condições equivalentes ao campo de estabilidade da granada (1,0 a 1,5 GPa), como também sugerido para a Suíte Guarantã (~2,87 Ga) do Domínio Rio Maria. Sua origem pode estar relacionada à fusão discreta de rochas TTG e/ou interação destas com fluidos enriquecidos em K, Sr e Ba, derivados do manto metassomatizado. Os leucogranitos revelam assinatura geoquímica de granitos tipo-A reduzidos, possivelmente originados a partir da fusão desidratada de rochas cálcio-alcalinas peraluminosas durante o Neoarqueano. Além dessas unidades, foi descrito na porção leste do Leucogranodiorito um hornblenda-biotita-granito afim geoquimicamente aos granitos tipo-A oxidados, correlacionado à Suíte Vila Jussara, também neoarquena. Este trabalho sugere que a porção estudada pode apresentar ligação evolutiva com o Domínio Rio Maria, tendo sido afetada por eventos de retrabalhamento crustal durante o Neoarqueano.

10.46357/bcnaturais.v8i3.552

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Citations (7)

Morphology and composition of zircons in rare metal granites from Brazilian tin provinces

Journal of South American Earth Sciences (2018)

Cláudio Nery Lamarão Gisele Tavares Marques Davis Carvalho de Oliveira Hilton Túlio Costi Régis Munhoz Krás Borges

Prospecting

10.1016/j.jsames.2018.03.003

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Citations (10)

Crystallization parameters and thermodynamic modeling of the Igarapé Gelado suite: Implications for the Neoarchean magmatism of the Carajás province, Brazil

Journal of South American Earth Sciences (2025)

Caio José Soares Mesquita Roberto Dall’Agnol Arthur Santos da Silva Neri Ingrid Roberta Viana da Cunha José de Arimatéia Costa de Almeida

10.1016/j.jsames.2025.105357

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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 (2024)

Fernando Fernandes da Silva Davis Carvalho de Oliveira Roberto Dall’Agnol João Orestes Schneider Santos Marco Antônio Galarza

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 along the E‒W direction with high-angle foliations (75-85°) that follow a regional trend. These plutons are formed mainly by seriated biotite–hornblende monzogranite (BHM). Subordinated varieties are biotite–hornblende tonalite (BHT), biotite granite (BG), and hornblende–biotite granite (HBG). Regarding the geochemical features, these granitoids can be distinguished by the Fe* index [FeOt/(FeOt/MgO) ratio]. The BHM presents moderate to high values of this ratio and can be characterized as oxidized and reduced ferroan A-type granites. The BG and HBG are porphyritic granitoids and are transitional between oxidized granites and slightly magnesian granites. In contrast, the BHT has lower and restricted FeOt/(FeOt/MgO) ratios and magnesian characteristics. Sensitive high-resolution ion microprobe (SHRIMP) U-Pb dating results in ages of 2743±11 Ma for the oxidized BHM, the age of 2745±20 Ma for the reduced BHM, age of 2742±14 Ma for the HBG and the age of 2766 ± 9.6 Ma for BHT. The Nd and Hf isotopic data suggest that the magmas of the Vila Jussara suite present a slight crustal contribution with ± contamination [ ε Nd (t) values are mostly between −3.62 and +1.55 and ε Hf (t) values are between −4.77 and +1.78] and were derived from rocks of Meso to Paleoarchean age (2.82<T DM <3.45 Ga). The petrogenetic model that was adopted to ascertain the primary magmas of this suite reveals source rocks that are geochemically similar to Mesoarchean granulites from the Canaã dos Carajás domain. The emplacement of Neoarchean granites occurred by multiple injections of magmas, generating extensive hybridization under a transpressional/transtensional tectonic regime dominated by pure shear and resulting in a syntectonic postcollisional setting of these rocks.

Hornblende

Porphyritic

Geochronology

Batholith

Petrogenesis

10.1144/jgs2024-109

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Geochemistry of upland lacustrine sediments from Serra dos Carajás, Southeastern Amazon, Brazil: Implications for catchment weathering, provenance, and sedimentary processes

Journal of South American Earth Sciences (2016)

Prafulla Kumar Sahoo José Tasso Felix Guimarães Pedro Walfir Martins e Souza Filho Marcio Sousa da Silva Clóvis Maurity

Laterite

10.1016/j.jsames.2016.09.003

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Citations (32)

Precambrian granitic magmatism in Brazil

Episodes (1999)

Alcídes N. Sial Roberto Dall’Agnol Valderez P. Ferreira Lauro Valentim Stoll Nardi Márcio Martins Pimentel

Granitic rock

10.18814/epiiugs/1999/v22i3/006

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Citations (14)

Phase separation, fluid mixing, and origin of the greisens and potassic episyenite associated with the Água Boa pluton, Pitinga tin province, Amazonian Craton, Brazil

Journal of South American Earth Sciences (2008)

Régis Munhoz Krás Borges Raimundo Netuno Villas Kazuo Fuzikawa Roberto Dall’Agnol M. A. Pimenta

Greisen

10.1016/j.jsames.2008.11.006

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Citations (23)

Magnetic petrology of the Neoarchean granitoids in the Vila Jussara Suite, Carajás Province, Amazonian Craton

Brazilian Journal of Geology (2022)

Luan Alexandre Martins de Sousa Roberto Dall’Agnol Ingrid Roberta Viana da Cunha Fernando Fernandes da Silva Davis Carvalho de Oliveira

The Vila Jussara Suite (VJS) is formed by Neoarchean (~ 2.75 Ga) granites that are located in the Sapucaia Domain of the Carajás Province (CP), Amazonian Craton. Four petrographic varieties were identified in the VJS: biotite-hornblende monzogranite (BHMzG); biotite-hornblende tonalite (BHTnl); biotite monzogranite (BMzG); and hornblende-biotite granodiorite (HBGd). In terms of magnetic signature, BHMzG has two subgroups: the first subgroup has low magnetic susceptibility (MS) values (0.16 × 10-3 to 0.81 × 10-3) and more commonly contains ilmenite with titanite rims; the second subgroup shows moderate to high MS (1.91 × 10-3 to 6.02 × 10-3) and magnetite dominant over ilmenite. BHTnl has moderate MS (0.85 × 10-3 to 1.36 × 10-3) and dominance of pyrite followed by magnetite. BMzG and HBGd have comparatively high MS (3.35 × 10-3 to 19.3 × 10-3 and 2.14 × 10-3 to 25.0 × 10-3, respectively), with magnetite dominant over pyrite. The granite varieties of the VJS were formed under different oxygen fugacity (fO2) conditions, varying from reducing (< fayalite-magnetite-quartz (FMQ)) to oxidizing conditions (nickel-nickel oxide (NNO) to NNO+1). In addition, biotite-hornblende syenogranite occurs subordinately and shows high MS values and extremely high FeOt/(FeOt + MgO) ratios, both in whole-rock and amphibole and biotite. The granites of the VJS are similar to other Neoarchean granites of the Carajás province. The reduced VJS granites are akin to the ferroan granites of Planalto suite, Estrela Complex and Vila União area and the magnesian granites of VJS approach the magnesian granites of Vila União area.

Hornblende

Titanite

Ilmenite

Mineral redox buffer

10.1590/2317-4889202220210071

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Citations (1)

Suscetibilidade magnética : um indicador da evolução petrológica de granitóides da Amazônia

Brazilian Journal of Geology (1994)

Marilia Sacramento de Magalhães Roberto Dall’Agnol William A. Sauck José Gouvêa Luíz

Estudos de suscetibilidade magnetica (SM) e de minerais opacos de rochas graniticas da Amazonia permitiram discutir a relacao entre as variacoes do comportamento magnetico e os processos que ocorreram durante a evolucao dessas rochas. Os granitos mineralizados em cassiterita, Antonio Vicente, Mocambo, Velho Guilherme, Agua Boa, Madeira e Pedra Branca, apresentam SM baixa, sendo que os valores mais baixos de SM ocorrem em suas facies mais transformadas, especializadas em Sn. Os valores reduzidos de SM dessas rochas podem ser atribuidos as condicoes de fugacidade de oxigenio (fO2) relativamente redutoras durante a sua evolucao magmatica e, em parte, a sua derivacao'a partir de liquidos muito evoluidos. Os granitos Musa (Gmu) e Jamon (Gj) apresentam SM elevada, refletindo conteudos expressivos de magnetita que decrescem, como a SM, no sentido da diferenciacao magmatica (facies com anfibolio —> facies a biotita —» leucogranitos). Estas rochas devem ter se formado em condicoes de fO2 relativamente elevadas, proximas as dos tampoes NNO e HITMQ. O Granito Cigano (Gcg) e o Granodiorito Rio Maria (GDrm) apresentam variacao ampla de SM. No Gcg, as condicoes de fO2mais baixas que as do tampao NNO e superiores a FMQ devem ser a causa para este tipo de comportamento magnetico. No GDrm, esse tipo de distribuicao dos dados magneticos e consequencia da neoformacao de magnetita nas porcoes proximas ao seu contato com intrusoes graniticas do Proterozoico (Gmu e Gj), uma vez que em porcoes mais afastadas do contato, a SM e predominantemente mais baixa.

10.5327/rbg.v24i1.500

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Citations (9)

GEOCHEMISTRY AND PETROGENESIS OF METAVOLCANIC ROCKS FROM ARCHAEAN GREENSTONE BELTS: RIO MARIA REGION (SOUTHEAST PARÁ, BRAZIL)

Brazilian Journal of Geology (1997)

Zorano Sérgio de Souza Roberto Dall’Agnol Claudinei Gouveia de Oliveira Sérgio Roberto Bacelar Hühn

The Rio Maria region, located at about 250 km south of the Carajas Ridge, is a well preserved typical Archaean (> 2.87 Ga) granite - greenstone terrane. Supracrustal sequences are made up of meta-ultramafic rocks (UM - talc-tremolite schists with relict spinifex textures) at the base, followed by metabasic rocks (BAS – massif basalts with quenched textures; GB - porphyritic gabbros) and, at the top, metadacitic rocks (DAC) with plagioclase, quartz, hornblende and sphene phenocrysts. Terrigenous (graywackes, siltstones) and volcano-chemical metasediments (cherts, iron formations) are intercalated within the basal and intermediate stratigraphic levels. The volcanic rocks define three geochemical series, namely komatiite (UM), low-K tholeiite (BAS, GB) and sodic calc-alkaline (DAC). These series mainly evolved by low pressure fractional crystallization giving respectively olivine + orthopyroxene, clinopyroxene + plagioclase and plagioclase + quartz + alkali feldspar + hornblende + biotite + sphene cumulates. Modeling based on major and REE indicate a Iherzolitic source with 1-5% garnet; the degree of partial melting is from 10 to 25% in order to generate the komatiitic and tholeiitic magmas. The source of dacitic volcanism could be a metasomatised tholeiitic crust transformed into garnet arnphibolite, melted from 10 to 15% and leaving a residue with hornblende, plagioclase, garnet and clinopyroxene. The source types and the trace elements characteristics allow to consider that the magma generated in marginal basins and island arcs geodynamic environments. Consequently, the calc-alkaline magmatism (volcanism at ca. 2.97-2.90 Ga and plutonism at ca. 2.87 Ga) would represent a stage of tectonic stabilization and welding of crustal blocks, forming the continental crust which acted as cratonic basement for the Neoarchaean evolution of the northern portion of the Carajas Mineral Province

Phenocryst

Hornblende

10.5327/rbg.v27i2.585

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Citations (5)