2002
DOI: 10.5327/s1519-874x2002000100012
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Geocronologia e evolução crustal da área do depósito de Cu-Au Gameleira, Província Mineral de Carajás (Pará), Brasil

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Cited by 30 publications
(21 citation statements)
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“…7E), are geologically significant and imply the CuAu mineralization is coeval with the Igarapé Bahia host rocks, which have been dated at 2745 ± 1 Ma (Galarza and Macambira, 2002a;Galarza, 2002). The radiogenic Pb from the samples is interpreted as a result of U-decay, accumulated since the gold and associated chalcopyrite were formed primarily at 2744 ± 12 Ma.…”
Section: Pb-pb Geochronologymentioning
confidence: 96%
See 1 more Smart Citation
“…7E), are geologically significant and imply the CuAu mineralization is coeval with the Igarapé Bahia host rocks, which have been dated at 2745 ± 1 Ma (Galarza and Macambira, 2002a;Galarza, 2002). The radiogenic Pb from the samples is interpreted as a result of U-decay, accumulated since the gold and associated chalcopyrite were formed primarily at 2744 ± 12 Ma.…”
Section: Pb-pb Geochronologymentioning
confidence: 96%
“…Metabasalt intercalations are subordinate. Age determinations based on the Pb evaporation method on zircon crystals yield 2745 ± 1 Ma and 2747 ± 1 Ma (2r) for the mafic metavolcanic and metapyroclastic units, respectively (Galarza and Macambira, 2002a;Galarza, 2002). These rocks are invariably concordant and commonly show sharp contacts that are more noticeable between the clastic and chemical varieties.…”
Section: Geology Of the Igarapé Bahia Depositmentioning
confidence: 98%
“…As sequências metavulcanossedimentares do Domínio Carajás foram inicialmente agrupadas no Supergrupo Itacaiúnas (Docegeo 1988) com idades entre 2,76 e 2,73 Ga (Machado et al 1991, Galarza 2002b, Galarza & Macambira 2002a, Santos 2002, Pimentel et al 2003. Entretanto, Vasquez et al (2008) ) é composta por granitoides sódicos de assinatura tholeíitica, que apresentam idades U-Pb de 2.765±39 Ma (Sardinha et al 2004) e 2.750±5 Ma .…”
Section: Respectivamente)unclassified
“…O Grupo Igarapé Bahia (2.747 ± 1 Ma Pb-Pb zircão; Galarza & Macambira, 2002) tem sua ocorrência bastante restrita à área de ocorrência do depósito Igarapé Bahia/Alemão, sendo considerado como uma janela estrutural aflorante na Formação Águas Claras. É constituído por rochas rochas metassedimentares (metapelitos, metarritmitos), metavulcânicas máficas (metabasalto, diabásio), metapiroclásticas ácidas a intermediárias com acamadamento gradacional e formações ferríferas (DOCEGEO,1988).…”
Section: Figura 43 Mapa Geológico Do Domínio Carajás Província Minunclassified