Mesoarchean sanukitoid rocks of the Rio Maria Granite-Greenstone Terrane, Amazonian craton, Brazil

Oliveira, M. A.; Dall’Agnol, Roberto; Althoff, Fernando Jacques; Leite, Albano Antonio da Silva

doi:10.1016/j.jsames.2008.07.003

Cited by 114 publications

(91 citation statements)

References 47 publications

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“…However, it is evident that the lower Mg number and P 2 O 5 contents and higher K 2 O/Na 2 O ratios of all potassic granites in this study are comparable to typical Phanerozoic high Ba-Sr granites ( Fig. 10a-c; Tarney and Jones, 1994;Fowler et al, 2001;Moyen et al, 2001Moyen et al, , 2003Qian et al, 2003;Fowler et al, 2008;Ye et al, 2008;Choi et al, 2009), and are distinct from Archean sanukitoids and the Closepet-type granites (e.g., Smithies and Champion, 2000;Halla, 2005;Kovalenko et al, 2005;de Oliveira et al, 2009;Martin et al, 2009;de Oliveira et al, 2010). They are also distinguishable from the late Archean sanukitoids and adakitic intrusions in the study area (see Fig.…”

Section: Petrological Classificationsupporting

confidence: 46%

“…Although these potassic granitic rocks are only a minor component of Archean granite-greenstone terranes, they nonetheless comprise a significant part of the Archean crust (Sutcliffe et al, 1990) and have a disproportionate tectonic importance. Studies have demonstrated that most of the late potassic granitoids, especially the sanukitoids and the Closepet-type granites (e.g., Frost et al, 1998;Jayananda et al, 2000;Smithies and Champion, 2000;Moyen et al, 2001Moyen et al, , 2003Halla, 2005;Lobach-Zhuchenko et al, 2005;de Oliveira et al, 2009;Martin et al, 2009;Moyen, 2011), originated directly from an enriched lithospheric mantle rather than by reworking (partial melting) of earlier TTG. Hence, these potassic high Ba-Sr granitoids carry important clues as to their source, petrogenesis and mechanisms of continental crustal formation and crustal evolution in the Archean (e.g., Taylor and McLennan, 1985;Rudnick, 1995).…”

mentioning

confidence: 99%

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Late Neoarchean potassic high Ba–Sr granites in the Taishan granite–greenstone terrane: Petrogenesis and implications for continental crustal evolution

Peng

Wilde

et al. 2013

Chemical Geology

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Section: Petrological Classificationsupporting

confidence: 46%

mentioning

confidence: 99%

Late Neoarchean potassic high Ba–Sr granites in the Taishan granite–greenstone terrane: Petrogenesis and implications for continental crustal evolution

Peng

Wilde

et al. 2013

Chemical Geology

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“…Global distribution of exposed Archean crust is in gray (modified after Bleeker 2003). Sanukitoid magmatism is found in the Karelian craton (Heilimo et al 2013 and references therein), the Pilbara craton (Smithies and Champion 2000), the Superior craton (Stern and Hanson 1991;Davis et al 2005), the Dharwar craton (Moyen et al 2001 and references therein), the Kalahari craton (Zeh et al 2009), the Amazonia craton (de Oliveira et al 2009), the North China craton (Ma et al 2013), and the Rae craton (this study).…”

Section: Conditions Of Emplacementmentioning

confidence: 65%

Neoarchean Mantle-derived Magmatism within the Repulse Bay Block, Melville Peninsula, Nunavut: Implications for Archean Crustal Extraction and Cratonization

LaFlamme

McFarlane

Corrigan

2015

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SUMMARYThe Repulse Bay block (RBb) of the southern Melville Peninsula, Nunavut, lies within the Rae craton and exposes a large (50,000 km 2 ) area of middle to lower crust. The block is composed of ca. 2.86 Ga and 2.73-2.71 Ga tonalite-trondhjemitegranodiorite (TTG) and granitic gneiss that was derived from an older 3.25 and 3.10 Ga crustal substrate. This period of crustal generation was followed by the emplacement of ca. 2.69-2.66 Ga enderbite, charnockite, and granitoid intrusions with entrained websterite xenoliths. These voluminous batholith-scale bodies (dehydrated and hydrated intrusions), and the associated websterite xenoliths, have similar whole rock geochemical properties, including fractionated light rare earth element (LREE)-heavy (H)REE whole rock patterns and negative Nb, Ti, and Ta anomalies. Dehydrated intrusions and websterite xenoliths also contain similar mineralogy (two pyroxene, biotite, interstitial amphibole) and similar pyroxene trace element compositions. Based on geochemical and mineralogical properties, the two lithologies are interpreted to be related by fractional crystallization, and to be the product of a magmatic cumulate processes. Reworking of the crust in a ca. 2.72 Ga subduction zone setting was followed by ca. 2.69 Ga upwelling of the asthenospheric mantle and the intrusion of massif-type granitoid plutons. Based on a dramatic increase in FeO, Zr, Hf, and LREE content of the most evolved granitoid components from the 2.69-2.66 Ga cumulate intrusion, we propose that those granitoid plutons were in part derived from a metasomatized mantle source enriched by fluids from the subducting oceanic slab that underwent further hybridization (via assimilation) with the crust. Large-scale, mantle-derived Neoarchean sanukitoid-type magmatism played a role in the development of a depleted lower crust and residual sub-continental lithospheric mantle, a crucial element in the preservation of the RBb. RÉSUMÉ

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“…É formado por Greenstone belts (Supergrupo Andorinhas) e por cinco grupos principais de granitoides arqueanos (Pimentel e Machado, 1994;Macambira e Lafon, 1995;Althoff et al, 2000, Leite, 2001Leite et al, 2004;Dall'Agnol et al, 2006;Oliveira et al, 2009;Almeida et al, 2010Almeida et al, , 2011 Durante o Paleoproterozoico, mais precisamente em torno de 1880 Ma, o DRM foi palco de um amplo magmatismo granítico anorogênico, que afetou as suas diferentes unidades litoestratigráficas. Os granitos tipo A oxidados, intrusivos em rochas arqueanas do DRM, foram agrupados na Suíte Jamon, e os granitos tipo A moderadamente reduzidos, intrusivos em rochas arqueanas da bacia Carajás, foram englobados na Suíte Serra dos Carajás (Dall'Agnol et al, 1999, 2006.…”

Section: Domínio Rio Mariaunclassified

Evolução da região de Santana do Araguaia (PA) com base na geologia e geocronologia Pb-Pb em zircão de granitoides

Corrêa

Macambira

2014

Geol. USP, Sér. cient.

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Disponível on-line no endereço www.igc.usp.br/geologiausp -45 -Resumo A região de Santana do Araguaia, foco deste trabalho, localiza-se no sudeste do Estado do Pará, que, por sua vez, fica no sudeste do Cráton Amazônico. Sob o ponto de vista tectônico, posiciona-se no Domínio Santana do Araguaia, interpretado como um terreno arqueano afetado pelo Ciclo Transamazônico. Um estudo petrográfico e geocronológico, com suporte de dados de campo, foi empreendido em granitoides da região com o intuito de desvendar a evolução desse domínio. Em termos modais, as rochas estudadas compõem-se de biotita monzogranito, biotita metagranodiorito, hornblenda-biotita granodiorito, hornblenda-biotita metatonalito e enderbito. Essas rochas apresentam-se não deformadas a moderadamente deformadas, com algumas particularidades: o biotita metagranodiorito apresenta foliação seguindo um trend E-W; o hornblenda-biotita metatonalito possui uma foliação seguindo a direção NW-SE, com mergulhos normalmente altos a subverticais; o biotita monzogranito é isotrópico e os litotipos hornblenda-biotita granodiorito e enderbito apresentam apenas uma leve orientação de seus cristais, perceptível principalmente em lâmina delgada. Esses litotipos foram analisados pelo método de evaporação de Pb de zircão, tendo sido obtidas as seguintes idades: biotita metagranodiorito, 3066 ± 3 Ma e 2829 ± 13 Ma, hornblenda-biotita metatonalito, 2852 ± 2 Ma; biotita monzogranito (ML-08), 2678 a 2342 Ma; hornblendabiotita granodiorito, 1990 ± 7 Ma; e enderbito, 1988 ± 4 Ma. Os dados geocronológicos indicam que as rochas cristalizaram tanto no Arqueano quanto no Paleoproterozoico, contudo, não foram detectadas evidências que comprovem a ação do Ciclo Transamazônico na região.Palavras-chave: Santana do Araguaia; Granitoides; Geocronologia; Arqueano; Paleoproterozoico. AbstractThe region of Santana do Araguaia, focus of this study, is located in the southeast of Pará State, which, in its turn, lies in the southeastern Amazonian Craton. From the tectonic point of view, it is positioned in the Domain Santana do Araguaia, interpreted as an Archean terrain affected by the Transamazonic Cycle. A petrographic and geochronological study, supported by field data, was undertaken in granitoids of the region in order to unravel the evolution of this field. In modal terms, the studied rocks consist of biotite monzogranite, biotite metagranodiorite, hornblende-biotite granodiorite, hornblende-biotite metatonalite and enderbite. These rocks present themselves undeformed to moderately deformed, with some particularities: the biotite metagranodiorite presents foliation following an E-W trend; the hornblende-biotite metatonalite has a foliation following the NW-SE direction, usually with high to subvertical dives, the biotite monzogranite is isotropic, and lithologies hornblende-biotite granodiorite and enderbite show only a slight orientation of their crystals, mainly noticeable in thin section. These rock types were analyzed by evaporating Pb zircon method and the following ages were obt...

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Mesoarchean sanukitoid rocks of the Rio Maria Granite-Greenstone Terrane, Amazonian craton, Brazil

Cited by 114 publications

References 47 publications

Late Neoarchean potassic high Ba–Sr granites in the Taishan granite–greenstone terrane: Petrogenesis and implications for continental crustal evolution

Late Neoarchean potassic high Ba–Sr granites in the Taishan granite–greenstone terrane: Petrogenesis and implications for continental crustal evolution

Neoarchean Mantle-derived Magmatism within the Repulse Bay Block, Melville Peninsula, Nunavut: Implications for Archean Crustal Extraction and Cratonization

Evolução da região de Santana do Araguaia (PA) com base na geologia e geocronologia Pb-Pb em zircão de granitoides

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