The Gurupi Belt, northern Brazil: Lithostratigraphy, geochronology, and geodynamic evolution

Klein, Evandro Luíz; Moura, Cândido Augusto Veloso; Krymsky, R. Sh.; Griffin, William L.

doi:10.1016/j.precamres.2005.08.003

Cited by 32 publications

(58 citation statements)

References 36 publications

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“…15) also shows that all the new results fall within the field corresponding to juvenile Paleoproterozoic crust of the São Luís Craton, compiled from the data of Klein et al (2005aKlein et al ( , 2012.…”

Section: U-pb Geochronologysupporting

confidence: 62%

“…The deformation and metamorphic transformations are related to the collisional tectonic Transamazonian orogenesis in the Rhyacian period in other regions of the São Luís and Amazonian cratons. Klein et al (2005aKlein et al ( , 2012. The Rosário Suite is part of an extensive Rhyacian continental juvenile magmatic arc which is found in other parts of the São Luís Craton, which in the literature has been considered a fragment of the West African Craton.…”

Section: Discussionmentioning

confidence: 99%

“…The Gurupi Belt is interpreted as a Neoproterozoic-early Cambrian orogen with NNW-SSE orientation, developed in the south-southwestern margin of the São Luís Craton (Almeida et al 1976, Abreu et al 1980Costa 2000, Klein et al 2005a. The belt and its reworked basement include rock units of varied nature and ages ranging from Archean to Eocambrian (Klein et al 2005b, Palheta et al 2009).…”

Section: Regional Geology Contextmentioning

confidence: 99%

“…The Negra Velha Granite (2056-2,076 Ma) consists of small granitic bodies intruded into the Tromaí Granitic Suite and associated with felsic volcanic and pyroclastic rocks of the same age (Klein et al , 2009). The Caxias Microtonalite, with age of 2009 ± 11 Ma (Klein et al 2014), represents the youngest magmatic plutonic activity of this cratonic area.The Gurupi Belt is interpreted as a Neoproterozoic-early Cambrian orogen with NNW-SSE orientation, developed in the south-southwestern margin of the São Luís Craton (Almeida et al 1976, Abreu et al 1980Costa 2000, Klein et al 2005a. The belt and its reworked basement include rock units of varied nature and ages ranging from Archean to Eocambrian (Klein et al 2005b, Palheta et al 2009).…”

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confidence: 99%

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Rhyacian evolution of the eastern São Luís Craton: petrography, geochemistry and geochronology of the Rosário Suite

et al. 2017

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ABSTRACT:The São Luís Cráton comprises an area between northeast Pará state and northwest Maranhão that exposes Paleoproterozoic granitic suites and meta-volcanosedimentary sequences. In the east of this geotectonic unit, about 70 km south of São Luís, there is a portion of the São Luís Craton, represented by the intrusive Rosario Suite (RS). This work is focused on rocks of this suite, including petrographic, lithochemical and geochronological studies to understand the crustal evolution of these granitoid rocks. The rock spectrum varies from tonalitic to granodioritic, quartz dioritic and granitic compositions, and there are partial structural and mineralogical changes related to deformation along transcurrent shear zones. The geochemical studies show granitic metaluminous compositions of the calc-alkaline series with I-type affinity typical of magmatic arc. Rare earth elements show marked fractionation and slight Eu positive or negative anomalies (Eu/Eu* = 0.82 to 1.1). Zircon U-Pb data provided consistent ages of 2165 ± 7 Ma, 2170 ± 7 Ma, 2170 ± 7 Ma, 2161 ± 4 Ma and 2175 ± 8 Ma, dating emplacement of these granitoids as Paleoproterozoic (Rhyacian). Sm-Nd isotopic data provided model ages (T DM ) of 2.21 to 2.31 Ga with positive values of εNd +1.9 to +3.2 (t = 2.17 Ga), indicating predominantly Rhyacian crustal sources for the parental magmas, similar to those ones found in other areas of the São Luís Craton. The data, integrated with published geological and geochronological information, indicate the occurrence of an important continental crust formation event in this area. The Paleoproterozoic evolution between 2.17 and 2.15 Ga is related to the Transamazonian orogeny. The granitoids of the Rosario Suite represent the main phase of continental arc magmatism that has continuity in other parts of the São Luís Craton and can be correlated with Rhyacian accretionary magmatism in the northwestern portion of the Amazonian Craton that amalgamated Archean terrains during the Transamazonian orogeny.KEYWORDS: Rosário Suite; São Luís Craton; Petrology; U-Pb geochronology; Sm-Nd T DM . RESUMO: O Cráton INTRODUCTIONIn models of global supercontinent reconstruction, the São Luís Craton and the northeastern portion of the Amazonian Craton (to the east of the Guayana Shield) have been considered remnants of the West African Craton preserved in the northern South American Platform after the breakup of the Pangea Supercontinent (Hurley et al. 1967, Torquato & Cordani 1981, Lesquer et al. 1984, Brito Neves et al. 2000.On the African side, several studies based on structural, geochemical, geophysical and geochronological data demonstrate the existence of Archean and dominantly juvenile Paleoproterozoic crust (Abouchami et al. 1990, Boher et al. 1992, Gasquet et al. 2003. On the Brazilian side, the northern part of the Amazonian Craton and São Luís Craton have demonstrated geochronological and evolutionary similarities. In this part of the Amazonian Craton, the ancient continental crust stabilized in the Archean is bordered by...

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Section: U-pb Geochronologysupporting

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Section: Regional Geology Contextmentioning

confidence: 99%

mentioning

confidence: 99%

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Rhyacian evolution of the eastern São Luís Craton: petrography, geochemistry and geochronology of the Rosário Suite

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“…3); it shows metamorphosed supracrustal and plutonic units originally formed in Archaean, Palaeoproterozoic and Neoproterozoic times (Klein & Moura 2001;Moura et al 2003;Klein et al 2005b). With the exception of some rounded granite stocks, most of the sequences of the Gurupi Belt form elongated bodies parallel to NW-SE cross-cutting structures.…”

Section: The Gurupi Beltmentioning

confidence: 97%

São Luís Craton and Gurupi Belt (Brazil): possible links with the West African Craton and surrounding Pan-African belts

Klein

Moura

2008

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The São Luís Craton and the Palaeoproterozoic basement rocks of the Neoproterozoic Gurupi Belt in northern Brazil are part of an orogen having an early accretionary phase at 2240-2150 Ma and a late collisional phase at 2080 + 20 Ma. Geological, geochronological and isotopic evidence, along with palaeogeographic reconstructions, strongly suggest that these Brazilian terrains were contiguous with the West African Craton in Palaeoproterozoic times, and that this landmass apparently survived subsequent continental break-up until its incorporation in Rodinia.The Gurupi Belt is an orogen developed in the southern margin of the West African-São Luís Craton at c. 750-550 Ma, after the break up of Rodinia. Factors such as present-day and possible past geographical positions, the timing of a few well-characterized events, the structural polarity and internal structure of the belt, in addition to other indirect evidence, all favour correlation between the Gurupi Belt and other Brasiliano/Pan-African belts, especially the Médio Coreaú domain of the Borborema Province and the Trans-Saharan Belt of Africa, despite the lack of proven physical links between them. These Neoproterozoic belts are part of the branched system of orogens associated with amalgamation of the Amazonian, West Africa-São Luís, São Francisco and other cratons and minor continental blocks into the West Gondwana supercontinent.

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Fluid inclusion and stable isotope (O, H, C, and S) constraints on the genesis of the Serrinha gold deposit, Gurupi Belt, northern Brazil

et al. 2006

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The Gurupi Belt, northern Brazil: Lithostratigraphy, geochronology, and geodynamic evolution

Cited by 32 publications

References 36 publications

Rhyacian evolution of the eastern São Luís Craton: petrography, geochemistry and geochronology of the Rosário Suite

Rhyacian evolution of the eastern São Luís Craton: petrography, geochemistry and geochronology of the Rosário Suite

São Luís Craton and Gurupi Belt (Brazil): possible links with the West African Craton and surrounding Pan-African belts

Fluid inclusion and stable isotope (O, H, C, and S) constraints on the genesis of the Serrinha gold deposit, Gurupi Belt, northern Brazil

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