Estudo de proveniência em sequências supracrustais neoproterozóicas da Zona Transversal, Província Borborema

Marulanda, Carolina Ojeda

doi:10.11606/d.44.2013.tde-03062015-092058

Cited by 1 publication

(3 citation statements)

References 24 publications

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“…The Western Cameroon domain, located west of the Tcholliré-Banyo shear zone, extends along the western border of Cameroon and consists of Neoproterozoic metavolcanosedimentary rocks of the arc-related Poli Group, formed between 830 and 665 Ma (Toteu et al 2006, Ngako et al 2008, Bouyo Houketchang et al, 2009, 2013 intruded by pre-, syn-and late-tectonic Pan-African granitoids of mainly calc-alkaline composition of 660 to 580 Ma and post-tectonic alkaline granitoids. These are superposed by molassic basins of the Mangbaï-type (Béa 1990, Montes-Lauar et al 1997.…”

Section: The Central African Orogen (Cameroon Chad and Central Africa...mentioning

confidence: 99%

“…The PAB belt is composed of a metavolcanosedimentary unit (Cachoeirinha Group; Medeiros and Jardim de Sá 2009) with a lower metaconglomerate unit (Serra dos Olhos D'água Formation) and younger detrital zircon grains at 880 Ma (Marulanda 2013), and an upper metagreywacke succession (Santana dos Garrotes Formation) with younger detrital zircon grains at ca. 650 Ma (Brito Neves and Campos Neto 2016) and felsic metavolcanic intercalations dated by U-Pb on zircon at ca.…”

Section: Eastern Transversal Zone (Alto Pajeú-alto Moxotó-rio Capibar...mentioning

confidence: 99%

“…640 Ma and continental collision at 640-580 Ma (Ngako et al 2008). U-Pb (TIMS-ID and SIMS) and Sm-Nd dating of metamorphic zircon rims and garnet-whole rock pairs give ages ranging between 594 and 604 Ma, interpreted as the time of HP granulite-facies metamorphism in north-central Cameroon (Bouyo Houketchang et al 2009, 2013.…”

Section: Eastern Transversal Zone (Alto Pajeú-alto Moxotó-rio Capibar...mentioning

confidence: 99%

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Toward an integrated model of geological evolution for NE Brazil-NW Africa: The Borborema Province and its connections to the Trans-Saharan (Benino-Nigerian and Tuareg shields) and Central African orogens

et al. 2020

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Both the Borborema Province of NE Brazil and the geological provinces of NW Africa (the Trans-Saharan Orogen consisted of the Tuareg and Benino-Nigerian shields and the Central African Orogen of Cameroon, Chad, and Central African Republic) are complex geological regions with superposition of distinct deformational, metamorphic and magmatic events and final structural configuration during the Brasiliano/Pan-African Orogeny (ca. 625-510 Ma). These provinces represent the site of major mountain building processes in the Ediacaran/Cambrian transition that culminated in the amalgamation of West Gondwana after the collision of the West African-São Luís, São Francisco-Congo, and Saharan paleocontinents. In the last years, discovery and characterization of key tectonic units such as ophiolites, eclogites, HP/UHP rocks, and both oceanic and continental magmatic arcs are helping to clarify these processes and propose tectonic models for the geological evolution of NE Brazil-NW Africa. Connections of the marginal belts that frame these provinces, bordering the eastern margin of the West African-São Luís Craton (Médio Coreaú-Dahomeyides-Gourma-West Tuareg Shield) and the northern margin of the São Francisco-Congo Craton (Rio Preto-Riacho do Pontal-Sergipano-Yaoundé-Central African) are progressively better constrained, while correlations within the interior, highly reworked and sectioned portions of both the Borborema Province, the Benino-Nigerian Shield, the Central and East Tuareg Shield, Western Cameroon, and Adamawa-Yadé domains are more complicated and demand further investigation. Some of the questions of prime importance in this context are the continuation or not of the 1000-920 Ma Cariris Velhos Belt of NE Brazil into NW Africa, and if the basement-dominated North Borborema/Benino-Nigerian (NOBO-BENI) and Alto Pajeú-Alto Moxotó-Rio Capibaribe-Pernambuco-Alagoas/Adamawa-Yade (APAMCAPAY) domains could represent major decratonized blocks (such as LATEA in the Central Tuareg Shield), perhaps developed due to hyperextension and detachment of a Greater São Francisco-Congo paleocontinent northern margin. In this case, the Goiás-Pharusian and Transnordestino-Central African oceanic realms along with restricted internal oceans such as the hypothetical Piancó-Alto Brígida/Western Cameroon (PAB-WECA) Seaway probably separated these ancient paleocontinental blocks during the Neoproterozoic. The development of subduction zones and the docking of Neoproterozoic juvenile terranes welded the hyperextended Archean/Paleoproterozoic lithospheric fragments together and they became squeezed and reworked in between the major cratonic landmasses during the Brasiliano/Pan-African Orogeny. The quest for the sites of ancient oceans and continents that once composed NE Brazil and NW Africa goes on and tentative scenarios will surely benefit from novel geological, isotopic, and geochronological data put forward in the near future.

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Section: The Central African Orogen (Cameroon Chad and Central Africa...mentioning

confidence: 99%

Section: Eastern Transversal Zone (Alto Pajeú-alto Moxotó-rio Capibar...mentioning

confidence: 99%

Section: Eastern Transversal Zone (Alto Pajeú-alto Moxotó-rio Capibar...mentioning

confidence: 99%

See 1 more Smart Citation

Toward an integrated model of geological evolution for NE Brazil-NW Africa: The Borborema Province and its connections to the Trans-Saharan (Benino-Nigerian and Tuareg shields) and Central African orogens

et al. 2020

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show abstract

Estudo de proveniência em sequências supracrustais neoproterozóicas da Zona Transversal, Província Borborema

Cited by 1 publication

References 24 publications

Toward an integrated model of geological evolution for NE Brazil-NW Africa: The Borborema Province and its connections to the Trans-Saharan (Benino-Nigerian and Tuareg shields) and Central African orogens

Toward an integrated model of geological evolution for NE Brazil-NW Africa: The Borborema Province and its connections to the Trans-Saharan (Benino-Nigerian and Tuareg shields) and Central African orogens

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