Correlação Do Magmatismo Das Bacias Da Margem Continental Brasileira Com O Das Áreas Emersas Adjacentes

Almeida, Frederico de; Carneiro, Celso Dal Ré; Mizusaki, Ana Maria Pimentel

doi:10.25249/0375-7536.19963125138

Cited by 57 publications

(36 citation statements)

References 18 publications

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“…From that period to the present continental drift has occurred between these two continents, with peaks of magmatic activities in the Eocene and Oligocene. In some cases, such activity was a consequence of hot spots, such as that responsible for the alignment between the Poços de Caldas/Cabo Frio continental alkaline rocks to the volcanic chain of Vitória/Trindade in the offshore area of southeastern Brazil (Almeida et al, 1996;Thomaz-Filho & Rodrigues, 1999;Thomaz-Filho et al, 2000). Recently, an alternative nonplume related heat source for the generation of intracontinental magmatic provinces has been proposed to explain the occurrence of magmatic bodies in South America (Ernesto et al, 2002).…”

Section: Tectonic Evolution Of the Eastern Margin Of South Americamentioning

confidence: 99%

Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

2006

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Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin Alexandre Cunha RibeiroThe eastern Brazilian coastal drainages are of great biogeographical significance, because of their highly endemic fish faunas. Phylogenetic patterns suggest a close biotic relationship between the rivers that flow into the Atlantic and those on the adjacent upland crystalline shield. However, little has been said on the dynamics of the geological processes causally related to the cladogenetic events between these areas. Distributional and phylogenetic patterns suggest a close association with the geological history of the passive continental margin of South America, from the Cretaceous to the present day. In this area megadome uplifts, rifting, vertical movements between rifted blocks and the erosive retreat of the South American eastern continental margin are hypothesized as the main geological forces controlling the distribution of freshwater fishes. The tectonic activity associated with the break-up of Gondwana and separation of South America and Africa formed six megadomes that control most of the current courses of the main crystalline shield river basins. Except for basins located at the edges of such megadomes, these river systems developed long, circuitous routes over the ancient Brazilian crystalline shield before emptying into the recently opened Atlantic Ocean. Initial cladogenetic events between upland crystalline drainages and Atlantic tributaries were probably associated with vicariant processes, and some ancient basal sister-groups of widespread inclusive taxa are found in these coastal hydrographic systems. Later, generalized erosive denudation resulted in an isostatic adjustment of the eastern margin of the platform. These, along with reactivations of ancient rifts led to vertical movements between rifted blocks and gave rise, in southeastern Brazil, to taphrogenic (rift related) basins. These basins, such as the Taubaté, São Paulo, Curitiba and Volta Redonda basins, among others, captured adjacent upland drainages and fauna. The fossil fishes from the Tremembé Formation (Eocene-Oligocene of Taubaté Basin) exemplify this process. Other taphrogenic systems of Tertiary age were also identified in other segments of the Atlantic continental margin, such as in Borborema province, in NE Brazil, with marked influence over drainage patterns. At the same time, erosive retreat of the eastern margin of the platform successively captured upland rivers, which became Atlantic tributaries evolving associated to main rift systems. The continued nature of these processes explains the mixed phylogenetic and distributional patterns between Atlantic tributaries and the upland crystalline shield areas, especially in the southeastern continental margin, represented by successively, less inclusive sister-groups associated with cladogenetic events from the Late Cretaceous to the present.As drenagens costeiras do...

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Section: Tectonic Evolution Of the Eastern Margin Of South Americamentioning

confidence: 99%

Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

2006

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“…A integração da faixa delimitada na margem continental brasileira e no oceano pelos lineamentos do Rio de Janeiro e Florianópolis (Alves 1981, Asmus & Guazelli 1981 e, no continente emerso, pelo Arco de Ponta Grossa, configuram-se como os responsáveis pelo melhor entendimento do papel dessas estruturas Ana Olivia Barufi Franco-Magalhães et al dicionar muito fortemente a evolução tectônica dessa faixa de estruturação desde o Devoniano, porém com maior acentuação no Carbonífero Superior (Zalán et al 1990), principalmente durante a Reativação Wealdeniana (Almeida 1969, 1983, Fulfaro et al 1982, Ferreira 1982, Zalán et al 1990. A região pesquisada apresenta-se domeada principalmente à partir do Triássico -Jurássico (Zalán et al 1987), embora também existam fortes evidências de reativação no Cretáceo Inferior, associado à abertura do Oceano Atlântico-Sul (Almeida et al 1996, Milani & Ramos 1998, Franco 2006; no Cretáceo Superior, durante o soerguimento da Serra do Mar (Vignol- Lelarge et al 1994), e no Paleógeno , Hackspacher et al 2004. Entretanto, os alinhamentos de direção ENE-WSW, constituídos por antigas falhas e zonas de cisalhamento no embasamento pré-cambriano, foram reativados como falhas normais no Paleógeno (Eoceno-Oligoceno) e deram origem à um corredor de vales tectônicos denominados de Sistema de Riftes Cenozóicos do Sudeste Brasileiro (Zalán & Oliveira 2005), representado na área de estudo pela bacia de Curitiba (Riccomini 1989).…”

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Exumação tectônica e reativação de paleolineamentos no Arco de Ponta Grossa: termocronologia por traços de fissão em apatitas

Franco-Magalhães

Hackspacher

Saad

2010

RBG

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“…In the non-marine basins, dates are available for Itaboraí and Volta Redonda (Almeida et al, 1996). Mizusaki et al (1998) presented 377 K/ Ar radiometric dates of basic and alkaline magmatic rocks related to the rifting between South America and Africa, of which the major incidences of alkaline magmatic activity (produced by the break-up between South America and Africa) are from around 50 My (early Eocene) and 10 My (Miocene).…”

Section: Radiometric and Palynological Datamentioning

confidence: 99%

A reassessment of bunodont metatherians from the Paleogene of Itaboraí (Brazil): systematics and age of the Itaboraian SALMA

Oliveira¹,

Goin²

2011

Rev. bras. paleontol.

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-Early Paleogene metatherians with inflated, low cusps (bunodont dentition), such as Bobbschaefferia, Procaroloameghinia, Protodidelphis, Guggenheimia, and Zeusdelphys have been subject to different interpretations regarding their affinities. A phylogenetic study including these bunodont marsupials and other selected metatherians presented here leads to the recognition of the following taxonomic assignments: "Ameridelphia", Protodidelphidae: Carolocoutoia ferigoloi, Guggenheimia brasiliensis, G. crocheti sp. nov., Protodidelphis vanzolinii, P. mastodontoides (= Robertbutleria mastodontoidea), Periprotodidelphis bergqvisti gen. et sp. nov., and Zeusdelphys complicatus; Marsupialia, Didelphimorphia, Peradectoidea, Caroloameghiniidae: Procaroloameghinia pricei; Australidelphia, Polydolopimorphia, family indet.: Bobbschaefferia fluminensis and aff. Bobbschaefferia sp.. The phylogenetic analysis does not support a closer relationship between protodidelphids and living didelphids as well as between Guggenheimia and Mirandatherium. No closer relationship was found between Zeusdelphys with Minusculodelphis and Monodelphopsis. Procaroloameghinia is regarded as a peradectoid didelphimorphian with bunoid dentition convergent with, but without direct affinities to, protodidelphids or polydolopimorphians. Bobbschaefferia is regarded as a basal polydolopimorphian, even though the scarce evidence at hand prevents us from assign it to any particular family of the suborder Hatcheriformes. Correlation with stratigraphic, sedimentary and magmatic data from some of the best studied margin basins in SE Brazil, together with the systematic reassessment of bunodont metatherians from Itaboraí, suggest that the Itaboraian SALMA is latest Paleoceneearly Eocene in age. Itaboraian protodidelphids, sternbergiids and caroloameghiniids are also recorded in the Las Flores locality/ Formation (central Patagonia) and in the La Barda locality (northwestern Patagonia) during the latest Paleocene and early Eocene.Key words: Metatheria, "Ameridelphia", Australidelphia, Didelphimorphia, Eocene, chronostratigraphy. RESUMO -Metatérios do Paleógeno inicial com cúspides infladas e baixas (bunodontes) comoBobbschaefferia, Procaroloameghinia, Protodidelphis, Guggenheimia e Zeusdelphys têm sido objeto de diferentes interpretações sobre suas afinidades. Um estudo filogenético, incluindo esses marsupiais bunodontes, assim como outros metatérios selecionados, conduz ao reconhecimento das seguintes atribuições taxonômicas: "Ameridelphia", Protodidelphidae: Carolocoutoia ferigoloi, Guggenheimia brasiliensis, G. crocheti sp. nov., Protodidelphis vanzolinii, P. mastodontoides (= Robertbutleria mastodontoidea), Periprotodidelphis bergqvisti gen. et sp. nov. e Zeusdelphys complicatus; Marsupialia, Didelphimorphia, Peradectoidea, Caroloameghiniidae: Procaroloameghinia pricei; Australidelphia, Polydolopimorphia, fam. indet.: Bobbschaefferia fluminensis and aff. Bobbschaefferia sp.. A análise filogenética não fornece suporte a uma íntima relação entre protodid...

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Correlação Do Magmatismo Das Bacias Da Margem Continental Brasileira Com O Das Áreas Emersas Adjacentes

Cited by 57 publications

References 18 publications

Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

Exumação tectônica e reativação de paleolineamentos no Arco de Ponta Grossa: termocronologia por traços de fissão em apatitas

A reassessment of bunodont metatherians from the Paleogene of Itaboraí (Brazil): systematics and age of the Itaboraian SALMA

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