História tectónica das placas do Oceano Índico 1

História tectónica das placas do Oceano Índico 1

Magloire FABIEN

53,23 €
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2024
Materia
Geología y la litosfera
ISBN:
9786207709472
53,23 €
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A divisão mesozóica do Gondwana Oriental (EG) foi controlada por correntes de convecção N-S (CC) compostas por três ramos. A fragmentação ocorreu em cinco períodos, sendo cada um deles precedido por encerramentos e saltos de cristas médio-oceânicas. O processo começou com a interação lateral da recém-formada CC E-W da África do Sul com o EG no Cretáceo Inferior. As actividades de rifteamento aptiano ocorreram entre Madagáscar/Índia e Antárctica Oriental/Austrália. Seguiram-se aberturas no fundo do mar com a criação da Baía de Bengala e da Bacia de Enderby Ocidental. Os saltos de cristas para norte no Cenomaniano levaram à abertura da Bacia de Enderby Oriental para leste e às actividades de rifting entre Madagáscar e a Índia e entre a Antárctida Oriental e a Austrália. As aberturas oceânicas subsequentes foram caracterizadas pela dispersão da Bacia de Enderby e por uma propagação da crista para trás. As colisões laterais com a CC de Enderby levaram ao fecho da crista na Bacia de Mascarene e à fusão das duas CC entre as Seychelles e a Índia. O CC ocidental separou-se dos centrais no final do Terciário. Os saltos de cristas para norte a partir de SWIR em C5 geraram o sistema de Rift Leste-Africano.

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Otros libros del autor

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