The supercontinent cycle: A retrospective essay

Nance, R. Damian; Murphy, J. Brendan; Santosh, M.

doi:10.1016/j.gr.2012.12.026

Cited by 599 publications

(195 citation statements)

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“…23) Vail et al (1977); períodos de estufa/geladeira e porcentagem da plataforma submersa segundo Fischer (1981); intrusão de granitos, segundo Engel & Engel (1964). Fonte: modificado de Nance et al (2014).…”

Section: Modos Geladeira-estufaunclassified

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Ciclos climáticos e causas naturais das mudanças do clima

et al. 2018

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TerraeDid atic a IntroduçãoA presente histeria sobre aquecimento global -com a previsão apocalíptica de fusão das calotas de gelo polar, inundação de cidades costeiras e desertificação de zonas produtoras de alimentos -não ajuda os cidadãos a compreender as forças reais e complexas que moldam o clima da Terra (Hecht 1993(Hecht -1994.Tentar entender o clima tem sido prática de sobrevivência desde os primórdios da humanidade. Inegavelmente, compreender o momento ideal do plantio e da colheita fez parte das técnicas da agricultura primitiva que permitiram ao homem a transição do nomadismo para o sedentarismo. Assim, a partir da constatação da óbvia alternância entre o dia e a noite, da observação das fases da Lua, da dedução das estações do ano, foi-se descobrindo a estreita relação entre esses fenômenos (cíclicos e de origem astronômica) com as alterações do clima na Terra (também de caráter periódico). ABSTRACT:The periodic nature of climate changes on the Earth can be explained in terms of a limited number of terrestrial and astronomical factors. In annual/daily scales, the climate varies according to the Earth's revolution and rotation. Medium term climate cycles (decades/centuries/millennia) are related to changes in solar radiation caused by the influences of major planets of the Solar System. Oceanic oscillations (decadal order) are possibly caused by the planetary and lunar influences. Long term climate cycles (tens and hundreds of thousand years) are caused by variations in the parameters of Earth's orbit (eccentricity, obliquity and precession). Impact events of large bodies on the planet and mass extinction arise from supercycles (tens of millions of years) caused by the vertical oscillation of the solar system relative to the galactic plane. Tectonics, volcanism and the evolution of supercontinents exhibit supercycles (hundreds of million years) induced by the Solar System movement around the Milky Way center and by the cosmic rays variation. Astronomical factors permeate virtually all the climate cycles orders, acting directly or indirectly in many bio-geo-oceanic-atmospheric processes. It is concluded that the Earth's climate is characterized by cycles astronomically controlled by the Moon, the Sun, the planets, the Solar System and even the Galaxy. Ciclos climáticos e causas naturais das mudanças do clima

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Section: Modos Geladeira-estufaunclassified

“…Fonte: modificado a partir de Shaviv & Veizer (2003) aumenta. Porém, conforme os oceanos ficam mais velhos e mais frios, eles tornam-se mais profundos, fazendo com que o nível do mar diminua até os oceanos começarem a fechar (Nance et al 2014). …”

Section: Movimentação Tectônicaunclassified

Ciclos climáticos e causas naturais das mudanças do clima

et al. 2018

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“…The mechanisms responsible for plate tectonic change on Earth have been linked to the different stages of the supercontinent cycle (Worsley et al 1982;Gurnis 1988;Storey 1995;Tackley 2000;Silver & Behn 2008;Li & Zhong 2009;Yoshida & Santosh 2011;Buiter & Torsvik 2014;Nance et al 2014). Nance et al (2014) provide a recent review of the hypothesis that bottom-up or mantlebased mechanisms are principally responsible for the breakup of supercontinents, whereas top-down or subduction-based mechanisms are inferred to have governed the dispersal and (re-)amalgamation of supercontinents (Fig.…”

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confidence: 99%

“…Nance et al (2014) provide a recent review of the hypothesis that bottom-up or mantlebased mechanisms are principally responsible for the breakup of supercontinents, whereas top-down or subduction-based mechanisms are inferred to have governed the dispersal and (re-)amalgamation of supercontinents (Fig. 1).…”

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confidence: 99%

How subduction broke up Pangaea with implications for the supercontinent cycle

Keppie

2015

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Mechanisms that can explain the Mesozoic motion of Pangaea in a palaeomagnetic mantle reference frame may also be able to explain its breakup. Calculations indicate that Pangaea moved along a non-rigid path in the mantle frame between the late Triassic and early Jurassic. The breakup of Pangaea may have happened as a response to this non-rigid motion. Tectonic forces applied to the margins of Pangaea as a consequence of subduction at its peripheries can explain both the motion and deformation of Pangaea with a single mechanism. In contrast, mantle forces applied to the base of Pangaea appear to be inconsistent with the kinematic constraints and do not explain the change in supercontinent motion that accompanied the breakup event. Top-down plate tectonics are inferred to have caused the breakup of Pangaea. Strong coupling between the mantle and lithosphere may not have been the case during the Phanerozoic eon when the Pangaean supercontinent formed and subsequently dispersed.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.The mechanisms responsible for plate tectonic change on Earth have been linked to the different stages of the supercontinent cycle (Worsley et al.

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“…The formation, evolution and disruption of supercontinents has been the focus of several investigations in the recent years (e.g., Rogers and Santosh 2003;Nance et al 2013). In particular, the assembly and breakup of supercontinents control Earth's geological evolution, including first order tectonic processes such as mountain building (Collins 2003;Dickinson 2004), seafloor spreading (Zhang et al 2009;Murphy et al 2009;Eriksson et al 2009;Santosh et al 2009), and mantle structure and dynamics (e.g.…”

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confidence: 99%