The Kalahari Craton during the assembly and dispersal of Rodinia

Jacobs, Joachim; Pisarevsky, Sergei; Thomas, Robert J.; Becker, Thomas E.

doi:10.1016/j.precamres.2007.04.022

Cited by 264 publications

(144 citation statements)

References 109 publications

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“…11a) would seem logical. Both are regions with ~1 Ga crust, with similar isotopic compositions (Jacobs et al, 2008;Storey et al, 1994), and our new compilation confirms that both the Haag and Maud belt are associated with relatively high amplitude aeromagnetic anomalies (Fig. 4a).…”

Section: Far Travelled Haag-ellsworth Whitmore Paradigmsupporting

confidence: 79%

New geophysical compilations link crustal block motion to Jurassic extension and strike-slip faulting in the Weddell Sea Rift System of West Antarctica

2017

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Section: Far Travelled Haag-ellsworth Whitmore Paradigmsupporting

confidence: 79%

New geophysical compilations link crustal block motion to Jurassic extension and strike-slip faulting in the Weddell Sea Rift System of West Antarctica

2017

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“…Protolith ages for the Pan-African granulites of eastern Dronning Maud Land are poorly constrained, but meta-tonalite in the SW Sør Rondane Mountains preserves pre-metamorphic intrusive ages of 998-995 and 945-920 Ma (Kamei et al 2013). This confirms earlier suggestions of a change in protolith age between central Dronning Maud Land and the Sør Rondane Mountains (Jacobs et al 2008), and allows the possibility that the Sør Rondane tonalite is part of the Rayner Complex metamorphosed at c. 0.6-0.5 Ga. This would place the Rayner-Maud boundary between central Dronning Maud Land and the Sør Rondane Mountains, which would therefore also be a likely site for any Pan-African oceanic suture.…”

Section: Antarctica Dividedsupporting

confidence: 74%

Antarctica and supercontinent evolution: historical perspectives, recent advances and unresolved issues

Harley

Fitzsimons

Zhao

2013

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The Antarctic rock record spans some 3.5 billion years of history, and has made important contributions to our understanding of how Earth's continents assemble and disperse through time. Correlations between Antarctica and other southern continents were critical to the concept of Gondwana, the Palaeozoic supercontinent used to support early arguments for continental drift, while evidence for Proterozoic connections between Antarctica and North America led to the 'SWEAT' configuration (linking SW USA to East Antarctica) for an early Neoproterozoic supercontinent known as Rodinia. Antarctica also contains relicts of an older Palaeo-to Mesoproterozoic supercontinent known as Nuna, along with several Archaean fragments that belonged to one or more 'supercratons' in Neoarchaean times. It thus seems likely that Antarctica contains remnants of most, if not all, of Earth's supercontinents, and Antarctic research continues to provide insights into their palaeogeography and geological evolution. One area of research is the latest Neoproterozoic-Mesozoic active margin of Gondwana, preserved in Antarctica as the Ross Orogen and a number of outboard terranes that now form West Antarctica. Major episodes of magmatism, deformation and metamorphism along this palaeo-Pacific margin at 590 -500 and 300-230 Ma can be linked to reduced convergence along the internal collisional orogens that formed Gondwana and Pangaea, respectively; indicating that accretionary systems are sensitive to changes in the global plate tectonic budget. Other research has focused on Grenville-age (c. 1.0 Ga) and PanAfrican (c. 0.5 Ga) metamorphism in the East Antarctic Craton. These global-scale events record the amalgamation of Rodinia and Gondwana, respectively. Three coastal segments of Grenville-age metamorphism in the Indian Ocean sector of Antarctica are each linked to the c. 1.0 Ga collision between older cratons but are separated by two regions of pervasive Pan-African metamorphism ascribed to Neoproterozoic ocean closure. The tectonic setting of these events is poorly constrained given the sparse exposure, deep erosion level and likelihood that younger metamorphic events have reactivated older structures. The projection of these orogens under the ice is also controversial, but it is likely that at least one of the Pan-African orogens links up with the Shackleton Range on the palaeo-Pacific margin of the craton. Sedimentary detritus and glacial erratics at the edge of the ice sheet provide evidence for the c.

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“…The assembly of Rodinia (ca. 1250-1140 Ma) was primarily accomplished through dual opposing subduction zones beneath the Kalahari-Amazonia on one side (Ibanez-Mejia et al, 2011, and references therein; Jacobs et al, 2008) and Laurentia-Baltica on the other Rivers and Corrigan, 2000, and references therein; Bingen et al, 2008) (Fig. 4).…”

Section: Rodinia and Gondwana Continental Marginsmentioning

confidence: 99%

Not all supercontinents are created equal: Gondwana-Rodinia case study

Spencer

Hawkesworth

Cawood

et al. 2013

Geology

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The Kalahari Craton during the assembly and dispersal of Rodinia

Abstract: In this paper we review the dimensions, geometry and architecture of the components of the

Cited by 264 publications

References 109 publications

New geophysical compilations link crustal block motion to Jurassic extension and strike-slip faulting in the Weddell Sea Rift System of West Antarctica

New geophysical compilations link crustal block motion to Jurassic extension and strike-slip faulting in the Weddell Sea Rift System of West Antarctica

Antarctica and supercontinent evolution: historical perspectives, recent advances and unresolved issues

Not all supercontinents are created equal: Gondwana-Rodinia case study

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