Continental Reworking during Overprinting Orogenic Events, Southern Prince Charles Mountains, East Antarctica

Phillips, Grace S.; Kelsey, David E.; Corvino, Adrian F.; Dutch, Rian

doi:10.1093/petrology/egp065

Cited by 42 publications

(17 citation statements)

References 69 publications

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“…The Eastern GhatsRayner Belt represents one such high-grade mobile belt (ca. 1000-900 Ma) that sutured cratonic blocks of India and East Antarctica (Kelly et al, 2002;Harley, 2003;Phillips et al, 2009). Recent discovery of Grenvillian-age metamorphism from Amery Ice Shelf and the Prydz Bay area (Wang et al, 2008;Liu et al, 2009) warrants its inclusion in this composite mobile belt.…”

Section: Discussionmentioning

confidence: 99%

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Evolution of granulite enclaves and associated gneisses from Purulia, Chhotanagpur Granite Gneiss Complex, India: Evidence for 990–940Ma tectonothermal event(s) at the eastern India cratonic fringe zone

Karmakar

Bose

Sarbadhikari³

et al. 2011

Journal of Asian Earth Sciences

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Section: Discussionmentioning

confidence: 99%

“…Thus, a separate orogeny of broadly ca. 1000-900 Ma age has been proposed recently (Fitzsimons, 2000(Fitzsimons, , 2003Phillips et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Evolution of granulite enclaves and associated gneisses from Purulia, Chhotanagpur Granite Gneiss Complex, India: Evidence for 990–940Ma tectonothermal event(s) at the eastern India cratonic fringe zone

Karmakar

Bose

Sarbadhikari³

et al. 2011

Journal of Asian Earth Sciences

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“…Rare ultra high-temperature metasedimentary rocks are also present in the Prydz Bay region, which indicate that some rocks were buried to depths in excess of 30 km (10-12 kbar and $950°C, Kelsey et al, 2003). Although metamorphic data indicate that the Pinjarra Orogen underwent rapid uplift and exhumation from about 550 Ma, controversy remains over whether the region represents a major continent-continent collision zone (e.g., Fitzsimons, 1996;Boger et al, 2001;Collins and Pisarevsky, 2005) or a major intracontinental deformation zone (e.g., Phillips et al, 2006Phillips et al, , 2009Kelsey et al, 2008). The presence of eclogite-facies metamorphism, rapidly exhumed from $40 km in the 300-kmwide and 1000-km-long Petermann Orogen, central Australia (Camacho and McDougall, 1997), which is universally accepted to have formed in an intracontinental setting (Scrimgeour and Close, 1999), highlights that high metamorphic grades do not always equate to convergent-margin settings (Raimondo et al, 2009).…”

Section: Other Major Orogens Of Gondwanamentioning

confidence: 99%

The mountains that triggered the Late Neoproterozoic increase in oxygen: The Second Great Oxidation Event

Campbell

Squire

2010

Geochimica et Cosmochimica Acta

131

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The consensus view is that the O 2 concentration of the Archean atmosphere was very low and that it rose to its present level of 21% in a series of steps, two of which dwarf the others in importance. The first, known as the Great Oxidation Event, occurred at $2.4 Ga. It involved an increase in the relative abundance of O 2 , which has been estimated at three orders of magnitude, and it is important because it led to the first surface weathering. The second, although less important in relative terms, involved the addition of 9 Â 10 17 kg of O 2 to the atmosphere, at least ten times as much as that required to produce the Great Oxidation Event. Its importance lies in the fact that it correlates with the rise of animals in the Ediacaran and Early Cambrian periods. Although it is widely accepted that an increase in atmospheric O 2 facilitated the appearance of animals at $575 Ma, followed by the Cambrian Explosion $50 Myr later, the cause of this increase remains controversial. We show that the surge in the O 2 level near the Precambrian-Cambrian boundary correlates with major episodes of continent-continent collision associated with Gondwana's amalgamation, including convergence between East and West Gondwana, which produced the 8000-km-long Transgondwanan Supermountains. The eroded roots of these mountains include the oldest lawsonite-bearing blueschists and eclogites, and ultra high-pressure metamorphic rocks. The sudden appearance of these lowthermal gradient, high-pressure metamorphic rocks implies that the Gondwanan orogenic zones were cooler and stronger than those associated with the assembly of earlier supercontinents and therefore capable of supporting higher mountains.There is a log-linear relationship between relief and erosion rate, and a linear relationship between sedimentation rate and organic C burial. Taken together these two relationships imply a log-linear relationship between relief and C sequestration. We suggest that the Gondwanan supermountains were higher than those produced during the assembly of earlier supercontinents and that rapid erosion of these mountains released a large flux of essential nutrients, including Fe and P, into the rivers and oceans, which triggered an explosion of algae and cyanobacteria. This, in turn, produced a marked increase in the production rate of photosynthetic O 2 . Rapid sedimentation during this period promoted high rates of burial of biogenic pyrite and organic matter generated during photosynthesis so that they could not back react with O 2 , leading to a sustained increase in atmospheric O 2 .

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“…In this case, the PanAfrican high-grade transpression tectonic event in Prydz Bay actually reflects a significant intracontinental reworking (Phillips et al, , 2009Wilson et al, 2007;Yoshida, 2007), likely in response to an important intraplate orogen (Boger et al, 2002). This implies that the Prydz Belt actually may represent a Pan-African intraplate tectonic mobile belt.…”

Section: Discussionmentioning

confidence: 91%

Metamorphic P–T paths of metapelitic granulites from the Larsemann Hills, East Antarctica

Tong

Liu

Wang

et al. 2014

Lithos

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Continental Reworking during Overprinting Orogenic Events, Southern Prince Charles Mountains, East Antarctica

Cited by 42 publications

References 69 publications

Evolution of granulite enclaves and associated gneisses from Purulia, Chhotanagpur Granite Gneiss Complex, India: Evidence for 990–940Ma tectonothermal event(s) at the eastern India cratonic fringe zone

Evolution of granulite enclaves and associated gneisses from Purulia, Chhotanagpur Granite Gneiss Complex, India: Evidence for 990–940Ma tectonothermal event(s) at the eastern India cratonic fringe zone

The mountains that triggered the Late Neoproterozoic increase in oxygen: The Second Great Oxidation Event

Metamorphic P–T paths of metapelitic granulites from the Larsemann Hills, East Antarctica

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