Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and &gt;3600Ma Isukasia terrane continental crust (Greenland)

Nutman, Allen P.; Bennett, Vickie C.; Friend, C. R. L.; Yi, Keewook; Lee, Seung Ryeol

doi:10.1016/j.precamres.2014.12.013

Cited by 44 publications

(39 citation statements)

References 50 publications

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“…Southwards into the ISB, the dikes are more deformed and recrystallized into lineated hornblende amphibolites from their margins (Nutman, 1986). The youngest igneous age of metamorphosed Ameralik dikes has been suggested to be 2800 -2750Ma (Nutman et al, 2015). The studies of Ameralik dikes, therefore, demonstrate that the Isukasia terrane experienced a metamorphic event at least once after 2800Ma, with a southward increasing metamorphic grade (Nutman et al, 2015).…”

Section: Accepted Manuscriptmentioning

confidence: 91%

“…The youngest igneous age of metamorphosed Ameralik dikes has been suggested to be 2800 -2750Ma (Nutman et al, 2015). The studies of Ameralik dikes, therefore, demonstrate that the Isukasia terrane experienced a metamorphic event at least once after 2800Ma, with a southward increasing metamorphic grade (Nutman et al, 2015). The Neoarchean metamorphism may be related to the collision of >3600Ma…”

Section: Accepted Manuscriptmentioning

confidence: 94%

“…The reverse compositional variation within a grain might be a record of retrogressive metamorphism. However, origin of the retrogressive metamorphism is still controversial, whether subduction-related or the Neoarchean metamorphic overprint (Nutman et al, 2015;Rollinson, 2003).…”

Section: Al-poor Metabasitementioning

confidence: 99%

“…The ca. 2800 -3500Ma noritic and doleritic dikes (Ameralik dikes) intruding into the Isukasia terrane are important to understand the precise age and metamorphic grade of the metamorphism in late Archean(Nutman et al, 2015; Nutman al., 2004). Throughout much of the central gneisses located in the north of the ISB,…”

mentioning

confidence: 99%

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Intermediate P/T-type regional metamorphism of the Isua Supracrustal Belt, southern west Greenland: The oldest Pacific-type orogenic belt?

et al. 2015

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Section: Accepted Manuscriptmentioning

confidence: 91%

Section: Accepted Manuscriptmentioning

confidence: 94%

Section: Al-poor Metabasitementioning

confidence: 99%

mentioning

confidence: 99%

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Intermediate P/T-type regional metamorphism of the Isua Supracrustal Belt, southern west Greenland: The oldest Pacific-type orogenic belt?

et al. 2015

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“…K = outcrops of Kangerluarsuk supracrustal rocks. Geology based on geological maps published by Geological Survey of Greenland with revision of the Nuuk terrane assemblage according to Nutman et al (2015) of Mesoarchaean dioritic and tonalitic orthogneisses and supracrustal successions, with later minor magmatism (e.g., Garde 1997;Steenfelt et al 2005). To date, however, there have been few Hf isotope studies from across the NAC, and these are especially lacking with respect to providing a better understanding of the genesis and evolution of the volumetrically significant Meso-to-Neoarchaean crustal growth and reworking which served to stabilize the craton.…”

Section: Introductionmentioning

confidence: 99%

Building Mesoarchaean crust upon Eoarchaean roots: the Akia Terrane, West Greenland

Gardiner

Kirkland

Hollis

et al. 2019

Contrib Mineral Petrol

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Constraining the source, genesis, and evolution of Archaean felsic crust is key to understanding the growth and stabilization of cratons. The Akia Terrane, part of the North Atlantic Craton, West Greenland, is comprised of Meso-to-Neoarchaean orthogneiss, with associated supracrustal rocks. We report zircon U-Pb and Lu-Hf isotope data, and whole-rock geochemistry, from samples of gneiss and supracrustals from the northern Akia Terrane, including from the Finnefjeld Orthogneiss Complex, which has recently been interpreted as an impact structure. Isotope data record two major episodes of continental crust production at ca. 3.2 and 3.0 Ga. Minor ca. 2.7 and 2.5 Ga magmatic events have more evolved εHf, interpreted as reworking of existing crust perhaps linked to terrane assembly. Felsic rocks from the Finnefjeld Orthogneiss Complex were derived from the same source at the same time as the surrounding tonalites, but from shallower melting, requiring any bolide-driven melting event to have occurred almost simultaneously alongside the production of the surrounding crust. A simpler alternative has the Finnefjeld Complex and surrounding tonalite representing the coeval genesis of evolved crust over a substantial lithospheric depth. Hafnium isotope data from the two major Mesoarchaean crust-forming episodes record a contribution from older mafic Eoarchaean crust. Invoking the involvement of an Eoarchaean root in the growth of younger Mesoarchaean crust puts important constraints on geodynamic models of the formation of the discrete terranes that ultimately assembled to form Earth's cratons.

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Earth’s earliest phaneritic ultramafic rocks 1: plate tectonic mantle slices or crustal cumulates?

Zuo

Webb

Chin

et al. 2022

Preprint

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Mesoarchaean collision of Kapisilik terrane 3070Ma juvenile arc rocks and >3600Ma Isukasia terrane continental crust (Greenland)

Cited by 44 publications

References 50 publications

Intermediate P/T-type regional metamorphism of the Isua Supracrustal Belt, southern west Greenland: The oldest Pacific-type orogenic belt?

Intermediate P/T-type regional metamorphism of the Isua Supracrustal Belt, southern west Greenland: The oldest Pacific-type orogenic belt?

Building Mesoarchaean crust upon Eoarchaean roots: the Akia Terrane, West Greenland

Earth’s earliest phaneritic ultramafic rocks 1: plate tectonic mantle slices or crustal cumulates?

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