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Paleo-Mesoproterozo...
Paleo-Mesoproterozoic Nuna supercycle
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- Elming, Sten-Åke (författare)
- Luleå tekniska universitet,Geovetenskap och miljöteknik
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- Salminen, Johanna (författare)
- Department of Geosciences and geography, University of Helsinki, Helsinki, Finland
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- Pesonen, Lauri J. (författare)
- Department of Physics, University of Helsinki, Helsinki, Finland
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(creator_code:org_t)
- Elsevier, 2021
- 2021
- Engelska.
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Ingår i: Ancient Supercontinents and the Paleogeography of Earth. - : Elsevier. ; , s. 499-548
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We review models of the Precambrian supercontinent Nuna (c.1.80–1.20 Ga) and present a new model of the Nuna life-cycle. We explore the option where Amazonia−West Africa and Congo−São Francisco cratons were not a part of Nuna but form a cluster of cratons named Atlantica. Nuna was finally assembled at c.1.65 Ga, encompassing Laurentia, Baltica, Siberia, proto-Australia, North China, and India. The break up of Nuna is here suggested to have started at c.1.3 Ga with Australian cratons moving away from Laurentia. Varying drift rates and length between coeval poles from separate cratons support the operation of modern style plate tectonics during the Nuna supercycle. Moreover, if there was no link between Nuna and the Atlantica cratons, the size of Nuna might not meet the criteria for a supercontinent, but should be regarded as a huge landmass.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Nyckelord
- Nuna
- supercycle
- paleomagnetism
- plate tectonic
- Prospekteringsgeofysik
- Exploration Geophysics
Publikations- och innehållstyp
- ref (ämneskategori)
- kap (ämneskategori)
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