The long life of SAMBA connection in Columbia: A paleomagnetic study of the 1535 Ma Mucajaí Complex, northern Amazonian Craton, Brazil
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DOI: 10.1016/j.gr.2019.09.016
Abstract: Abstract In recent years, there has been a significant increase in the paleomagnetic data of the Amazonian Craton, with important geodynamic and paleogeographic implications for the Paleo-Mesoproterozoic Columbia supercontinent (a.k.a., Nuna, Hudsoland). Despite recent increase… read more here.
Keywords: columbia; amazonian craton; craton; long life ... See more keywords
Petrology, geochemistry and U-Pb zircon and baddeleyite ages of the alkaline rocks from the central-southern Guyana Shield, northern Amazonian Craton
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DOI: 10.1016/j.jsames.2018.08.001
Abstract: Abstract The Apiau Alkaline Complex (AAC) represents a rift-related intracontinental magmatism and occurs as intrusions within the Precambrian basement of the central-southern portion of the Guyana Shield, Amazonian Craton. The complex extends for over 200 km… read more here.
Keywords: petrology; amazonian craton; zircon baddeleyite; geochemistry ... See more keywords
Fissural mafic magmatism on southwestern Amazonian Craton: Petrogenesis and 40Ar-39Ar geochronology
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DOI: 10.1016/j.jsames.2019.04.004
Abstract: Abstract Expressive occurrences of sills and mafic dyke swarms as a result of tafrogenetic processes that led to break-up or attempted break-up of continental crust are found on the south and southwestern Amazonian Craton. This… read more here.
Keywords: salto ceu; geochronology; amazonian craton; southwestern amazonian ... See more keywords
Paleoproterozoic volcanic caldera in the Amazonian craton, northern Brazil: Stratigraphy, lithofacies characterization, and lithogeochemical constraints
Sign Up to like & getrecommendations! Published in 2019 at "Journal of South American Earth Sciences"
DOI: 10.1016/j.jsames.2019.102252
Abstract: Abstract In the Vila Tancredo Neves locality, Amazonian craton, northern Brazil, occur Paleoproterozoic well-preserved volcano–plutonic centers. The lower 1.88 Ga Sobreiro Formation has overlapped lavas comprising andesite at the base; andesi-basalt and latite at middle; and… read more here.
Keywords: paleoproterozoic volcanic; northern brazil; amazonian craton; craton northern ... See more keywords
From Mesoarchean drips to modern–style tectonics in the Carajás Province, Amazonian Craton
Sign Up to like & getrecommendations! Published in 2020 at "Journal of South American Earth Sciences"
DOI: 10.1016/j.jsames.2020.102817
Abstract: Abstract The beginning of modern–style plate tectonics on Earth is not a consensus, but many authors suggest that it happened transitionally, from 3.2 to 2.5 Ga. In the Amazonian Craton, Brazil, the contrasting crustal architecture of… read more here.
Keywords: amazonian craton; province; tectonics; modern style ... See more keywords
Evidence of a Palaeoproterozoic SLIP, northern Amazonian Craton, Brazil
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DOI: 10.1016/j.jsames.2021.103453
Abstract: Abstract The Orocaima SLIP consists of an association of acid-intermediate volcanic-plutonic rocks. The volcanic rocks were generated in explosive eruptions through low eruptive columns, probably associated with fissural volcanism in the north of the Amazonian… read more here.
Keywords: brazil; amazonian craton; craton brazil; evidence palaeoproterozoic ... See more keywords
Zircon U-Pb geochronology and Lu-Hf isotope systematics of the Araguaia Belt basement Rocks: Evidence of links with the southeastern Amazonian Craton, Brazil
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DOI: 10.1016/j.precamres.2020.106090
Abstract: Abstract Archean and Paleoproterozoic basement rocks are exposed in the Araguaia Belt, a Neoproterozoic orogen bordering the eastern portion of the Amazonian Craton. Zircon LA-MC-ICPMS U-Pb and Lu-Hf isotopic systematics allowed a more accurate dating… read more here.
Keywords: systematics; basement rocks; geochronology; amazonian craton ... See more keywords