The Precambrian drift history and paleogeography of Congo−São Francisco craton

Trindade, Ricardo Iván Ferreira da; D’Agrella-Filho, Manoel S.; Antonio, Paul; Teixeira, Wilson

doi:10.1016/b978-0-12-818533-9.00016-3

Cited by 7 publications

(8 citation statements)

References 134 publications

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“…Recent compilations of the Precambrian paleomagnetic data for Amazonian, São Francisco and Río de la Plata Cratons were presented by D'Agrella-Filho et al ( 2021); Trindade et al (2021) and Rapalini et al (2021), respectively. This database is updated in Table 1, summarizing the paleomagnetic poles between 2.8 and 0.5 Ga for these three cratons published between 2021 and 2023.…”

Section: Paleomagnetic Databasementioning

confidence: 99%

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Paleomagnetism of the Main South American Precambrian Cratons

2022

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Here, we discuss the role of the main South American cratonic units in the Columbia and Rodinia supercontinents, and Gondwana megacontinent. According to paleomagnetic and geological data Amazonia and West Africa were linked to Baltica, Laurentia and Siberia forming West Columbia at ca. 1.78-1.75 Ga. The 1.78 to 1.42 Ga paleomagnetic data for Amazonia, Baltica and Laurentia suggest either, that West Columbia preserved its integrity, at least, up to 1.42 Ga, or Amazonia/West Africa broke-up from West Columbia at some time between 1.53 and 1.42 Ga.. On the other hand, the Congo/São Francisco, North China, Rio de la Plata, India and proto-Australia formed the East Columbia at ca. 1.78 Ga. However, the presently available Paleo to Mesoproterozoic paleomagnetic data for these cratonic blocks suggest that East Columbia was short-lived. At 1.1 Ga ago, Amazonia/West Africa, Congo-São Francisco, Kalahari and India probably formed a megacontinent that later collided with Laurentia and Baltica forming Rodinia at ca. 1.0 Ga. Most probably, Rodinia broke-up at ca. 750 Ma, when Congo/São Francisco, Kalahari and other smaller blocks rotated ca. 90° counterclockwise, closing the Brasiliano/Clymene ocean and docked against Amazonia/West Africa and Rio de la Plata at ca. 600-570 Ma ago forming West Gondwana.

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Section: Paleomagnetic Databasementioning

confidence: 99%

“…Testing the longevity of Columbia is hampered by the scarcity and low quality of paleomagnetic poles available for the several cratonic blocks that composed it. Trindade et al (2021) tried to compare apparent polar wander paths for North China, Congo-São…”

Section: Columbia Longevitymentioning

confidence: 99%

Paleomagnetism of the Main South American Precambrian Cratons

2022

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“…However, only two main Archean‐Paleoproterozoic portions of the basement are exposed in the southern and northeastern cratonic margin (e.g., Teixeira et al., 2017). The final amalgamation of the Congo‐São Francisco Craton (Trindade et al., 2021) is mainly recorded in two Paleoproterozoic mobile belts: (a) the Itabuna‐Salvador‐Curaçá belt in the northeastern SFC, whose rocks reached high‐degree metamorphism (Barbosa et al., 2008), and (b) the Mineiro belt in the southern SFC, which consists of granitoids and a volcano‐sedimentary succession metamorphosed at greenschist to amphibolite facies (Alkmim & Marshak, 1998). Following the amalgamation, several mafic dyke swarms of similar compositions and ages were emplaced on the coastline of the northeastern SFC during the early Neoproterozoic, in response to the post‐assembly extension (Chaves et al., 2019).…”

Section: Geological Settingmentioning

confidence: 99%

“…It is generally believed that supercontinents, Nuna and Rodinia, were formed during Paleo‐Neoproterozoic times, followed by the southern supercontinent Gondwana in the Neoproterozoic–Early Paleozoic, northern supercontinent Laurasia in Late Paleozoic, and the most recent supercontinent, Pangea at ∼250 Ma. Over the past three decades, numerous efforts have been dedicated to the reconstruction of supercontinent's paleogeography in order to build a solid basis for supercontinent geodynamics (e.g., Evans et al., 2016; Nance & Murphy, 2013; Trindade et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

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Paleomagnetic Constraints From 925 Ma Mafic Dykes in North China and Brazil: Implications for the Paleogeography of Rodinia

Zhao

Peng

et al. 2022

JGR Solid Earth

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Coeval Neoproterozoic mafic dykes with a well‐constrained isotopic age of 925 Ma are distributed in the North China Craton (NCC) of China and São Francisco Craton (SFC) of Brazil. Several recent studies favor the hypothesis that these two cratons were connected during 925 Ma and constituted building cratons for the supercontinent Rodinia. However, the paleo‐positions of the two cratons in Rodinia have not yet been paleomagnetically resolved. This paper presents the paleomagnetic results of these dykes in both NCC and SFC. Detailed thermal and alternating‐field demagnetization revealed that these dykes record stable components of magnetization with unblocking temperatures below the Curie temperature of magnetite. Rock magnetic results and scanning electron microscope analysis further confirm that the major magnetic minerals in dyke samples are pseudo‐single domain titanomagnetites. The mean directions of the characteristic remanent magnetization (ChRM) of the dykes are distinct from those of rocks of different ages in the sampling localities, and are supported by positive baked contact tests, indicating primary remanent magnetization. The ChRM of the SFC dykes also exhibits dual polarity. Our results suggest that the NCC and SFC were in the moderate to high paleolatitudes of the Southern Hemisphere during approximately 925 Ma, suggesting a possible paleogeographic connection between the two cratons. A new paleogeographic reconstruction of both cratons during 925 Ma is proposed, which is supported by other geological evidence.

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