skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices
Tipo de recurso Mostra resultados com: Mostra resultados com: Índice

Uranium-Pb ages of detrital zircon from the Mesoarchean Sukma and Neoarchean Bengpal supracrustal groups: Evidence forunconformable stratigraphic relations and implications forPrecambrian stratigraphy of the Bastar Craton, southcentral India

Nandi, Ankita ; Vijaya Kumar, T. ; Babu, E.V.S.S.K. ; Vadlamani, Ravikant

Journal of Asian earth sciences, 2023-08, Vol.251, Article 105671 [Periódico revisado por pares]

Elsevier Ltd

Texto completo disponível

Citações Citado por
  • Título:
    Uranium-Pb ages of detrital zircon from the Mesoarchean Sukma and Neoarchean Bengpal supracrustal groups: Evidence forunconformable stratigraphic relations and implications forPrecambrian stratigraphy of the Bastar Craton, southcentral India
  • Autor: Nandi, Ankita ; Vijaya Kumar, T. ; Babu, E.V.S.S.K. ; Vadlamani, Ravikant
  • Assuntos: Bastar craton ; Bengpal supracrustals ; Detrital zircon geochronology ; Mesoarchean ; Neoarchean ; Sukma supracrustals
  • É parte de: Journal of Asian earth sciences, 2023-08, Vol.251, Article 105671
  • Descrição: [Display omitted] •First report of Mesoarchean (<3.1 Ga) deposition in the Sukma Group, Bastar craton.•Terrestrial detritus of Sukma Group most likely from Western Dharwar and Singhbhum cratons.•Paleoarchean nucleus of Bastar, Western Dharwar and Singhbhum cratons were proximal by ∼ 3 Ga.•Neoarchean (<2.4 Ga) Bengpal Group was therefore deposited after a significant hiatus. Records of terrestrial detritus deposited since the Mesoarchean, preserved in sedimentary basins on cratons, are useful in continental reconstruction. The southern segment of the Bastar craton comprises Paleoarchean cratonic fragments extensively reworked, and intruded by granite batholiths, during the Neoarchean and expose two major groups of supracrustal successions. The Sukma Group, occurring as amphibolite-facies remnants within Neoarchean granitoids are mostly chemogenic supracrustal rocks in contrast to the low-to unmetamorphosed Neoarchean volcano-sedimentary Bengpal Group. In order to resolve their uncertain stratigraphic relationship, detrital zircon U-Pb analyses were carried out to obtain detrital age spectra. The youngest concordant detrital zircon 207Pb/206Pb ages from the Sukma Group metapelite (CB11C) and micaceous quartzite (CH5B) samples places its maximum depositional age at < 3.10 Ga (3128 ± 6 Ma, cumulative maximum depositional age of both samples). In contrast, the micaceous quartzite (samples CB14 and CB18) from the Bengpal Group were deposited after 2.4 Ga (2350 ± 16 Ma, cumulative maximum depositional age of both samples), indicating a considerable hiatus in depositional history of these two supracrustal successions. Comparison with globally compiled age spectra from cratonic Archean-aged metasedimentary successions indicate that a most likely clastic sediment provenance to the dominantly chemogenic Sukma Group was from the Western Dharwar and Singhbhum cratons. The inferred provenance cratons are based on the presence of extensive Mesoarchean granitoid batholiths and, therefore, indicates their proximity at least till 3.0 Ga. In contrast, clastic detritus to the possibly riftogenic volcano-sedimentary Bengpal Group was largely sourced from the voluminous Neoarchean magmatism probably from within the Bastar craton.
  • Editor: Elsevier Ltd
  • Idioma: Inglês
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.