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New insights into the Triassic sedimentary environment of the eastern parts of the Song Da and Sam Nua basins alongside the Indosinian Song Ma suture, Northern Vietnam

Publié dansJournal of Asian Earth Sciences, vol. 187, no. 104067
Date de publication2020
Résumé

This study documents the sedimentology, structures, and foraminifer content of Triassic formations from the eastern part of the Truong Son Belt (Northern Vietnam). Sedimentary rocks in the eastern Song Da and Sam Nua basins occur on both sides of the Middle Triassic Song Ma suture zone that separates the Indochina Block from the South China Block. The main outcomes of our study include detailed stratigraphic successions that we have established for the two basins. New foraminifer determinations indicate a Middle to Late Triassic age for the carbonate deposition. The depositional settings of the carbonate deposits and their deformation patterns support a southward “subduction” beneath the Indochina Block, ending with the collision with the South China Block during the Middle Triassic. Moreover, our new biostratigraphic dating of the stratigraphic successions can be used to compare the Triassic carbonate platforms from Northern Vietnam with other platforms elsewhere, including those that have already been well documented in Indonesia.

Mots-clés
  • Stratigraphy
  • Foraminifers
  • Sedimentology
  • Carbonate platforms
  • Indosinian orogeny
  • Northern Vietnam
Citation (format ISO)
VILLENEUVE, Michel et al. New insights into the Triassic sedimentary environment of the eastern parts of the Song Da and Sam Nua basins alongside the Indosinian Song Ma suture, Northern Vietnam. In: Journal of Asian Earth Sciences, 2020, vol. 187, n° 104067. doi: 10.1016/j.jseaes.2019.104067
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Article (Published version)
accessLevelRestricted
Identifiants
ISSN du journal1367-9120
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Informations techniques

Création27/10/2019 04:57:00
Première validation27/10/2019 04:57:00
Heure de mise à jour15/03/2023 18:15:25
Changement de statut15/03/2023 18:15:24
Dernière indexation17/01/2024 06:38:55
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