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

Autor(es)

Villeneuve, Michel ^[1] ; Rossignol, Camille ^[2] ; Martini, Rossana ^[3] ; Cornee, Jean-Jacques ^[4] ; Bourquin, Sylvie ^[5]

Afiliação do(s) autor(es)

^[1] Aix Marseille Univ, OSU Pytheas, CNRS, Marseille - France

^[2] Univ Sao Paulo, Dept Geofis, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao, 1226 Cidade Univ, BR-05508090 Sao Paulo, SP - Brazil

^[3] Univ Geneva, Dept Earth Sci, 13 Rue Maraichers, CH-1205 Geneva - Switzerland

^[4] Univ Antilles, Univ Montpellier, CNRS, Geosci Montpellier, Pointe A Pitre, Fwi - France

^[5] Univ Rennes, CNRS, Geosci Rennes, UMR 6118, F-35000 Rennes - France

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ASIAN EARTH SCIENCES; v. 187, JAN 2020.
• Citações Web of Science: 0

Resumo

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. (AU)

• Processo FAPESP: 18/02645-2 - Cronestratigrafia e rastreamento isotópico do Supergrupo Minas, Paleoproterozóico
• Beneficiário: Camille Yann Rossignol
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/16235-2 - Evolução da vida e oxigenação da Terra primitiva: uma perspectiva a partir da América do Sul
• Beneficiário: Pascal Andre Marie Philippot
• Modalidade de apoio: Auxílio à Pesquisa - Programa SPEC