TZEVAHIRTZIAN, Athina; ZARAGOSI, Sebastien; BACHELERY, Patrick; BISCARA, L.; MARCHÈS, E.

doi:10.1016/j.margeo.2020.106383

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TZEVAHIRTZIAN, Athina
Environnements et Paléoenvironnements OCéaniques [EPOC]

ZARAGOSI, Sebastien

Environnements et Paléoenvironnements OCéaniques [EPOC]

BACHELERY, Patrick

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Article de revue

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Marine Geology. 2021-02, vol. 432, p. 106383

Resumen en inglés

A detailed morpho-bathymetric study of the Comoros archipelago, based on mostly unpublished bathymetric data, provides a first glimpse into the submarine section of these islands. It offers a complete view of the distribution of volcanic structures around the archipelago, allowing to discuss the origin and evolution of this volcanism. Numerous volcanic cones and erosional-depositional features have been recognized throughout the archipelago. The magmatic supply is focused below one or several volcanoes for each island, but is also controlled by lithospheric fractures evidenced by volcanic ridges, oriented along the supposed Lwandle-Somali plate boundary. Massive mass-wasting morphologies also mark the submarine flanks of each island. Finally, the submarine geomorphological analysis made possible to propose a new scheme for the succession of the island's growth, diverging from the east-west evolution previously described in the literature.< Leer menos

Palabras clave en inglés

Comoros archipelago

Morpho-bathymetry

Submarine volcanism

Volcanic ridges

Volcanic cones

Mounds

Mass slope instabilities

URI

https://oskar-bordeaux.fr/handle/20.500.12278/188003

DOI

http://dx.doi.org/10.1016/j.margeo.2020.106383

Proyecto ANR

Clermont-Ferrand centre for research on volcanism - ANR-10-LABX-0006
CAP 20-25 - ANR-16-IDEX-0001

Centros de investigación

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805