Submarine morphology of the Comoros volcanic archipelago
Langue
EN
Article de revue
Ce document a été publié dans
Marine Geology. 2021-02, vol. 432, p. 106383
Résumé en anglais
A detailed morpho-bathymetric study of the Comoros archipelago, based on mostly unpublished bathymetric data, provides a first glimpse into the submarine section of these islands.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 ...Lire la suite >
A detailed morpho-bathymetric study of the Comoros archipelago, based on mostly unpublished bathymetric data, provides a first glimpse into the submarine section of these islands.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.< Réduire
Mots clés en anglais
Comoros archipelago
Morpho-bathymetry
Submarine volcanism
Volcanic ridges
Volcanic cones
Mounds
Mass slope instabilities
Project ANR
Clermont-Ferrand centre for research on volcanism - ANR-10-LABX-0006
CAP 20-25 - ANR-16-IDEX-0001
CAP 20-25 - ANR-16-IDEX-0001