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dc.rights.licenseopenen_US
dc.contributor.authorBOYMOND, P.
dc.contributor.authorFEUILLET, N.
dc.contributor.authorTHINON, I.
dc.contributor.authorSCHOLTÈS, L.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorZARAGOSI, Sebastien
IDREF: 189039159
dc.contributor.authorLEROY, S.
dc.contributor.authorLEMOINE, A.
dc.date.accessioned2025-02-12T13:02:42Z
dc.date.available2025-02-12T13:02:42Z
dc.date.issued2025
dc.identifier.issn1525-2027en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/204819
dc.description.abstractAbstractTwo volcanic provinces have been recently discovered during the SISMAORE oceanographic cruise in the Comoros archipelago in the North Mozambique Channel between Madagascar and East Africa: N’Droundé, along the North‐eastern insular slopes of Grande Comores Island and Mwezi, in the abyssal plain, north‐east of Mayotte and Anjouan islands. By combining bathymetry and backscatter data, high‐resolution seismic reflection and sub‐bottom profiles, we have identified and mapped various tectonic (faults, forced folds) and volcanic structures (lava flows, edifices, sills, dykes) at several spatial scales on the seabed and in cross‐section within the sedimentary cover. We have characterized the volcano‐tectonic structures (geometry, segmentation, and kinematics) to better understand the link (geometry, chronology) between tectonic and volcanic processes. We show that volcanic and tectonic features are controlled by tectonic processes and vice‐versa. Ridges, volcanic cones and lava flows are set up along fissures and dikes during main rifting events to accommodate a N40°E regional extension within an E‐W right lateral shear transfer zone. The volcano tectonic features are Plio‐Pleistocene. This transfer zone lies between the offshore branch of the East African rift system and Malagasy grabens and may have formed when the East African rifts propagated offshore. We evidence a major rifting episode in the last Ma. The estimated volume and flux of extruded lavas show that the volcanism of the Comoros could be related to shallow tectonic processes.
dc.description.sponsorshipCOmores & maYotte : vOlcanisme, TEctonique et Sismicité - ANR-19-CE31-0018en_US
dc.language.isoENen_US
dc.rightsAttribution 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/us/*
dc.titleEn‐échelon Rifting and Origin of the Volcanism in the Comoros
dc.typeArticle de revueen_US
dc.identifier.doi10.1029/2024gc011576en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalGeochemistry, Geophysics, Geosystemsen_US
bordeaux.volume26en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue2en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamGEOLSEDen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcecrossref
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcecrossref
dc.rights.ccCC BYen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.title=En%E2%80%90%C3%A9chelon%20Rifting%20and%20Origin%20of%20the%20Volcanism%20in%20the%20Comoros&rft.atitle=En%E2%80%90%C3%A9chelon%20Rifting%20and%20Origin%20of%20the%20Volcanism%20in%20the%20Comoros&rft.jtitle=Geochemistry,%20Geophysics,%20Geosystems&rft.date=2025&rft.volume=26&rft.issue=2&rft.eissn=1525-2027&rft.issn=1525-2027&rft.au=BOYMOND,%20P.&FEUILLET,%20N.&THINON,%20I.&SCHOLT%C3%88S,%20L.&ZARAGOSI,%20Sebastien&rft.genre=article


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