Évolution Temporelle et Spatiale du Système d'Interaction entre le point chaud de Tristan da Cunha et la Dorsale de l'Atlantique Sud.

• Main Author: Machado Pessanha, Ivo Bruno
• Other Authors: Domaines Océaniques (LDO), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS), Université de Bretagne occidentale - Brest, Marcia Maia([e-mail])
• Format: Doctoral or Postdoctoral Thesis
• Language: French
• Published: HAL CCSD 2011
• Subjects: hotspot; mid-ocean ridge; South Atlantic; Walvis Ridge; Rio Grande Rise; geoid; kinematics reconstructions; axial jumps; African plate; South America plate; plume flux; isotopic ratio; spherical harmonics; point chaud; Tristan da Cunha; dorsale; Atlantique Sud; chaîne Walvis; élévation du Rio Grande; MBA; RMBA; géoïde; reconstructions cinématiques; sauts d'axes; plaque africaine; plaque sud-américaine; flux de panache; rapport isotopique; harmoniques sphériques; Gough et RSA; [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]; [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]; [SDE.MCG]Environmental Sciences/Global Changes; Dorsale; Gough; La Dorsale; Mid-Atlantic Ridge; Tristan; Iceland; North Atlantic; South Atlantic Ocean
• Online Access: https://tel.archives-ouvertes.fr/tel-00652905; https://tel.archives-ouvertes.fr/tel-00652905/document; https://tel.archives-ouvertes.fr/tel-00652905/file/PESSANHA_ivo_2011_these-1.pdf

In this work we have studied the space and time evolution of the Tristan hotspot and south Mid-Atlantic Ridge interaction system. The Tristan hotspot and its associated bathymetrical features (i.e. Walvis Ridge in the African plate and Rio Grande Rise in the South American plate) are ones of the mos...