Palaeomagnetic study of a sub-aerial volcanic ridge (Sao Jorge Island, Azores) for the past 1.3 Myr : evidence for the Cobb Mountain Subchron, volcano flank instability and tectono-magmatic implications

• Published in: Geophysical Journal International
• Main Authors: Silva, P.F., Henry, B., Marques, F.O., Hildenbrand, A., Madureira, P., Mériaux, C.A., Kratinova, Z.
• Other Authors: Faculdade de Ciências Lisboa, Universidade de Lisboa (ULISBOA), Institut de Physique du Globe de Paris (IPGP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Interactions et dynamique des environnements de surface (IDES), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centro de Geofisica de Évora (CGE), Universidade de Évora, Geophysical Institute Prague, Czech Academy of Sciences Prague (CAS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2012
• Subjects: Palaeomagnetic secular variation; Palaeomagnetism applied to tectonics; Palaeo- magnetism applied to geologic processes; Reversals: process; time scale; magnetostratigraphy; Rock and mineral magnetism; Atlantic Ocean; [SDU.STU]Sciences of the Universe [physics]/Earth Sciences; Jorge Island; Tilting
• Online Access: https://hal.archives-ouvertes.fr/hal-00674959; https://hal.archives-ouvertes.fr/hal-00674959/document; https://hal.archives-ouvertes.fr/hal-00674959/file/188-3-959.pdf; https://doi.org/10.1111/j.1365-246X.2011.05320.x

International audience We present a palaeomagnetic study on 38 lava flows and 20 dykes encompassing the past 1.3 Myr on S. Jorge Island (Azores ArchipelagoNorth Atlantic Ocean). The sections sampled in the southeastern and central/western parts of the island record reversed and normal polarities, re...