Resultados preliminares de um estudo paleomagnético da ilha do Faial (Arquipélago dos Açores)

• Main Authors: Silva, Pedro, Henry, Bernard, Hildenbrand, Anthony, Marques, Fernando, Madureira, Pedro
• Format: Book Part
• Language: English
• Published: Sersilito; Edição a cargo de C. Sousa Oliveira; Aníbal Costa; João C. Nunes 2008
• Subjects: Paeomagnetismo; Ilha do Faial; North Atlantic
• Online Access: http://hdl.handle.net/10174/2592

We present preliminary paleomagnetic results dor Faial Island (central group of Azores Archipelago, North Atlantic Ocean). Our sampling strategy was focused on a collection of samples from lava flows that represent a large temporal window according to previous geochronological data. Main results show that: (i) onshore volcanic activity began during the Matuyama geomagnetic chron; (ii) the southern branch of the Faial graben probably corresponds to an oldest volcano; (iii) paleomagnetic results from the northern branch strongly suggest that all lava sequence from this site was erupted durong Brunhes Geochron; (iv) paleomagnetic results yeld a first paleomagnetic pole for Faial Island defined by φ = 133.8º, λ = 80.2ºN.