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Crustal magnetization of Brothers volcano, New Zealand, measured by autonomous underwater vehicles: / F. Caratori Tontini in Economic geology, Vol. 107 N° 8 (Décembre 2012) 

Public ISBD [article]  in Economic geology > Vol. 107 N° 8 (Décembre 2012) . - pp. 1571-1581 Titre : Crustal magnetization of Brothers volcano, New Zealand, measured by autonomous underwater vehicles: : geophysical expression of a submarine hydrothermal system Type de document : texte imprimé Auteurs : F. Caratori Tontini, Auteur ; B. Davy, Auteur ; Cornel E. J. de Ronde, Auteur Année de publication : 2013 Article en page(s) : pp. 1571-1581 Note générale : economic geology Langues : Anglais (eng) Mots-clés : Near-bottom  magnetic  anomaly;  Brothers  volcano;  crustal  magnetization Résumé : Near-bottom magnetic anomaly data have been acquired using autonomous underwater vehicles at Brothers volcano, southern Kermadec arc, New Zealand. Crustal magnetization for the study area was obtained by inverting the magnetic data and shows a strong correlation between areas of low magnetization and four hydrothermal fields, one of which was unknown prior to our surveys. The magnetization pattern is consistent with a model of discrete, individual zones of fluid upflow focused along caldera ring faults that provide preferred pathways for the ascent of the hydrothermal fluids. Differences in the amplitude of the magnetization over the vent fields appear to correlate with age and temperature variations of the hydrothermal fields. DEWEY : 553 ISSN : 0361-0128 En ligne : http://econgeol.geoscienceworld.org/content/107/8/1571.short [article] Crustal magnetization of Brothers volcano, New Zealand, measured by autonomous underwater vehicles: : geophysical expression of a submarine hydrothermal system [texte imprimé] / F. Caratori Tontini, Auteur ; B. Davy, Auteur ; Cornel E. J. de Ronde, Auteur . - 2013 . - pp. 1571-1581. economic geology Langues : Anglais (eng) in Economic geology > Vol. 107 N° 8 (Décembre 2012) . - pp. 1571-1581 Mots-clés : Near-bottom  magnetic  anomaly;  Brothers  volcano;  crustal  magnetization Résumé : Near-bottom magnetic anomaly data have been acquired using autonomous underwater vehicles at Brothers volcano, southern Kermadec arc, New Zealand. Crustal magnetization for the study area was obtained by inverting the magnetic data and shows a strong correlation between areas of low magnetization and four hydrothermal fields, one of which was unknown prior to our surveys. The magnetization pattern is consistent with a model of discrete, individual zones of fluid upflow focused along caldera ring faults that provide preferred pathways for the ascent of the hydrothermal fluids. Differences in the amplitude of the magnetization over the vent fields appear to correlate with age and temperature variations of the hydrothermal fields. DEWEY : 553 ISSN : 0361-0128 En ligne : http://econgeol.geoscienceworld.org/content/107/8/1571.short