RT info:eu-repo/semantics/article T1 Aeromagnetic anomalies reveal the link between magmatism and tectonics during the early formation of the Canary Islands A1 Blanco Montenegro, Isabel A1 Montesinos, Fuensanta G. . A1 Arnoso, José . K1 Física K1 Physics AB The 3-D inverse modelling of a magnetic anomaly measured over the NW submarine edifice of thevolcanic island of Gran Canaria revealed a large, reversely-magnetized, elongated structure followingan ENE-WSW direction, which we interpreted as a sill-like magmatic intrusion emplaced during thesubmarine growth of this volcanic island, with a volume that could represent up to about 20% of thewhole island. The elongated shape of this body suggests the existence of a major crustal fracture in thecentral part of the Canary Archipelago which would have favoured the rapid ascent and emplacement ofmagmas during a time span from 0.5 to 1.9 My during a reverse polarity chron of the Earth’s magneticfield prior to 16 Ma. The agreement of our results with those of previous gravimetric, seismological andgeodynamical studies strongly supports the idea that the genesis of the Canary Islands was conditionedby a strike-slip tectonic framework probably related to Atlas tectonic features in Africa. These results donot contradict the hotspot theory for the origin of the Canary magmatism, but they do introduce theessential role of regional crustal tectonics to explain where and how those magmas both reached thesurface and built the volcanic edifices. PB Nature Publishing Group SN 2045-2322 YR 2018 FD 2018-01 LK http://hdl.handle.net/10259/4716 UL http://hdl.handle.net/10259/4716 LA eng NO Project CGL2015-63799-P of theSpanish Ministry of Economy and Competitiveness DS Repositorio Institucional de la Universidad de Burgos RD 29-mar-2024