Aeromagnetic anomalies reveal the link between magmatism and tectonics during the early formation of the Canary Islands.

ABSTRACT: The 3-D inverse modelling of a magnetic anomaly measured over the NW submarine edifice of the volcanic island of Gran Canaria revealed a large, reversely-magnetized, elongated structure following an ENE-WSW direction, which we interpreted as a sill-like magmatic intrusion emplaced during the submarine growth of this volcanic island, with a volume that could represent up to about 20% of the whole island. The elongated shape of this body suggests the existence of a major crustal fracture in the central part of the Canary Archipelago which would have favoured the rapid ascent and emplacement of magmas during a time span from 0.5 to 1.9 My during a reverse polarity chron of the Earth's magnetic field prior to 16 Ma. The agreement of our results with those of previous gravimetric, seismological

SUBMITTER: Blanco-Montenegro I 

PROVIDER: S-EPMC5758788 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature