Palaeomagnetism and the early magmatic history of Fuerteventura (Canary Islands)

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K.M. Storetvedt
H. Mongstad Vage
S. Aase
R. Lovlie

Abstract

Thermal and alternating field demagnetization combined with studies of the convergence points of remagnetization circles have been carried out on a variety of '"ocks from Fuerteventura. The older (post-Albian) rocks, including the basement plutonics, the sheeted dike complex and the earliest subaerial lava sequence (lava Series I), have a multicomponent remanence while the younger lava Series II of Miocene/Pliocene age has dominantly a one-component magnetization. Comparison of the results with recent palaeomagnetic data from Gran Canaria/Tenerife and with results from continental Africa and Europe suggest a late Cretaceous origin of the basal intrusive rocks while the subaerial volcanism (lava Series I) most likely initiated at around the Cretaceous/Tertiary boundary. This implies that there is a nearly 50-m.y.-long period of volcanic quiescence and erosion between lava Series I and lava Series II. The apparent contradiction between these conclusions and the few K/Ar dates available is discussed.


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How to Cite
Storetvedt, K.M., H. Mongstad Vage, S. Aase, and R. Lovlie. 1979. “Palaeomagnetism and the Early Magmatic History of Fuerteventura (Canary Islands)”. Journal of Geophysics 46 (1), 319-34. https://journal.geophysicsjournal.com/JofG/article/view/281.
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