Timescales of magmatic processes during the eruptive cycle 2014–2015 at Piton de la Fournaise, La Réunion, obtained from Mg–Fe diffusion modelling in olivine

Piton de la Fournaise started a new eruptive cycle in June 2014 after 41 months of quiescence. The small eruptions in June, February 2015, May, and July produced evolved basalts, whereas magmas of the large August–November eruption became increasingly mafic. Compositional zoning of olivine crystals was analysed to model diffusion times representing residence times between magma mixing and eruption. These correlate to the geophysical and...