The magmatic plumbing system beneath El Hierro (Canary Islands): constraints from phenocrysts and naturally quenched basaltic glasses in submarine rocks

Repeated magmatic intrusions at El Hierro Island following the 2011–2012 submarine eruption

“…These events provided a remarkable opportunity to study the magmatic plumbing system of El Hierro, a volcanic island exhibiting short-phases of monogenetic volcanism with significantly longer periods of quiescence. Our results corroborate the hypothesis of magma stagnation at the crustal-mantle discontinuity and the formation of a network of magma reservoirs distributed beneath the island (Albert et al, 2016;Stroncik et al, 2009). The recorded activity improves our understanding of how an oceanic intraplate volcanic island grows through repeated magmatic intrusions; well documented by seismic, GPS and InSAR observations in the case of the El Hierro Island.…”

“…Over the last 145 ka, volcanism has been monogenetic, characterized by the eruption of mafic magmas forming cinder cones and lava flows (Carracedo et al, 2001;Stroncik et al, 2009). These eruptive centers have been concentrated along three rifts, built on top of the remains of the previous edifices, which extend from the center of the island (Carracedo, 1994;Carracedo et al, 2001;Guillou et al, 1996) (Fig.…”

Insights into the evolution of an alkaline magmatic system: An in situ trace element study of clinopyroxenes from the Ditrău Alkaline Massif, Romania

“…The textural, zoning and compositional characteristics of clinopyroxene in petrologically and geochemically diverse volcanic and plutonic rocks have been extensively studied over the past 40 years (e.g., Wass, 1979;Duda and Schmincke, 1985;Dobosi et al, 1991;Dobosi and Fodor, 1992;Neumann et al, 1999;Nakagawa et al, 2002;Streck et al, 2002;Marks et al, 2004;Shane et al, 2008;Stroncik et al, 2009;Winpenny and Maclennan, 2011;Jankovics et al, 2012Jankovics et al, , 2016Ubide et al, 2014a, b;Gernon et al, 2016). These detailed mineral-scale studies have inferred the origin of different clinopyroxene populations, from open-and closed-system petrogenetic processes operating in subvolcanic magma storage systems to the evolution and ascent histories of different magmas (replenishment, magma mixing, mingling, xenocryst incorporation, fractional crystallisation and contamination).…”

Volcanic tremors: Good indicators of change in plumbing systems during volcanic eruptions

“…The formation of El Hierro has been affected by large sector collapses that have left scars at El Golfo, Las Playas and El Julan (Fig.1). Stroncik et al (2009) suggest that this island's plumbing system is characterised by a multi-stage ascent of magmas with major fractionation in the uppermost mantle, where incoming magma batches mingle or mix thoroughly with other ascending batches.…”