Some of the most diverse igneous rocks found on Earth occur along the length of Italy and in many of the islands in the southeastern Tyrrhenian Sea, all the result of Cenozoic magmatism. Magmas extremely rich in alkalis, particularly potassium, and many undersaturated with respect to silica, were erupted, as well as others of calc-alkalic affinity . Their origin has been the subject of heated debate, and there is still no general consensus about how they formed. Most attribute them to subduction-related processes (Beccaluva et al. 2004, for a review); others consider them to be the result of within-plate magmatism [e.g., Vollmer, 1976; Lavecchia and Stoppa, 1996]. Still others consider magmatism the result of a deep, mantle upwelling within a slab window coupled with mixing between isotopically different reservoirs [Gasperini et al., 2002].
Is there a mantle plume below Italy? / Bell, K; Castorina, Francesca; Lavecchia, G; Rosatelli, G; Stoppa, F.. - In: EOS. - ISSN 0096-3941. - 85:50(2004), pp. 541-546.
Is there a mantle plume below Italy?
CASTORINA, Francesca;
2004
Abstract
Some of the most diverse igneous rocks found on Earth occur along the length of Italy and in many of the islands in the southeastern Tyrrhenian Sea, all the result of Cenozoic magmatism. Magmas extremely rich in alkalis, particularly potassium, and many undersaturated with respect to silica, were erupted, as well as others of calc-alkalic affinity . Their origin has been the subject of heated debate, and there is still no general consensus about how they formed. Most attribute them to subduction-related processes (Beccaluva et al. 2004, for a review); others consider them to be the result of within-plate magmatism [e.g., Vollmer, 1976; Lavecchia and Stoppa, 1996]. Still others consider magmatism the result of a deep, mantle upwelling within a slab window coupled with mixing between isotopically different reservoirs [Gasperini et al., 2002].I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.