RT Journal Article
T1 Evolución magmática de los últimos 3.6 Ma de actividad volcánica en Gran Canaria: Evidencias petrográficas y de química mineral
T1 Magmatic evolution of the last 3.6 Ma of volcanic activity in Gran Canaria (Canary Islands, Spain): petrographicand mineral chemistry evidences
A1 Aulinas, Maritxell
A1 Gimeno, Domingo
AB New petrographic and mineral chemistry data obtained in 50 samples of the Post-Roque Nublo Group ofGran Canaria (Canary Islands, Spain) are presented. All the samples are well-known from a geochemicalpoint of view and have been accurately studied (Gimeno et al. , 2003; Guillou et al., 2004). The morenoteworthy petrographic feature is the presence of zoned clinopyroxene with green core (salitic composition)and brownish rim (diopsidic-salitic composition) in most of the samples. To explain this compositionalvariation it is suggested that magma mixing played an important role during magmatic evolution. Furthermorefractional crystallisation of basic magmas is needed to obtain most evolved ones. We suggest that crystalfractionation and magma mixing took place in magma reservoirs located at depths of 20 to 27 km and at10 to 14 km. The proposed magma evolution model also explains the compositional variations within thePost-Roque Nublo Group
YR 2006
FD 2006
LK http://hdl.handle.net/10272/8474
UL http://hdl.handle.net/10272/8474
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026