Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/44230
Título: Small-scale mantle heterogeneity on the source of the Gran Canaria (Canary Islands) Pliocene-Quaternary magmas
Autores/as: Aulinas, M.
Gimeno, D.
Fernandez-Turiel, J. L.
Font, L.
Perez-Torrado, F. J. 
Rodriguez-Gonzalez, A. 
Nowell, G. M.
Clasificación UNESCO: 250621 Vulcanología
Palabras clave: Magmas
Pliocene-Quaternary
Gran Canaria island
Fecha de publicación: 2010
Publicación seriada: Lithos 
Resumen: New chemical and Sr–Nd–Pb isotopic data of the Plio-Quaternary mafic lavas of Gran Canaria are used to investigate their mantle source composition. The most prominent aspects of the new dataset are the slight isotopic differences between the Plio-Quaternary (Post-Roque Nublo Group) and the older Pliocene (Roque Nublo Group) mafic parental magmas, which reflect small-scale mantle heterogeneities. Melting of two mantle materials, one isotopically more depleted and similar to the Depleted Mantle (DM) and the other with more radiogenic Pb-isotope ratios comparable to a mantle with high U/Pb ratio (HIMU), accounts for the isotopic and trace element composition of the Pliocene–Quaternary magmas of Gran Canaria. Geochemical variations show that the Pliocene–Quaternary mantle source is compositionally and lithologically heterogeneous and supports the presence of a silica-deficient pyroxenite mantle component. The contribution of the pyroxenite component in the generation of the Roque Nublo and Post-Roque Nublo magmas is estimated to be in the range from 50 to 70%. Trace element ratios support mixing between the two mantle components (pyroxenite veins in a peridotite matrix) which obscure the original chemical and isotopic composition of these two end-members.
URI: http://hdl.handle.net/10553/44230
ISSN: 0024-4937
DOI: 10.1016/j.lithos.2010.07.016
Fuente: Lithos [ISSN 0024-4937], v. 119 (3-4), p. 377-392
Colección:Artículos
Vista completa

Citas SCOPUSTM   

17
actualizado el 24-mar-2024

Citas de WEB OF SCIENCETM
Citations

16
actualizado el 25-feb-2024

Visitas

21
actualizado el 13-may-2023

Google ScholarTM

Verifica

Altmetric


Comparte



Exporta metadatos



Los elementos en ULPGC accedaCRIS están protegidos por derechos de autor con todos los derechos reservados, a menos que se indique lo contrario.