Rare earth abundances in the alkaline volcanic rocks from Campania, South Italy

Details Rare earth abundances in the alkaline volcanic rocks from Campania, South Italy Rare earth abundances in the alkaline volcanic rocks from Campania, South Italy

Dec 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972e%26psl..17..247c&link_type=abstract

Earth and Planetary Science Letters, vol. 17, Issue 1, pp.247-257

Physics

10

Scientific paper

Eight rare earth elements (La, Ce, SM, Eu, Tb, Dy, Yb, Lu) were determined by group separation neutron activation in the most typical members of the potash-rich Campania volcanic suite. The rare earth abundances are discussed in terms of the models proposed by several authors for the evolution of the single volcanoes and the origin of the potash-rich magmas. Although the rare earth data are not highly discriminative for some of the proposed models, nevertheless they indicate that it is quite unlikely that these magmas derive from differentiation processes involving continental or island-arc alkali basaltic parental magmas. The available data fit well a model involving high pressure partial melting of a continental crust in which a liquid in equilibrium with a pyroxene-garnet solid assemblage is formed.

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