Derivation of some modern arc magmas by melting of young subducted lithosphere

Details Derivation of some modern arc magmas by melting of young subducted lithosphere Derivation of some modern arc magmas by melting of young subducted lithosphere

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.347..662d&link_type=abstract

Nature (ISSN 0028-0836), vol. 347, Oct. 18, 1990, p. 662-665.

Physics

282

Earth Mantle, Igneous Rocks, Lithosphere, Fractionation, Magma, Melting, Rhyolite, Subduction (Geology)

Scientific paper

Rocks with the geochemical characteristics of melts derived directly from subducted lithosphere are present in some modern island and continental arcs where relatively young and hot lithosphere is being subducted. These andesites, dacites, and sodic rhyolites or their intrusive equivalents are usually not associated with parental basaltic magmas. It is shown here that the trace-element geochemistry of these magmas is consistent with a derivation by partial melting of the subducted slab, and in particular that subducting lithosphere younger than 25 Myr seems to be required for slab melting to occur.

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