Melting and continent generation

Details Melting and continent generation Melting and continent generation

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..90..449o&link_type=abstract

Earth and Planetary Science Letters, Volume 90, Issue 4, p. 449-456.

Mathematics

Logic

29

Scientific paper

The fractionated rare earth distribution in the continents requires that a small melt fraction (~ 1%) separates at some stage in their development, either in the crust or in the mantle, and carries with it the continental budget of those elements. It is proposed that the very small melt fractions which control the continent's fractionated trace element budget are generated in response to lithospheric extension, plumes or aqueous fluids beneath island arcs, and emplaced into the deeper parts of the continental lithosphere. This budget is subsequently inherited by granite melts which only separate on relevant geological time scales when melt fractions reach 10% or more. The residence times of trace incompatible and major elements in the continents might be quite different.

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