Role of subducted sediments in island-arc magmatism Constraints from REE patterns

Details Role of subducted sediments in island-arc magmatism Constraints from REE patterns Role of subducted sediments in island-arc magmatism Constraints from REE patterns

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981e%26psl..54..423m&link_type=abstract

Earth and Planetary Science Letters, vol. 54, no. 3, Aug. 1981, p. 423-430.

Other

19

Europium, Igneous Rocks, Island Arcs, Magma, Rare Earth Elements, Sedimentary Rocks, Basalt, Earth Crust, Earth Mantle, Geochemistry, Sediments, Volcanoes

Scientific paper

Continental sedimentary rocks of post-Archean age are characterized by europium depletion relative to the other REE. Typical values for the ratio of Eu to the theoretical value for no chondrite-normalized Eu anomaly are 0.65 + or - 0.05. Basalts and andesites from island-arc suites rarely display significant europium anomalies. Calculations indicate that the maximum amount of sediment that can be admixed without producing a signature of Eu depletion is: (1) 10% for a mid-ocean ridge basalt source; (2) 1% for primitive mantle or a single-stage depleted mantle; and (3) 0.1-0.3% for a two-stage depleted mantle.

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