Relative depletion of niobium in some arc magmas and the continental crust : partitioning of K , Nb , La and Ce during melt / rock reaction in the upper mantle

@inproceedings{Shimizu2002RelativeDO,
  title={Relative depletion of niobium in some arc magmas and the continental crust : partitioning of K , Nb , La and Ce during melt / rock reaction in the upper mantle},
  author={Nobumichi Shimizu and Todd Dunn},
  year={2002}
}
Depletion of Nb relative to K and La is characteristic of lavas in subduction-related magmatic arcs, as distinct from mid-ocean ridge basalts. Nb depletion is also characteristic of the continental crust. This and other geochemical similarities between the continental crust and high-Mg# andesite magmas found in arcs suggests that the continental crust may have formed by accretion of andesites. Previous studies have shown that the major element characteristics of high-Mg# andesites may be… CONTINUE READING

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