The enigma of crustal zircons in upper-mantle rocks: Clues from the Tumut ophiolite, southeast Australia

Abstract

We suggest a new explanation for the presence of crustally derived zircons in the upper-mantle rocks of ophiolitic complexes, as an alternative to subduction-related models. Integrated isotopic (U-Pb, Hf, and O isotopes) and trace-element data for zircons