Article: Geochemical, [sup.40]Ar/[sup.39]Ar age, and isotopic data for crustal rocks of the Neyriz ophiolite, Iran.

Abstract: Trace-element data (including the rare-earth elements) in the crustal sequence of the Neotethyan Neyriz ophiolite in southwest Iran indicate normal mid-ocean ridge basalt (N-MORB) or island-arc tholeiite chemistry for the Tang-e Hana basalt. The data suggest that the Tang-e Hana rhyodacite, basalt, plagiogranite, and gabbro derived from a low-K tholeiitic parent magma. Trace-element distributions in amphibolite clasts, in the sole detachment of the ophiolite south of Lake Neyriz, correlate well with distributions in basalt clasts in the melange and in the Tang-e Hana basalt. These trace elements suggest that the amphibolite originated from metamorphism and ...

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