Nd-Sr isotopic study of primitive lavas from the Troodos ophiolite, Cyprus: Evidence for a subduction-related setting Available to Purchase

Primitive lavas from the Troodos ophiolite have a large variation in initial ¹⁴³Nd/¹⁴⁴Nd ratios; from ϵ_Nd = + 7.9 to 0.8, which precludes a mid-ocean ridge origin. Initial ⁸⁷Sr/⁸⁶Sr ratios vary from 0.70415 to 0.70705. The range of ϵ_Nd values may be accounted for by a two-component mixing model whereby variable amounts of a light rare-earth-element (REE)-enriched component with ϵ_Nd between −5 and −7 has interacted with a depleted Iherzolite source with ϵ_Nd ≥ +8. This is consistent with an arc-related setting where fluids derived from a subducting slab induce further melting in an overlying Iherzolite source.