Cl versus F in, (A) arc melt inclusions, slab and mantle wedge, (B, C, and D) predicted melts. (A) Melt inclusions data are compiled from recent studies (see text). Each thin line represents a constant Cl/F ratio. (B) Melt compositions derived from anhydrous mantle (DMM, blue diamond) are predicted by the dark gray curve. Predicted melts’ compositions calculated for fluid-induced melting of a spinel lherzolite are indicated by the dotted curve for low degree (α = 0.026), dashed for intermediate (α = 0.049), and solid curves for high (α = 0.059) and very high degree of melt production rate for a unit flux (α = 0.1). Fluid composition is from Straub and Layne () (black star). Fluid-induced melting of an amphibole-bearing wehrlite is indicated by gray curves: dashed for α = 0.043 and dotted for α = 0.059. Each curve is graduated as a function of degree of melting (from 1% to 20%). See text for details on the model parameters. The gray line represents the mixing line between the fluid composition (Straub and Layne, ) and the DMM. Compositions of aqueous fluid from Le Voyer et al. () and slab melt from Le Voyer et al. () are shown for comparison (gray star and white star, respectively). (C) F and Cl compositions of melts produced by fluid-induced melting of a lherzolite metasomatized by an aqueous fluid from Le Voyer et al. (). (D) F and Cl compositions of melts produced by fluid-induced melting of a lherzolite metasomatized by slab-derived melt from Le Voyer et al. ().