1-s2.0-S0024493720304941-gr4_lrg.jpg

Fig. 4. F/Cl vs F content of partial melts: Calculated F/Cl of melts derived from metasomatized mantle sources with different modal abundances of amphibole and mica (blue lines). The black dashed lines denoted as DM and EM, show the F/Cl ratio of melts from an anhydrous mantle (without amphibole and mica) with a DM halogen content after Salters and Stracke (2004), and relatively elevated halogen content (EM) after Shimizu et al. (2016) The grey area depicts our modeled metasomatized mantle based on the calculated F/Cl of melts that were derived from amphibole and/or mica bearing sources with DF > 1 (for both of these phases). The blue dotted curves represent the best fit of similar degrees of melting for the metasomatized sources, calculated from our model. For example, after 5% of melting the melts from the source “10.5 amph – 2.9 mica” will have a F/Cl of ~7, while the melts from the source “4 amph – 1 mica” will have F/Cl of ~15. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)