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Fig. 7. F/Nd vs F content of partial melts: Calculated F/Nd of melts derived from metasomatized mantle sources with different modal abundances of amphibole and mica (blue lines). The black dashed line, depicted as DM, shows the evolution of melts derived from a depleted MORB mantle with F and Nd contents after Salters and Stracke (2004). The black dashed line, depicted as EM, represents F/Nd of melts coming from a relatively enriched MORB mantle source (Donnelly et al., 2004; Shimizu et al., 2016) The light grey area depicts calculated F/Nd of melts that were derived from an amphibole and/or mica bearing source. The green line shows the F/Nd values of melts coming from a F-rich source (1amp-4mica). The dark grey area shows the overlap of the F/Nd values between metasomatized and F-rich sources (different F, Nd contents, minerals abundances and degrees of partial melting). The black dashed curves represent the best fit of similar degrees of melting for the metasomatized sources, calculated from our model. After 10% of melting the melts from the source “10.5 amp – 2.9 mica” will have a F/Nd of ~130, while the melts from the source “4 amp – 1 mica” will have F/Nd of ~95. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)