Calculated F compositions of the melts in equilibrium with micas (a) and amblygonite-group minerals (b) from investigated samples of Li-pegmatites of the FA field (filled symbols). The compositions of the melts equilibrated with micas from regional leucogranites (Figueira de Castelo Rodriguo-Lumbrales − FCL complex and Feli intrusion) and from a Li-mica-rich and spodumene-bearing pegmatite are shown for comparison as empty symbols (data from Vieira, 2010). Mica/granitic melt partitioning coefficients (Kd) correspond to the mean of minimum and maximum values for dioctahedral (muscovite) and trioctahedral (biotite) micas compiled in Villaros and Pichavant (2019) and error bars show the deviation based on the use of min and max Kd values (see inset). We use biotite Kd values for trioctahedral Li-muscovite and lepidolite as no value is available for such mica compositions. The F concentrations of the melts in equilibrium with AGM are calculated using the regression of London et al. (2001) (see inset). Low-F AGM in P010 pegmatite are interpreted as altered.