The results of the thermodynamic simulations (phase mass as a function of temperature and composition of bulk liquid and bulk solids) are included in the supplementary Fig. 3, 4, and 5. In most cases, the majority of SMB data plot along tie-lines between solid and liquid equilibrium end members. When considering equilibrium crystallization, such as in these calculations, tie-lines connect liquid and solid lines of descent in equilibrium, while the exact points at which they are connected is a function of the mass crystallized (supplementary Fig. 5).
6. TRACE ELEMENT MODELING RESULTS – MELT AND CRYSTAL LOSS CALCULATIONS
Results from the trace element modeling suggest that the majority of samples from the upper portion of the SMB have accumulated significant amounts of Sr depleted melt. Samples from the lower portions of the batholith, on the other hand, show evidence of melt loss and crystal accumulation (Fig. 12). These results were obtained by solving for MLF in samples where the concentration of Sr is greater than that the assumed parental magma composition (Table 2) and by solving for MCLF in samples where the concentration of Sr is depleted compared to the assumed parental magma composition. The benefit of the trace element model is that it does not assume a physical process controlling phase separation.