A) Spirit Mountain geologic map modified from Walker et. al (2007). Bulk rock geochemistry data is available for all samples in panel A. The pluton has been tilted ca. 45ยบ westward during exhumation. In later sections, the distances above the deepest sample (red triangle in panel A) are calculated by projecting the samples orthogonally onto the dashed, red line in panel A. The distances are then adjusted for post-emplacement tilting of the batholith and are intended to reflect variations in paleo-depth. Panel B, C, and D show Spirit Mountain geology zoomed in. B) Samples highlighted in yellow are those included in transect analyzed using unmixing model developed in later sections. C) Samples highlighted in pink are samples analyzed via Electron Probe Microanalyzer (EPMA) in the present study. D) Samples highlighted in blue are those that are investigated texturally in later sections. In subsequent figures, samples from this study and Walker et. al (2007) are no longer distinguished, for readability, and samples included in transect appear yellow and all other samples are white.