Fig. 9
From: Hydrous Na-garnet from Garnet Ridge; products of mantle metasomatism underneath the Colorado Plateau
A schematic model of modification of garnet chemistry during metasomatic processes at mantle depths. The dark-gray spot shows the representative chemical composition of group A, Cr-rich pyrope, the protolith of mantle metasomatism. The lighter gray area shows chemical compositions of group B: Cr-poor pyrope. Colored arrows indicate trends of chemical changes of group B garnet during mantle metasomatism