Figure F27. A. Plot of the variation in NiO in olivine vs. Fo showing rapid depletion due to its compatible nature during olivine crystallization. B. Plot of MnO vs. Fo showing a strong enrichment trend because of its incompatible nature during olivine, clinopyroxene, and plagioclase crystallization. Note small gap in compositions also noted by Thy (Chap. 3, this volume). Electron microprobe data collected using the University of Houston JEOL Superprobe.

Figure F27. A. Plot of the variation in NiO in olivine vs. Fo showing rapid depletion due to its compatible nature during olivine crystallization. B. Plot of MnO vs. Fo showing a strong enrichment trend because of its incompatible nature during olivine, clinopyroxene, and plagioclase crystallization. Note small gap in compositions also noted by Thy (Chap. 3, this volume). Electron microprobe data collected using the University of Houston JEOL Superprobe.