Arculus, R.J., J.B. Dawson, R.H. Mitchell, and D.A. Gust. 1982. “The Instrinsic Oxygen Fugacites (fO2’s) of Megacryst Ilmenites from Southern Africa Kimberlites, Type A and B Spinel Peridotites from San Carlos, Arizona”. International Kimberlite Conference: Extended Abstracts 3 (September):228-28. https://doi.org/10.29173/ikc2320.