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Progress in Earth and Planetary Science
Figure 3 | Progress in Earth and Planetary Science

Figure 3

From: Natural moissanite (SiC) – a low temperature mineral formed from highly fractionated ultra-reducing COH-fluids

Figure 3

Isopleths of olivine composition in terms of X Mg in the same harzburgitic bulk composition as in Figure 2 for (a) 2 GPa and (b) 10 GPa. Within two log-units of the metal forming reaction, X Mg olivine increases to 0.99, when reaching the SiC-buffer, olivines are essentially Fe-free. X Mg olivine is almost constant in the stability fields of magnesite or graphite/diamond. The grey field corresponds to olivine + orthopyroxene saturation and only additional phases are indicated.

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