Table 1 High-temperature minerals.
Phase | Formula | ~Equilib Melt T (°C) | ~Est. Flux Melt T (°C) | ~Equilib Boil T (°C) | Est. O2 Fugacity (log) | Oxygen Fugacity Buffer |
|---|---|---|---|---|---|---|
Chromite | (Fe)Cr2O4 | 2265 | 2065 | 2642 | −14 | — |
Monazite | (Ce, La, Nd, Th)PO4 | 2072 | 1872 | 2230 | — | — |
Titanium sulfide | TiS | 1780 | 1580 | — | — | — |
Zircon | ZrSiO4 | 1775 | 1575 | 2550 | — | — |
Chert | SiO2 | 1720 | 1520 | 2230 | — | — |
Quartz | SiO2 | 1720 | 1520 | 2230 | — | — |
Titano-magnetite | Fe2+(Fe3+, Ti)2O4 | 1625 | 1425 | — | −3 | Magnetite-hematite |
Magnetite | Fe3O4 | 1590 | 1390 | 2623 | −3 | Magnetite-hematite |
Wollastonite | CaSiO3 | 1540 | 1340 | — | — | — |
Hematite | Fe2O3 | 1538 | 1338 | — | — | Magnetite-hematite |
Chlorapatite | Ca5(PO4)3Cl | 1530 | 1330 | — | — | — |
Nickel iron | NiFe | 1430 | 1230 | — | −12 | Iron-wustite |
Native iron | Fe | 1420 | 1220 | — | −12 | Iron-wustite |
Native Silicon | Si | 1414 | 1214 | — | — | — |
Iron silicide | FeSi | 1410 | 1210 | — | −15 | — |
Titanium phosphide | TiP | 1400 | 1200 | — | — | — |
Iron sulfide | FeS, Fe2S, Fe3S | 1200 | 1000 | — | — | — |
Iron phosphide | Fe3P | 1100 | 900 | — | — | — |
Ilmenite | FeTiO3 | 1050 | 850 | — | — | — |
