Table 2.
Composition of phases (wt %)
| Run no. | S968 | S1176 | S997 | |||||||
| P, T* | 0.5, 1350 |
2.0, 920 |
2.8, 1350 |
|||||||
| Phase† |
M |
M100‡ |
Am |
Cpx |
M |
M100 |
M |
M100 |
F |
F100 |
| n§ | 10 | — | 7 | 5 | 11 | — | 35 | — | 34 | — |
| SiO2 | 45.40 (0.47) | 50.81 | 44.42 (0.48) | 47.68 (0.97) | 48.50 (0.89) | 57.81 | 36.33 (1.94) | 49.98 | 18.21 (5.45) | 63.49 |
| Al2O3 | 16.19 (0.13) | 18.12 | 15.89 (0.49) | 12.39 (1.63) | 19.10 (0.38) | 22.77 | 12.77 (0.48) | 17.57 | 4.53 (1.40) | 15.80 |
| FeO | 5.03 (0.03) | 5.62 | 9.22 (0.63) | 8.54 (0.66) | 4.42 (0.21) | 5.27 | 7.40 (0.36) | 10.18 | 1.82 (0.55) | 6.35 |
| MgO | 8.29 (0.14) | 9.28 | 14.77 (0.94) | 11.12 (1.64) | 2.90 (0.16) | 3.45 | 6.66 (0.37) | 9.16 | 1.80 (0.56) | 6.27 |
| CaO | 12.41 (0.18) | 13.89 | 10.88 (0.37) | 19.68 (1.50) | 8.10 (0.35) | 9.65 | 8.32 (0.78) | 11.44 | 1.78 (1.39) | 6.21 |
| Na2O | 1.96 (0.08) | 2.19 | 2.00 (0.11) | 0.44 (0.25) | 0.80 (0.14) | 0.95 | 1.16 (0.49) | 1.59 | 0.48 (0.21) | 1.67 |
| K2O | 0.08 (0.01) | 0.09 | 0.07 (0.01) | 0.01 (0.01) | 0.08 (0.02) | 0.10 | 0.06 (0.02) | 0.08 | 0.06 (0.02) | 0.21 |
| Total | 89.36 (0.56) | 100.00 | 97.25 (0.40) | 99.86 (1.42) | 83.90 (1.29) | 100.00 | 72.70 (2.32) | 100.00 | 28.68 (8.19) | 100.00 |
| Run no. | S1194 | S1077 | S1081 | ||||||
| P, T | 3.0, 1010 |
3.6, 1130 |
3.6, 1130 |
||||||
| Phase |
M |
M100 |
F |
F100 |
SCF |
SCF100 |
Gt |
SCF |
SCF100 |
| n | 19 | — | 34 | — | 11 | — | 9 | 15 | — |
| SiO2 | 35.62 (1.91) | 48.78 | 16.04 (3.19) | 65.23 | 33.37 (1.65) | 51.31 | 40.70 (0.46) | 40.59 (1.92) | 55.90 |
| Al2O3 | 12.49 (0.74) | 17.10 | 3.92 (0.79) | 15.94 | 10.62 (0.54) | 16.33 | 22.78 (0.19) | 10.87 (0.49) | 14.97 |
| FeO | 6.10 (0.37) | 8.36 | 1.11 (0.35) | 4.51 | 6.51 (0.56) | 10.01 | 14.93 (0.49) | 5.78 (0.27) | 7.96 |
| MgO | 6.64 (0.47) | 9.09 | 1.36 (0.49) | 5.53 | 5.35 (0.64) | 8.23 | 13.05 (0.46) | 4.64 (0.31) | 6.39 |
| CaO | 10.02 (0.78) | 13.73 | 1.27 (0.30) | 5.17 | 7.43 (1.43) | 11.42 | 8.97 (0.36) | 9.00 (0.89) | 12.39 |
| Na2O | 2.05 (0.46) | 2.81 | 0.82 (0.18) | 3.34 | 1.61 (0.28) | 2.47 | 0.02 (0.01) | 1.37 (0.26) | 1.89 |
| K2O | 0.09 (0.02) | 0.13 | 0.07 (0.02) | 0.28 | 0.15 (0.03) | 0.23 | 0.00 (0.00) | 0.36 (0.07) | 0.50 |
| Total | 73.01 (3.61) | 100.00 | 24.59 (4.44) | 100.00 | 65.04 (2.24) | 100.00 | 100.45 (0.75) | 72.61 (2.64) | 100.00 |
Numbers in parentheses represent one standard deviation.
*Pressure in GPa, quenched temperature in °C.
†Abbreviations are the same as in Table 1.
‡Normalized to 100 wt %.
§Number of analyses.