|
N
|
Sample
|
Assemblage
|
PT conditions
|
|---|---|---|---|
| 1 | Interval 161-976E- | M1 | T = 617 ± 26°C |
|
|
14R-1 (Piece 3B, 40-45 cm) | Grt core + Pl inclusion + Bt inclusion + St + Als + Qtz | P = 8.0 ± 1.0 kbar |
| 2 | Interval 161-976E- | M1 | T = 650 ± 26°C |
|
|
14R-3 (Piece 1A, 10-14 cm) | Grt internal rim + Pl core + Bt inclusion + Als + Qtz | P = 6.5 ± 1.1 kbar |
| 3 | Interval 161-976E- | M2 | T = 692 ± 47°C |
|
|
14R-3 (Piece 1A, 10-14 cm) | Grt rim + Pl rim + Bt + Ksp + Als + Qtz | P = 6.5 ± 1.4 kbar |
| 4 | Interval 161-976E- | M2 | T = 708 ± 47°C |
|
|
14R-1 (Piece 3B, 40-45 cm) | Grt rim + Pl rim + Bt + Ksp + Als + Qtz | P = 5.3 ± 1.4 kbar |
| Equilibria used for PT determinations N.1 and 2: | |||
| 23Grs + 6Mg-St + 48Qtz = 8Pyr + 69An + 12H2O | |||
| 75An + 6Mg-St = 8Pyr + 25Grs + 96Ky + 12H2O | |||
| 23Grs + 6Fe-St + 48Qtz = 8Alm + 69An + 12H2O | |||
| Pyr + 2Grs + 3East + 6Qtz = 6An + 3Phl | |||
| 2Grs + 3Alm + 3East + 6Qtz = 2Pyr + 6An + 3Ann | |||
| 12An + 3Phl + 4Na-Phl = 5Pyr + 4Grs + 4Ab + 3East + 4H2O | |||
| Equilibria used for PT determinations N.3 and 4: | |||
| Pyr + 2Grs + 3East + 6Qtz = 3Phl + 6An | |||
| 4Grs + 3Phl + 12Sil = Pyr + 3East + 12An | |||
| Phl + 6An = Pyr + 2Grs + Kfs + 3Sill + H2O (for PT determination 4) | |||
| 7Phl + 12An = 5Pyr + 4Grs + 3East + 4Ksp + 4H2O (for PT determination 3) | |||
| Na-Phl + 6An = Pyr + 2Grs + Ab + 3Sil + H2O | |||
| Ann + 6An = 2Grs + Alm + Kfs + 3Sil + H2O | |||
Note: Estimates made following the data set of Holland and Powell (1990), for XH20 = 1.0.