Rock type:
|
Staurolite-bearing high-grade schist
|
Corundum-bearing schist
|
Biotite-rich schist
|
Gneiss
|
|||
---|---|---|---|---|---|---|---|
Sample:
|
161-976B-76R-1, 3-7 cm
|
976B-76R-1,
3-7 cm |
976B-76R-1,
45-49 cm |
976B-77R-2,
40-42 cm |
976B-77R-2,
40-42 cm |
976E-14R-1,
98-102 cm |
976B-98R-1,
96-101 cm |
Textural position:
|
Garnet I core
|
Garnet I rim
|
Garnet II
|
Core
|
Rim
|
Garnet II rim
|
Garnet II core
|
Analytic point:
|
E-17
|
E-3
|
B-104
|
F-58
|
F-72
|
A-54
|
104-4
|
SiO2 | 37.17 | 36.95 | 37.70 | 36.91 | 37.01 | 36.81 | 36.00 |
Al2O3 | 20.98 | 20.80 | 21.23 | 20.78 | 21.04 | 20.96 | 20.54 |
TiO2 | 0.22 | 0.10 | 0.07 | 0.28 | 0.05 | 0.06 | 0.10 |
MgO | 0.28 | 0.92 | 1.59 | 1.24 | 2.07 | 1.59 | 1.12 |
FeO | 28.32 | 35.52 | 34.46 | 25.04 | 28.16 | 35.70 | 36.58 |
MnO | 5.50 | 2.15 | 3.03 | 5.74 | 5.00 | 1.98 | 4.60 |
CaO | 8.26 | 4.05 | 3.73 | 10.72 | 6.53 | 3.05 | 1.20 |
Total | 100.73 | 100.49 | 101.81 | 100.71 | 99.86 | 100.15 | 100.14 |
Cations normalized to 12 oxygens (all Fe as Fe2+) | |||||||
Si | 2.983 | 2.992 | 2.998 | 2.955 | 2.967 | 2.983 | 2.946 |
Aliv | 0.017 | 0.008 | 0.002 | 0.045 | 0.033 | 0.017 | 0.054 |
Alvi | 1.969 | 1.978 | 1.989 | 1.916 | 1.956 | 1.985 | 1.927 |
Ti | 0.013 | 0.006 | 0.004 | 0.017 | 0.003 | 0.003 | 0.006 |
![]() |
1.982 | 1.984 | 1.993 | 1.933 | 1.959 | 1.988 | 1.933 |
Fe2+ | 1.903 | 2.408 | 2.292 | 1.616 | 1.894 | 2.422 | 2.516 |
Mg | 0.034 | 0.111 | 0.189 | 0.148 | 0.247 | 0.191 | 0.136 |
Mn | 0.374 | 0.147 | 0.204 | 0.389 | 0.340 | 0.136 | 0.319 |
Ca | 0.710 | 0.351 | 0.317 | 0.920 | 0.561 | 0.265 | 0.105 |
![]() |
3.021 | 3.017 | 3.002 | 3.073 | 3.042 | 3.014 | 3.076 |
Alm | 0.630 | 0.798 | 0.763 | 0.526 | 0.623 | 0.804 | 0.818 |
Grs | 0.235 | 0.116 | 0.106 | 0.299 | 0.184 | 0.088 | 0.034 |
Pyr | 0.011 | 0.037 | 0.063 | 0.048 | 0.081 | 0.064 | 0.044 |
Sps | 0.124 | 0.049 | 0.068 | 0.127 | 0.112 | 0.045 | 0.104 |
Fe/(Mg + Fe) | 0.983 | 0.956 | 0.924 | 0.916 | 0.885 | 0.927 | 0.949 |
Notes: End-member mole fractions are calculated as [Fe2+/ X] = Alm; [Ca/
X] = Grs; [Mg/
X] = Pyr; and [Mn/
X] = Sps; mineral abbreviations from Kretz (1983).