Deposit I.
Microprobe analyses of glasses used as starting materials for garnet syntheses. The reported data refer to an average of 15 to 20 spot analysis. The number in parantheses give the standard deviations (1s ). The formulas are based on 12 O atoms and 8 cations.
|
Py85Gr15 G1* |
Py85Gr15 G2 |
Py85Gr15 G3 |
Py75Gr25 G1 |
Py75Gr25 G2 |
Py75Gr25 G3 |
|||||||
|
Weight percent |
||||||||||||
|
SiO2 |
44.04 |
(20) |
43.54 |
(7) |
44.19 |
(15) |
43.94 |
(25) |
43.72 |
(17) |
43.74 |
(23) |
|
Al2O3 |
24.87 |
(19) |
25.42 |
(10) |
24.86 |
(11) |
24.34 |
(20) |
24.65 |
(16) |
24.51 |
(12) |
|
FeO |
0.03 |
(3) |
0.01 |
(1) |
0.01 |
(1) |
0.09 |
(2) |
0.01 |
(1) |
0.0 |
(1) |
|
CaO |
6.34 |
(5) |
6.30 |
(8) |
6.38 |
(7) |
10.48 |
(1) |
10.37 |
(11) |
10.4 |
(8) |
|
MgO |
25.2 |
(18) |
25.14 |
(4) |
25.15 |
(8) |
22.01 |
(20) |
22.07 |
(10) |
21.99 |
(12) |
|
Total |
100.49 |
100.40 |
100.59 |
100.87 |
100.82 |
100.67 |
||||||
|
Cations |
||||||||||||
|
Si |
2.994 |
(6) |
2.962 |
(4) |
3.001 |
(6) |
3.014 |
(8) |
2.996 |
(8) |
3.003 |
(6) |
|
Al |
1.993 |
(6) |
2.038 |
(7) |
1.990 |
(6) |
1.968 |
(8) |
1.991 |
(8) |
1.983 |
(8) |
|
Fe |
0.002 |
(2) |
0.001 |
(1) |
0.001 |
0.001 |
(1) |
0.001 |
(1) |
0.001 |
(1) |
|
|
Ca |
0.462 |
(3) |
0.460 |
(6) |
0.464 |
(5) |
0.770 |
(2) |
0.762 |
(9) |
0.766 |
(6) |
|
Mg |
2.554 |
(5) |
2.549 |
(5) |
2.546 |
(7) |
2.250 |
(10) |
2.254 |
(6) |
2.25 |
(6) |
|
Total |
8.005 |
8.009 |
8.002 |
8.001 |
8.004 |
8.003 |
||||||
|
mol% Py |
84.686 |
(17) |
84.73 |
(16) |
84.58 |
(23) |
74.50 |
(32) |
74.74 |
(18) |
74.60 |
(21) |
|
mol% Gr |
15.314 |
(10) |
15.27 |
(19) |
15.42 |
(15) |
25.50 |
(8) |
25.25 |
(31) |
25.40 |
(15) |
|
*The numbers refer to the amount of meltings. G1 refers to a glass which was molten once, G2 was molten twice and G3 molten three times. |
||||||||||||
Deposit II
Microprobe analyses of synthetic pyrope-grossular garnets. The reported data refer to an average of 15 to 20 spot analyses. The number in parantheses give the standard deviations (1s ). The formulas are based on 12 O atoms and 8 cations.
|
Sample label |
B001# |
B003 |
B004 |
B005 |
B006 |
|||||
|
Weight percent |
||||||||||
|
SiO2 |
43.79 |
(40) |
44.02 |
(75) |
43.92 |
(34) |
44.64 |
(33) |
43.94 |
(28) |
|
Al2O3 |
24.44 |
(29) |
25.01 |
(106) |
24.87 |
(27) |
25.18 |
(42) |
25.19 |
(29) |
|
FeO |
0.02 |
(3) |
0.03 |
(3) |
0.01 |
(2) |
0.01 |
(2) |
0.02 |
(2) |
|
CaO |
10.82 |
(31) |
6.64 |
(37) |
6.47 |
(22) |
6.80 |
(70) |
10.49 |
(35) |
|
MgO |
22.20 |
(23) |
25.40 |
(33) |
25.26 |
(21) |
25.58 |
(59) |
22.57 |
(24) |
|
Total |
101.27 |
101.09 |
100.54 |
102.21 |
102.21 |
|||||
|
Cations |
||||||||||
|
Si |
2.995 |
(16) |
2.980 |
(46) |
2.988 |
(16) |
2.989 |
(20) |
2.974 |
(13) |
|
Al |
1.970 |
(24) |
2.000 |
(85) |
1.994 |
(23) |
1.987 |
(29) |
2.009 |
(19) |
|
Fe |
0.001 |
(2) |
0.000 |
(2) |
0.001 |
(1) |
0.001 |
(1) |
0.001 |
(1) |
|
Ca |
0.792 |
(21) |
0.480 |
(24) |
0.472 |
(16) |
0.477 |
(27) |
0.761 |
(25) |
|
Mg |
2.263 |
(19) |
2.560 |
(26) |
2.561 |
(16) |
2.571 |
(25) |
2.276 |
(24) |
|
Total |
8.021 |
8.020 |
8.015 |
8.025 |
8.021 |
|||||
|
mol% Py |
74.06 |
(61) |
84.18 |
(87) |
84.45 |
(52) |
84.35 |
(81) |
74.95 |
(79) |
|
mol% Gr |
25.94 |
(67) |
15.82 |
(79) |
15.55 |
(53) |
15.65 |
(87) |
25.05 |
(83) |
|
# The sample labels are identical to that in Table 1. |
||||||||||
Continued: Microprobe analyses of synthetic pyrope-grossular garnets. The reported data refer to an average of 15 to 20 spot analysis. The number in parantheses give the standard deviations (1s ). The formulas are based on 12 O atoms and 8 cations.
|
Sample label |
B007 |
B008 |
B009 |
B010 |
B012 |
|||||
|
Weight percent |
||||||||||
|
SiO2 |
42.86 |
(25) |
43.87 |
(25) |
44.67 |
(26) |
43.11 |
(20) |
43.01 |
(53) |
|
Al2O3 |
24.44 |
(24) |
25.25 |
(32) |
25.18 |
(17) |
24.78 |
(20) |
24.11 |
(44) |
|
FeO |
0.01 |
(1) |
0.02 |
(2) |
0.02 |
(2) |
0.01 |
(1) |
0.02 |
(2) |
|
CaO |
10.18 |
(24) |
6.32 |
(25) |
6.44 |
(14) |
6.22 |
(20) |
10.22 |
(23) |
|
MgO |
21.60 |
(18) |
25.56 |
(24) |
25.59 |
(18) |
24.40 |
(33) |
21.17 |
(36) |
|
Total |
99.09 |
101.01 |
101.89 |
98.51 |
98.53 |
|||||
|
Cations |
||||||||||
|
Si |
2.990 |
(13) |
2.970 |
(13) |
2.996 |
(10) |
2.989 |
(14) |
3.016 |
(13) |
|
Al |
2.009 |
(17) |
2.014 |
(16) |
1.990 |
(13) |
2.025 |
(14) |
1.992 |
(20) |
|
Fe |
0.001 |
(1) |
0.001 |
(1) |
0.001 |
(1) |
0.001 |
(1) |
0.001 |
(1) |
|
Ca |
0.761 |
(18) |
0.458 |
(19) |
0.463 |
(10) |
0.462 |
(15) |
0.768 |
(27) |
|
Mg |
2.245 |
(17) |
2.579 |
(16) |
2.558 |
(11) |
2.522 |
(28) |
2.211 |
(25) |
|
Total |
8.006 |
8.023 |
8.009 |
7.998 |
7.988 |
|||||
|
mol% Py |
74.69 |
(56) |
84.91 |
(54) |
84.67 |
(37) |
84.52 |
(94) |
74.22 |
(84) |
|
mol% Gr |
25.31 |
(58) |
15.09 |
(62) |
15.33 |
(34) |
15.48 |
(51) |
25.78 |
(91) |
Continued: Microprobe analyses of synthetic pyrope-grossular garnets. The reported data refer to an average of 15 to 20 spot analysis. The number in parantheses give the standard deviations (1s ). The formulas are based on 12 O atoms and 8 cations.
|
Sample label |
B015 |
B016 |
B018 |
B019 |
B020 |
|||||
|
Weight percent |
||||||||||
|
SiO2 |
42.72 |
(22) |
43.33 |
(40) |
43.25 |
(47) |
43.03 |
(76) |
42.93 |
(62) |
|
Al2O3 |
24.48 |
(25) |
24.29 |
(19) |
24.27 |
(43) |
24.27 |
(27) |
24.5 |
(64) |
|
FeO |
0.02 |
(2) |
0.01 |
(2) |
0.01 |
(2) |
0.02 |
(2) |
0.02 |
(2) |
|
CaO |
10.19 |
(7) |
5.98 |
(32) |
5.77 |
(36) |
6.15 |
(68) |
6.00 |
(44) |
|
MgO |
21.25 |
(10) |
24.92 |
(35) |
25.20 |
(33) |
24.69 |
(57) |
24.9 |
(52) |
|
Total |
98.66 |
98.54 |
98.50 |
98.16 |
98.34 |
|||||
|
Cations |
||||||||||
|
Si |
2.992 |
(13) |
3.003 |
(12) |
2.997 |
(33) |
2.996 |
(18) |
2.983 |
(41) |
|
Al |
2.020 |
(18) |
1.984 |
(20) |
1.982 |
(36) |
1.991 |
(23) |
2.006 |
(58) |
|
Fe |
0.001 |
(1) |
0.001 |
(1) |
0.001 |
(1) |
0.001 |
(1) |
0.001 |
(1) |
|
Ca |
0.765 |
(5) |
0.444 |
(29) |
0.429 |
(28) |
0.459 |
(30) |
0.447 |
(27) |
|
Mg |
2.219 |
(13) |
2.574 |
(24) |
2.603 |
(29) |
2.562 |
(31) |
2.578 |
(29) |
|
Total |
7.997 |
8.005 |
8.011 |
8.009 |
8.014 |
|||||
|
mol% Py |
74.36 |
(44) |
85.29 |
(81) |
85.86 |
(96) |
84.81 |
(103) |
85.23 |
(95) |
|
mol% Gr |
25.64 |
(16) |
14.71 |
(96) |
14.14 |
(92) |
15.19 |
(99) |
14.77 |
(90) |