Table 2. Representative Cr-rich spinel analyses.
Leg, hole: | 38-338 | 152-917A | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Core, section: |
43-1 |
43-1 |
43-1 |
43-3 |
45-1 |
9R-1 |
9R-1 |
11R-4 |
11R-4 |
16R-4 |
16R-4 |
16R-4 |
18R-3 |
18R-3 |
19R-4 |
20R-1 |
55R-4 |
64R-1 |
92R-4 |
101R-4 |
101R-4 |
|
Sample (cm): |
102-107 |
102-107 |
102-107 |
117-121 |
117-121 |
5-10 |
5-10 |
45-50 |
45-50 |
39-44 |
39-44 |
39-44 |
102-107 |
102-107 |
38-43 |
9-14 |
22-27 |
75-80 |
57-64 |
35-40 |
35-40 |
|
Description: |
Inclusion core |
Inclusion rim |
Inclusion rim |
Inclusion rim |
Inclusion |
Ol edge |
Ol edge |
Inclusion core |
Inclusion |
Inclusion |
Inclusion |
Inclusion |
Inclusion |
Ol edge |
Ol edge |
Inclusion |
Inclusion rim |
Inclusion rim |
Inclusion |
Inclusion core |
Inclusion core |
|
Unit: |
1 |
1 |
1 |
1 |
2 |
7 |
7 |
13 |
13 |
21 |
21 |
21 |
25 |
25 |
31A |
31B |
60 |
68 |
87 |
92 |
92 |
|
Transect: |
A |
B |
C |
D |
E |
F |
F |
G |
H |
I |
J |
K |
||||||||||
Analysis number: |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
|
SiO2 |
0.08 |
0.02 |
0.05 |
0.09 |
0.06 |
0.11 |
0.10 |
0.05 |
0.05 |
0.05 |
0.06 |
0.06 |
0.04 |
0.03 |
0.07 |
0.08 |
0.06 |
0.16 |
0.07 |
0.11 |
0.06 |
|
TiO2 |
0.42 |
0.66 |
0.70 |
0.76 |
0.42 |
0.46 |
0.46 |
1.45 |
0.46 |
0.59 |
0.64 |
0.64 |
0.77 |
0.74 |
0.67 |
0.64 |
1.47 |
0.62 |
0.56 |
0.48 |
0.44 |
|
Al2O3 |
34.53 |
24.05 |
25.10 |
24.13 |
27.72 |
24.03 |
24.29 |
20.37 |
18.28 |
24.11 |
24.06 |
25.54 |
23.90 |
22.01 |
24.78 |
21.60 |
18.67 |
30.08 |
28.15 |
33.39 |
33.35 |
|
V2O3 |
0.16 |
0.23 |
0.19 |
0.20 |
0.17 |
0.10 |
0.13 |
0.58 |
0.09 |
0.13 |
0.13 |
0.16 |
0.15 |
0.15 |
0.17 |
0.12 |
0.27 |
0.17 |
0.18 |
0.17 |
0.15 |
|
Cr2O3 |
28.49 |
37.93 |
36.12 |
35.63 |
34.18 |
40.19 |
39.14 |
38.30 |
45.51 |
40.38 |
39.42 |
34.08 |
37.67 |
40.53 |
38.87 |
42.74 |
33.92 |
32.37 |
28.25 |
28.26 |
28.87 |
|
FeO |
19.74 |
21.76 |
22.94 |
23.87 |
21.41 |
22.02 |
22.19 |
25.60 |
23.23 |
18.52 |
18.88 |
20.55 |
23.94 |
22.95 |
20.18 |
19.24 |
32.26 |
20.82 |
31.48 |
21.34 |
21.17 |
|
MnO |
0.26 |
0.30 |
0.31 |
0.30 |
0.31 |
0.29 |
0.30 |
0.25 |
0.17 |
0.16 |
0.24 |
0.30 |
0.14 |
0.21 |
0.25 |
0.34 |
0.42 |
0.30 |
0.21 |
0.17 |
0.15 |
|
NiO |
0.14 |
0.13 |
0.13 |
0.08 |
0.09 |
0.22 |
0.16 |
0.22 |
0.12 |
0.28 |
0.20 |
0.21 |
0.16 |
0.18 |
0.27 |
0.21 |
0.17 |
0.15 |
0.13 |
0.22 |
0.21 |
|
ZnO |
0.09 |
0.09 |
0.07 |
0.07 |
0.02 |
0.05 |
0.09 |
0.08 |
0.03 |
0.05 |
0.03 |
0.04 |
0.05 |
0.07 |
0.06 |
0.09 |
0.11 |
0.03 |
0.15 |
0.04 |
0.06 |
|
MgO |
15.98 |
13.94 |
14.07 |
13.48 |
14.45 |
12.95 |
12.97 |
12.25 |
11.86 |
15.63 |
15.53 |
15.59 |
13.15 |
13.02 |
14.56 |
15.00 |
10.72 |
13.98 |
10.33 |
15.59 |
15.61 |
|
CaO |
0.36 |
0.10 |
0.12 |
0.10 |
0.07 |
0.03 |
0.02 |
0.00 |
0.01 |
0.01 |
0.01 |
0.02 |
0.00 |
0.02 |
0.01 |
0.02 |
0.07 |
1.00 |
0.03 |
0.03 |
0.04 |
|
Total |
100.24 |
99.21 |
99.80 |
98.70 |
98.91 |
100.46 |
99.84 |
99.17 |
99.83 |
99.91 |
99.21 |
97.19 |
99.97 |
99.91 |
99.89 |
100.07 |
98.15 |
99.68 |
99.54 |
99.81 |
100.12 |
|
Fe2O3 |
7.66 |
8.15 |
9.19 |
9.60 |
8.15 |
6.40 |
6.76 |
9.26 |
6.88 |
7.07 |
7.47 |
9.92 |
8.52 |
7.77 |
6.96 |
7.25 |
14.84 |
6.96 |
11.82 |
8.49 |
8.38 |
|
FeO |
12.85 |
14.42 |
14.66 |
15.23 |
14.08 |
16.26 |
16.11 |
17.27 |
17.04 |
12.16 |
12.16 |
11.62 |
16.27 |
15.96 |
13.91 |
12.71 |
18.91 |
14.56 |
20.85 |
13.70 |
13.63 |
|
Total |
101.01 |
100.03 |
100.72 |
99.66 |
99.73 |
101.10 |
100.52 |
100.09 |
100.52 |
100.62 |
99.96 |
98.19 |
100.82 |
100.68 |
100.59 |
100.80 |
99.63 |
100.37 |
100.72 |
100.66 |
100.96 |
|
Cr/(Cr + Al) |
0.356 |
0.514 |
0.491 |
0.498 |
0.453 |
0.529 |
0.519 |
0.558 |
0.625 |
0.529 |
0.523 |
0.472 |
0.514 |
0.553 |
0.513 |
0.570 |
0.549 |
0.419 |
0.402 |
0.362 |
0.367 |
|
Cr/(Cr + Al + Fe3+) |
0.326 |
0.465 |
0.439 |
0.441 |
0.410 |
0.489 |
0.478 |
0.494 |
0.574 |
0.486 |
0.478 |
0.418 |
0.463 |
0.502 |
0.471 |
0.522 |
0.447 |
0.386 |
0.347 |
0.328 |
0.333 |
|
Mg/(Mg + Fe) |
0.689 |
0.633 |
0.631 |
0.612 |
0.646 |
0.587 |
0.589 |
0.558 |
0.554 |
0.696 |
0.695 |
0.705 |
0.590 |
0.592 |
0.651 |
0.678 |
0.503 |
0.631 |
0.469 |
0.670 |
0.671 |
|
Fe3+/(Cr + A l + Fe3+) |
0.084 |
0.095 |
0.106 |
0.113 |
0.093 |
0.074 |
0.079 |
0.114 |
0.083 |
0.081 |
0.086 |
0.116 |
0.100 |
0.092 |
0.080 |
0.084 |
0.186 |
0.079 |
0.138 |
0.094 |
0.092 |
|
Melt Mg/(Mg + Fe) |
0.636 |
0.636 |
0.631 |
0.616 |
0.627 |
0.588 |
0.588 |
0.586 |
0.593 |
0.700 |
0.698 |
0.701 |
0.596 |
0.609 |
0.649 |
0.696 |
0.552 |
0.596 |
0.448 |
0.621 |
0.623 |
Note: FeO and Fe2O3 recalculated after Carmichael (1967).