Table T4.
Major element compositions of dolerite and metadolerite recovered, Sites 1108,
1109, 1111, and 1114.
Core,
section, interval (cm)
Sample
SiO2
Average
TiO2
Average
Al2O3
Average
Fe2O3
Average
MnO
Average
MgO
Average
180-1111A-
16R-CC, 8-15
1a
47.56
1.96
16.62
13.45
0.20
6.68
1b
47.32
47.44
1.94
1.95
16.55
16.59
13.50
13.47
0.20
0.20
6.64
6.66
180-1108B-
47R-CC, 1-3
2a
51.45
1.41
13.73
13.64
0.20
7.66
2b
51.51
51.48
1.41
1.41
13.75
13.74
13.57
13.61
0.20
0.20
7.69
7.67
180-1114A-
36R-2, 40-42
3a
51.21
1.53
14.46
13.96
0.20
7.61
3b
50.45
50.85
1.49
1.51
14.32
14.39
13.71
13.65
0.19
0.19
7.57
7.59
36R-1, 70-72
4a
53.20
1.41
14.32
13.53
0.22
7.28
4b
52.88
53.04
1.41
1.41
14.20
14.26
13.52
13.53
0.22
0.22
7.23
7.25
180-1109D
5
51.24
1.37
14.91
12.27
0.19
6.86
Sample
CaO
Average
Na2O
Average
K2O
Average
P2O5
Average
Total
Average
LOI
Average
FeO*/MgO
Rock
type
1a
12.69
1.32
0.57
0.18
101.24
4.10
Foliated,
epidote-rich schist
1b
12.60
12.65
1.27
1.29
0.57
0.57
0.18
0.18
100.76
101.00
4.10
4.10
1.82
2a
10.56
2.58
0.15
0.09
101.47
3.43
Pebble in sediments
2b
10.57
10.56
2.49
2.53
0.16
0.15
0.09
0.09
101.43
101.50
3.43
3.43
1.60
3a
11.21
1.85
0.39
0.13
102.46
2.53
Non-foliated
metadolerite
3b
11.03
11.12
1.90
1.87
0.39
0.39
0.12
0.13
101.16
102.90
2.53
2.53
1.62
4a
8.85
2.61
0.99
0.11
102.53
2.47
Foliated
metadolerite
pebble
4b
8.77
8.81
2.66
2.63
0.98
0.99
0.11
0.11
101.98
102.30
2.47
2.47
1.68
5
12.45
1.71
0.11
0.11
101.20
1.79
1.61Dolerite
Notes: Analyses are arranged in descending order of loss on ignition (LOI). FeO* = total Fe as FeO. Major element values are in weight percent. a and b = duplicate analyses of the same sample. 5 = average analysis of dolerite in Hole 1109D.