Table T4. Shipboard major element analyses of dolerite by X-ray fluorescence.
Core, section,
interval (cm)SiO2
TiO2
Al2O3
Fe2O3
MnO
MgO
CaO
Na2O
K2O
P2O5
Total
LOI
Fe2O3/MgO
Upper unit
180-1109D-
46R-1, 104-106
51.56
1.45
14.51
12.74
0.19
6.14
12.68
1.73
0.12
0.12
101.2
1.55
2.08
50.84
1.43
14.48
12.74
0.19
6.10
12.60
1.74
0.11
0.11
100.3
1.55
2.09
47R-3, 104-107
51.24
1.43
14.58
12.72
0.18
6.30
12.69
1.76
0.08
0.12
101.1
1.25
2.02
51.39
1.38
14.64
12.63
0.18
6.36
12.54
1.68
0.08
0.11
101.0
1.25
1.99
48R-3, 98-100
51.41
1.33
14.57
12.43
0.19
6.84
12.40
1.65
0.11
0.11
101.4
1.26
1.82
51.01
1.33
14.45
12.45
0.19
6.84
12.34
1.62
0.11
0.11
100.4
1.26
1.82
49R-2, 103-106
50.74
1.31
15.53
12.08
0.19
6.99
12.74
1.63
0.10
0.11
101.1
2.01
1.73
50.72
1.31
15.55
12.20
0.19
7.02
12.43
1.68
0.10
0.10
101.3
2.01
1.74
50R-1, 10-12
51.04
1.31
14.75
12.50
0.19
7.00
12.24
1.60
0.09
0.10
100.8
1.64
1.79
51.21
1.30
14.88
12.53
0.18
7.03
12.32
1.58
0.09
0.10
101.2
1.64
1.78
51R-1, 48-51
51.48
1.33
14.81
12.43
0.19
7.49
12.09
1.55
0.11
0.10
101.6
1.74
1.66
51.53
1.33
14.78
12.33
0.18
7.54
12.10
1.58
0.11
0.10
101.6
1.74
1.64
Lower unit
180-1109D-
51R-4, 51-54
51.58
1.43
15.45
11.41
0.18
7.08
12.60
1.92
0.19
0.11
101.9
2.67
1.61
51.17
1.43
15.32
11.45
0.18
7.04
12.48
1.92
0.14
0.11
101.3
2.67
1.63
51.73
1.42
15.38
11.37
0.18
7.11
12.52
1.99
0.14
0.11
102.0
2.67
1.60
Notes: LOI = loss on ignition. All values are in weight percent.