Table
T7. Major and trace element data.
Leg,
hole,
core, section:183-1136A-15R-2,
183-1136A-16R-1,
183-1136A-16R-3,
183-1136A-17R-1,
183-1136A-18R-3,
183-1136A-18R-4,
Interval
(cm):
69-71
80-82
51-53
111-117
63-65
89-92
Piece:
1C
3E
4
15
2
2
Unit:
1
1
2
2
2
2
Rock
type:
Highly
altered basalt
Slightly
altered basalt
Slightly
altered basalt
Slightly
altered basalt
Slightly
altered basalt
Vesicle-rich
segregation
Depth
(mbsf):
128.89
138.40
141.07
145.01
150.61
151.68
Major
oxides (wt%):
SiO2
50.47
50.04
50.62
50.52
51.42
48.46
TiO2
1.74
1.60
1.76
1.71
1.68
3.43
Al2O3
15.35
15.84
15.26
15.23
14.77
11.94
Fe2O3*
14.26
12.13
12.83
12.12
12.06
20.33
MnO
0.07
0.13
0.12
0.16
0.19
0.36
MgO
4.77
6.40
6.65
6.69
6.59
4.46
CaO
7.59
9.00
7.92
9.38
9.02
6.41
Na2O
2.89
2.70
2.96
2.78
2.88
2.90
K2O
1.34
0.38
0.51
0.30
0.32
0.44
P2O5
0.19
0.16
0.21
0.19
0.19
0.45
Total
98.65
98.37
98.82
99.07
99.11
99.17
LOI
1.80
1.40
2.10
0.90
1.10
0.90
Mg#
0.44
0.55
0.55
0.56
0.56
0.34
Trace
elements (ppm):
Rb
33
6
8
5
4
14
Ba
61
70
75
86
106
67
Sr
234
237
294
248
244
205
Ce
6
13
17
15
14
8
Nb
6.3
6.5
6.9
7.6
7.3
13.4
Zr
103
95
116
110
112
208
Y
28
29
33
29
31
51
V
258
260
288
284
289
260
Cr
172
176
155
156
142
2
Ni
70
66
66
61
59
26
Cu
27
138
106
127
113
212
Zn
132
100
104
98
101
152
Notes: * = total iron as Fe2O3. LOI = loss on ignition at 1025°C for 4 hr. Mg# = MgO/(MgO + FeO), mol%, with FeO calculated (as 80% of total Fe).