Table
T8. Geochemical data for whole-rock samples analyzed by shipboard
ICP-AES, Hole 1186A.
192-1186A-
Core,
section:
30R-1*
31R-1*
31R-4*
33R-1
34R-4
37R-1
39R-4
Piece:
4
3A
1B
4F
9B
5B
4D
Interval
(cm):
59-62
11-13
55-56
91-93
122-125
114-118
101-104
Unit/Subunit:
1
1
1
2B
3
4
4
Depth (mbsf):
968.82
970.11
974.41
981.91
991.41
1015.94
1029.36
Major
element (wt%):
SiO2
50.60
50.30
51.20
49.20
50.80
49.60
50.00
TiO2
1.12
1.17
1.20
1.06
1.07
1.09
1.06
Al2O3
15.00
15.10
15.50
13.90
14.30
15.30
14.10
Fe2O3T
10.90
10.20
9.10
12.20
11.50
10.70
12.20
MnO
0.15
0.20
0.17
0.21
0.27
0.21
0.21
MgO
7.25
8.10
8.35
7.61
7.18
7.04
8.02
CaO
11.30
12.00
11.60
11.70
11.60
12.80
11.70
Na2O
2.34
2.30
2.47
2.06
2.17
2.26
2.17
K2O
0.61
0.02
0.05
0.09
0.40
0.12
0.05
P2O5
0.06
0.05
0.05
0.06
0.07
0.07
0.06
Total:
99.33
99.44
99.69
98.09
99.36
99.19
99.57
Mg#
0.60
0.64
0.67
0.58
0.58
0.60
0.60
LOI
1.43
1.39
2.11
0.38
0.58
1.10
1.00
CIPW
norms:
Q
0.0
0.0
0.2
0.1
0.9
0.0
0.0
Or
3.7
0.1
0.3
0.5
2.4
0.7
0.3
Ab
20.1
19.7
21.2
17.9
18.7
19.4
18.6
An
29.1
31.2
31.4
29.3
28.6
31.8
29.1
Di
22.4
23.4
21.3
24.7
24.2
26.5
23.9
Hy
19.4
20.5
21.5
22.9
20.8
14.9
23.0
Ol
1.0
0.7
0.0
0.0
0.0
2.3
0.6
Il
2.2
2.3
2.3
2.1
2.1
2.1
2.1
Mt
1.9
1.8
1.6
2.2
2.0
1.9
2.2
Ap
0.1
0.1
0.1
0.1
0.1
0.2
0.1
Trace
element (ppm):
Ni
110
125
113
100
103
110
108
Cr
189
197
203
179
188
207
191
V
311
341
356
302
307
315
306
Zr
61
65
66
53
53
58
54
Sc
49
55
55
48
46
50
49
Y
26
22.
22
24
23
21
23
Sr
131
130
140
108
111
121
106
Ba
16
12
10
14
12
10
12
Notes: * = analyses conducted on unignited samples. Fe2O3T = total Fe expressed as Fe2O3. LOI = weight loss on ignition at 1100ºC. Mg# is atomic Mg/(Mg + Fe+2). Mg# and CIPW norms were calculated assuming 12% of the total iron is Fe3+, which is equivalent to Fe2O3/(Fe2O3 + FeO) = 0.13, or Fe2O3/FeO = 0.15. This table is also available in ASCII format.