Table
T7. Whole-rock compositions of six fine-grained bulk samples,
Hole 1184A.
192-1184A-
Core,
section:
18R-6
31R-1
36R-7
40R-3
42R-1
45R-6
Interval
(cm):
43-45
140-142
74-76
37-41
147-150
82-85
Subunit:
IIB
IID
IIE
IIE
IIE
IIE
Depth (mbsf):
266.13
385.81
441.74
474.67
492.17
526.94
Major
element (wt%):
SiO2
52.09
50.68
49.89
50.38
50.98
50.79
TiO2
1.14
1.23
1.33
1.02
1.03
1.09
Al2O3
13.84
13.71
13.57
14.34
14.33
14.59
Fe2O3T
13.03
13.51
14.61
11.60
11.96
12.41
MnO
0.20
0.23
0.25
0.19
0.20
0.25
MgO
9.96
6.29
6.93
8.37
8.37
7.75
CaO
2.24
7.80
8.05
11.76
11.42
10.74
Na2O
5.06
4.95
4.27
2.06
1.79
1.66
K2O
2.07
0.54
0.10
0.09
BD
0.10
P2O5
0.11
0.11
0.12
0.11
0.10
0.11
Total:
99.73
99.06
99.11
99.91
100.18
99.50
LOI
8.01
7.03
5.82
5.89
5.97
7.39
Mg#
0.63
0.51
0.52
0.62
0.61
0.58
CIPW
norms:
Q
0.0
0.0
0.0
0.2
2.5
3.9
Or
12.4
3.2
0.6
0.5
0.0
0.6
Ab
41.8
37.3
36.9
17.6
15.3
14.3
An
9.1
13.9
17.9
29.9
31.3
32.5
Ne
0.9†
3.0†
0.0
0.0
0.0
0.0
Di
1.2
20.6
18.3
23.1
20.6
17.1
Hy
0.0
0.0
3.1
24.2
25.9
26.9
Ol
29.8
16.8
17.6
0.0
0.0
0.0
Il
2.2
2.4
2.6
2.0
2.0
2.1
Mt
2.3
2.4
2.6
2.0
2.1
2.2
Ap
0.2
0.2
0.3
0.2
0.2
0.2
Trace
element (ppm):
Ni
82
81
79
106
118
114
Cr
110
147
129
314
293
310
V
334
343
379
303
315
330
Zr
61
67
76
54
58
60
Sc
49
50
51
48
46
51
Y
24
31
33
23
22
23
Sr
1142
108
104
97
95
87
Ba
36
16
29
19
18
22
Notes: Fe2O3T = total Fe expressed as Fe2O3. LOI = weight loss on ignition at 1100°C; all analyses were conducted on ignited samples. Mg# and CIPW norms were calculated assuming Fe2O3/(Fe2O3 + FeO) = 0.13 or Fe2O3/FeO = 0.15. † = the appearance of nepheline in the norm is due to alkali gain in these highly altered rocks. BD = below detection limit (0.01% is assumed for norm calculations). This table is also available in ASCII format.