Table
T16. Major element oxides with selected trace elements by ICP-AES,
Hole 1188F.
Ignited
rock powder composition*: Ignited
rock powder composition*:
Major element
oxides (wt%):
SiO2
72.99
81.03
74.28
73.17
69.16
76.63
77.92
71.90
68.61
68.11
74.86
69.97
69.21
76.72
70.06
69.70
66.88
65.56
69.20
73.10
TiO2
0.65
0.65
0.64
0.64
0.60
0.63
0.63
0.64
0.73
0.65
0.61
0.76
0.71
0.54
0.67
0.70
0.75
0.70
0.65
0.67
Al2O3
14.74
13.78
14.73
14.48
15.09
15.36
15.28
15.73
14.83
15.49
15.11
15.12
14.79
14.61
17.68
14.36
15.17
15.05
16.57
14.79
Fe2O3
3.66
2.21
3.11
3.38
8.23
0.29
0.20
2.72
6.98
7.17
0.41
5.16
5.77
4.68
6.11
8.74
6.91
6.32
5.23
5.09
MnO
0.01
0.01
0.01
0.01
0.04
0.01
0.01
0.02
0.02
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.04
0.05
0.04
0.01
MgO
1.06
0.34
0.87
1.67
3.20
0.09
0.13
3.89
3.93
0.49
0.19
0.35
1.77
0.08
0.11
0.18
3.50
3.51
2.46
1.64
CaO
2.13
1.02
1.61
1.06
0.23
4.34
3.78
1.72
2.25
4.31
4.87
4.62
3.24
0.36
BD
3.37
3.34
3.24
1.18
2.37
Na2O
0.72
0.75
0.85
0.68
0.62
0.83
0.84
0.66
0.61
1.02
0.99
0.80
0.69
0.83
0.94
0.98
3.45
2.62
2.70
0.57
K2O
2.89
2.34
2.29
2.29
2.06
1.55
1.39
2.13
1.26
2.23
1.54
2.28
1.46
2.11
2.41
1.85
0.63
0.93
1.71
2.55
P2O5
0.13
0.11
0.14
0.15
0.17
0.15
0.16
0.16
0.31
0.14
0.15
0.29
0.28
0.10
0.07
0.26
0.37
0.30
0.17
0.02
Total (wt%):
98.97
102.23
98.52
97.54
99.42
99.89
100.34
99.56
99.52
99.63
98.73
99.35
97.94
100.02
98.06
100.15
101.04
98.29
99.91
100.82
LOI (wt%):
6.16
4.45
5.87
5.77
5.01
7.49
7.28
5.98
8.55
11.06
8.81
16.23
9.16
4.52
5.77
10.42
5.38
4.64
3.11
7.36
Trace
elements (ppm):
Zr
138
143
131
134
127
131
126
131
122
133
131
124
124
141
177
117
122
112
171
126
Y
38
14
41
48
37
37
37
42
34
50
49
37
34
16
21
31
33
32
35
43
Sr
185
86
125
84
53
674
663
148
185
362
487
466
295
89
70
291
335
285
238
172
Zn
1
BD
BD
BD
24
BD
48
BD
2
BD
BD
BD
1
39
BD
12
14
14
43
6
Cu
49
22
56
24
8
4
8
15
83
32
9
45
23
52
87
67
9
4
30
15
Ba
1417
1332
1054
1096
1048
966
812
1147
450
1309
769
717
492
1003
1427
535
287
318
935
1231
Whole
rock composition:
Major
element oxides (wt%):
SiO2
68.50
77.43
69.92
68.95
65.70
70.89
72.24
67.60
62.74
60.58
68.27
58.61
62.87
73.25
66.01
62.44
63.28
62.52
67.05
67.72
TiO2
0.61
0.62
0.60
0.60
0.57
0.58
0.58
0.60
0.67
0.58
0.55
0.64
0.64
0.52
0.63
0.63
0.71
0.67
0.63
0.62
Al2O3
13.83
13.17
13.86
13.65
14.34
14.21
14.17
14.79
13.57
13.78
13.78
12.67
13.43
13.95
16.66
12.86
14.35
14.35
16.06
13.70
Fe2O3
3.43
2.11
2.93
3.19
7.82
0.27
0.19
2.55
6.38
6.37
0.37
4.32
5.24
4.47
5.76
7.83
6.54
6.03
5.07
4.71
MnO
0.01
0.01
0.01
0.01
0.04
0.01
0.01
0.02
0.02
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.03
0.05
0.04
0.01
MgO
0.99
0.33
0.82
1.57
3.04
0.08
0.12
3.65
3.60
0.44
0.17
0.29
1.61
0.07
0.10
0.16
3.31
3.35
2.38
1.52
CaO
2.00
0.97
1.51
1.00
0.22
4.02
3.51
1.61
2.06
3.83
4.44
3.87
2.94
0.34
BD
3.01
3.16
3.09
1.14
2.20
Na2O
0.67
0.71
0.80
0.64
0.59
0.77
0.78
0.62
0.56
0.91
0.90
0.67
0.63
0.79
0.88
0.88
3.26
2.50
2.62
0.53
K2O
2.71
2.23
2.16
2.16
1.96
1.43
1.29
2.00
1.15
1.99
1.40
1.91
1.33
2.02
2.27
1.66
0.59
0.89
1.65
2.36
P2O5
0.12
0.10
0.13
0.14
0.17
0.14
0.14
0.15
0.28
0.12
0.13
0.24
0.25
0.09
0.07
0.23
0.35
0.29
0.16
0.02
Total S (wt%):
3.43
2.14
3.40
3.23
2.79
1.31
1.57
1.86
6.47
7.71
2.31
5.57
6.82
3.61
5.54
8.25
4.07
2.05
0.78
0.49
Total H2O+
(wt%):
2.50
2.18
2.74
3.11
3.81
2.33
2.36
3.62
4.03
2.51
2.24
2.26
3.13
2.13
2.77
2.15
2.55
2.61
2.83
1.44
Swater-soluble
sulfate (wt%):
0.99
0.55
0.77
0.54
0.05
1.34
1.51
0.66
0.97
0.96
1.80
1.61
ND
0.24
0.04
1.48
0.50
0.58
ND
0.88
Major
element oxides (wt%):
SiO2
67.09
74.05
68.95
69.19
72.53
66.70
73.01
71.81
69.56
73.78
67.70
TiO2
0.66
0.70
0.66
0.76
0.85
0.78
0.48
0.55
0.73
0.56
0.75
Al2O3
14.50
14.63
14.20
14.98
15.12
14.78
14.25
14.41
15.20
15.08
15.28
Fe2O3
6.85
4.10
7.37
5.47
4.46
7.49
5.61
6.05
6.81
5.05
6.71
MnO
0.03
0.01
0.03
0.05
0.03
0.13
0.03
0.04
0.04
0.05
0.09
MgO
3.25
0.19
2.59
2.47
5.22
3.20
1.72
1.82
4.89
1.72
2.27
CaO
2.84
3.88
2.21
3.38
1.76
3.17
1.17
2.42
1.69
1.99
3.26
Na2O
3.16
1.11
3.78
3.67
0.78
3.55
0.61
2.77
0.64
3.17
3.92
K2O
0.82
2.01
0.68
0.52
1.84
0.29
3.15
1.68
2.23
1.26
0.17
P2O5
0.05
BD
0.04
0.04
0.04
0.06
0.02
0.01
0.02
0.02
0.02
Total (wt%):
99.25
100.68
100.51
100.54
102.63
100.14
100.06
101.55
101.79
102.67
100.16
LOI (wt%):
5.44
7.85
3.36
3.66
5.46
3.22
5.19
5.10
7.11
3.32
2.12
Trace elements
(ppm):
Zr
121
126
121
115
115
115
146
141
125
148
121
Y
34
37
33
33
34
34
38
35
32
32
33
Sr
291
309
292
353
121
327
117
257
164
244
372
Zn
15
1
19
14
11
42
90
63
27
34
29
Cu
10
17
11
26
16
30
20
22
14
25
29
Ba
248
319
220
228
390
159
634
354
427
314
242
Whole rock composition:
Major
element oxides (wt%):
SiO2
63.44
68.24
66.63
66.66
68.57
64.55
69.23
68.15
64.61
71.33
66.26
TiO2
0.63
0.65
0.64
0.74
0.80
0.75
0.46
0.52
0.67
0.54
0.74
Al2O3
13.71
13.49
13.72
14.43
14.30
14.30
13.51
13.68
14.11
14.58
14.95
Fe2O3
6.48
3.78
7.12
5.27
4.22
7.25
5.32
5.74
6.32
4.89
6.56
MnO
0.03
0.01
0.03
0.05
0.03
0.13
0.03
0.03
0.04
0.04
0.09
MgO
3.07
0.18
2.50
2.38
4.93
3.10
1.63
1.72
4.55
1.67
2.22
CaO
2.69
3.58
2.14
3.26
1.66
3.07
1.11
2.30
1.57
1.93
3.19
Na2O
2.99
1.02
3.66
3.54
0.74
3.43
0.58
2.63
0.59
3.06
3.84
K2O
0.77
1.85
0.66
0.50
1.74
0.28
2.99
1.59
2.07
1.22
0.17
P2O5
0.04
BD
0.04
0.04
0.04
0.06
0.02
0.01
0.01
0.02
0.02
Total S (wt%):
5.03
5.45
4.28
2.85
1.82
1.69
4.28
4.97
4.48
2.81
0.71
Total H2O+
(wt%):
2.08
2.10
1.60
1.67
4.47
2.06
2.34
1.91
4.09
1.67
1.51
Swater-soluble
sulfate (wt%):
0.54
1.28
0.09
0.43
0.52
0.36
0.49
0.56
0.75
0.27
0.04
Notes: Rock type: AD = altered dacite, BR = breccia, GD = green dacite. Alteration type: Sil = silicified, GSG = green silica-clay. * = ignited for 6 hr at 600°C and then for 4 hr at 1050°C. LOI = loss on ignition. Total sulfur and post-LOI for the ICP-AES samples are reported. LOI was conducted at 1050°C for 4 hr. BD = below detection, ND = not determined, NCD = no curated depth.