Table T9.
Chemical composition of glass shards and groundmass of volcanic clasts.
Northern margin
Footwall
Sample:
180-1118A-68R-3, 24-28 cm
180-1108B-3R-1, 41-44.5 cm
180-1114A-28R-CC, 3-5 cm
180-1116A-6R-1, 37-39 cm
Phenocrysts:
Bt, Plg (An13), Hbl, Kf (Or62)
Plg (An13), Hbl
Plg (An48-51)
Cpx, Plg (An43-50)
Plg (An11), Kf (Or94)
Plg (An45), Cpx
Plg (An51), Ilm
Microliths:
Plg (An46)
Plg (An46)
Plg (An40)
Major element oxide (wt%):
SiO2
76.80
77.21
69.12
61.19
52.37
55.53
53.27
51.97
50.78
54.46
58.12
63.84
TiO2
0.18
0.09
0.47
0.80
0.63
0.74
0.96
0.68
0.98
0.74
2.41
1.21
Cr2O3
0.42
0.22
2.46
0.87
1.18
0.57
0.60
0.84
0.98
0.60
3.57
0.30
Al2O3
13.49
13.64
10.03
17.62
8.95
5.69
7.22
11.71
12.75
7.19
10.63
14.13
Fe2O3
0.61
0.87
2.81
8.25
12.75
12.77
11.86
10.10
9.77
10.73
9.66
4.47
FeO
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
MnO
0.07
0.07
0.04
0.10
0.12
0.05
0.02
0.09
0.14
0.10
0.15
0.11
MgO
0.00
0.00
4.15
6.76
19.10
19.93
21.12
17.43
17.07
21.43
10.20
3.13
NiO
0.02
0.03
0.00
0.01
0.09
0.19
0.08
0.09
0.02
0.11
0.00
0.00
CaO
1.14
1.22
6.57
2.35
2.82
3.71
3.82
4.60
4.74
3.55
3.28
2.25
Na2O
2.46
1.86
3.04
0.66
0.90
0.53
0.43
0.44
0.46
0.50
0.77
3.95
K2O
4.80
4.79
1.32
1.38
1.09
0.28
0.63
2.05
2.30
0.57
1.22
6.61
Note: An = anorthite, Bt = biotite, Cpx = clinopyroxene, Hbl = hornblende, Ilm = ilmenite, Kf = K-feldspar, Or = orthoclase, Plg = plagioclase.