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Table 2.3 Analyses of plagioclase from different leucite-bearing localities
SiO 2
FeO t a
Al 2 O 3
BaO
SrO
MnO
CaO
Na 2 O 2 O
Total
An
Ab
Srf
1
45.47
34.39
0.69
0.76
17.41
1.60
0.29
100.61
2
55.34
28.30
0.34
0.08
9.80
5.62
0.80
100.28
3
55.40
28.60
0.55
9.95
5.21
0.87
100.58
4
47.70
33.00
0.69
0.09
16.80
1.75
0.47
99.50
5
53.50
28.40
0.60
12.30
4.10
0.83
99.73
6
45.80
34.00
0.74
0.06
18.40
1.23
0.11
100.34
7
46.10
33.00
0.75
18.30
1.63
0.14
99.92
8
46.68
33.53
0.54
1.04
16.21
1.76
0.13
80.60
15.80
2.80
99.89
9
48.58
32.18
0.68
0.90
14.85
2.51
0.15
74.00
22.60
2.40
99.85
a FeO t represents total FeO + Fe 2 O 3 contents
1
2 Plagioclases from leucite tuffs, Roccamon na (Luhr and Giannetti 1987)
-
3
5 Plagioclases from leucite tuffs, Latera Caldera (Turbeville 1993)
-
6
7 Pl agioclases from leucite tephrites Vico lavas (Cundari 1975)
-
8
9 Plagioclases from Mt. Vulture volcanic complex, Italy (Melluso et al. 1996)
-
 
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