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Table 2.9 Analyses of analcite from various ultrapotassic volcanic complexes
SiO
2
FeO
a
Al
2
O
3
Fe
2
O
3
CaO
Na
2
O
K
2
O
BaO
H
2
O
Total
1
55.91
21.64
1.05
0.09
0.19
12.00
0.25
8.50
99.63
2
51.39
23.48
1.55
0.21
0.20
12.78
1.92
8.20
99.73
3
58.43
21.33
0.93
0.05
9.17
0.34
90.25
4
59.05
21.28
1.00
0.05
9.54
0.29
91.21
91.38
b
5
57.70
19.90
0.90
0.16
12.20
0.52
91.35
b
6
55.66
21.59
1.17
0.23
12.40
0.30
91.07
b
7
57.57
20.00
0.81
0.20
12.00
0.49
8
55.86
21.57
0.44
0.02
0.94
12.67
0.66
0.01
92.17
91.89
c
9
54.71
22.90
0.10
Trace
14.18
Trace
90.35
c
10
60.20
18.61
Trace
Trace
11.54
Trace
91.05
c
11
53.72
22.96
0.50
0.31
13.46
0.1
91.09
c
12
55.04
22.80
0.33
Trace
12.92
Trace
92.15
c
13
53.06
24.27
0.58
0.77
12.5
0.97
a
Where only FeO values are given, they indicate total FeO + Fe
2
O
3
contents
b
The remainder consists of water (slightly above 8 wt%) and minor amout of Rb
2
O, SrO and MnO (<1 wt%)
c
100 minus total denotes content of H
2
O.
1
2 Analcite phenocrysts from feldspathoidal rocks occurring at northeastern Azerbaijan (Comin-Chiaramonti et al. 1997)
-
3
4 Analcites from Smoky Butte lamproites, Montana (Mitchell et al. 1987)
-
5
7 Analcites from leucite and analcite-bearing minette from Collima, Mexico. Analysis 6 is from Luhr and Carmichael (1981), who also reported presence of
0.01 wt% BaO. Other analyses are from Karlsson and Calyton (1991)
8 Analcite from potassic ma
c lavas of the Bearpaw Mountains (Macdonald et al. 1992)
9
-
10 Analcite from Portobello (Wilkinson and Hensen 1994)
11
-
12 Analcite from Nombi (Wilkinson and Hensen 1994)
-
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