Geology Reference
In-Depth Information
Table 2.13 (continued)
SiO
2
FeO
a
FeO
t
TiO
2
Al
2
O
3
Cr
2
O
3
P
2
O
5
MgO
MnO
CaO
Na
2
O
2
O
ZrO
2
ZnO
Total
Fe
2
O
3
21
29.34
55.78
9.80
1.03
2.00
0.79
98.74
13.32
17.35
22
15.31
63.00
13.80
2.14
4.16
0.48
0.2
99.09
2.97
12.64
23
47.95
36.22
3.30
5.70
1.87
0.86
95.90
19.27
30.61
a
Where only a few values are given, they indicate total FeO + Fe
2
O
3
contents
1 Magnetite from a nepheline and leucite-bearing tephrite, Laacher See, Germany (Duda and Schminke 1978)
2 Magnetite from a leucite basanite, Laacher See, Germany (Duda and Schminke 1978)
3 Magnetite from a leucite tephrite, Laacher See (Duda and Schminke 1978)
4 Magnetite from a phonotephrite, Alban Hills, Italy (Aurisicchio et al. 1988)
5
-
7 Magnetite from lamproites of Sierra Nevada (van Kooten 1980)
8
-
9 Pleonastes from a leucite lamproite (Fitzroy, Western Australia), Jaques and Foley 1985)
10 Titanomagnetite from a leucite phonololite from Vulsini lava, Italy (Francalanci et al. 1987)
11
-
13 Titanomagnetites from a Leucitic tuff, Roccamonna, Italy (Luhr and Giannetti 1987)
14
-
15 Magnesiochromites from an olivine orendite, South Table Mountain Leucite Hills (Kuehner et al. 1981)
16 Pleonaste from a wyomingite, Deer Butte, Leucite Hills (Kuehner et al. 1981)
17 Hercynite, aggregate in a leucite lamproites from Fitzroy, Western Australia (Jaques and Foley 1985)
18 Titanferous magnesiochromite from a lamproite, Fitzroy, Western Australia (Jaques and Foley 1985)
19
21 Representative microprobe analyses of chrome spinel from a Cancsrix lamproite, Albacete Spain (Wagner and Velde 1986)
22 Representative microprobe analyses of chromian spinel from a Sisco lamproite, Corsica. (Wagner and Velde 1986)
23 Representative microprobe analyses of chrome spinel from an Orciatico lamproite, Pisam, Italy (Wagner and Velde 1986)
-
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