Geology Reference
In-Depth Information
Table 2.4 (continued)
FeO
t
a
SiO
2
TiO
2
Al
2
O
3
Cr
2
O
3
MnO
MgO
CaO
NiO
Na
2
O
2
O
Total
21
Core
54.28
1.69
0.22
0.38
3.18
17.83
22.10
99.68
22
Rim
54.01
2.18
0.25
3.92
17.53
22.10
99.99
23
53.00
0.92
0.52
0.56
4.30
0.12
16.70
23.30
0.06
0.39
99.87
24
Core
54.48
0.39
0.51
2.98
0.08
18.68
23.26
100.38
25
Rim
53.75
0.58
0.70
2.83
0.06
17.64
22.98
98.54
26
52.60
1.29
2.60
6.46
0.38
15.30
21.20
0.06
0.65
0.12
100.66
a
FeO
t
indicates total FeO + Fe
2
O
3
content. Analyses of 18, 19, 20 and 26 are those of certain grains
1
3 Pyroxene phenocrysts (No. 1) (analyses of core, mantle and rim) from a tephritic rock of Alban Hills (Aurisicchio et al. 1988)
-
4
6 Pyroxene phenocrysts (No. 2) (analyses of core, mantle and rim) from a tephritic rock of Alban Hills (Aurisicchio et al. 1988)
-
7
8 Pyroxene phenocrysts (No. 1) (analyses of core, mantle and rim) from a leucite tephrite, Vulsini, Italy (Barton et al. 1982)
-
9
11 Pyroxene phenocrysts (No 2) (analyses of core, mantle and rim) from a leucite tephrite, Vulsini, Italy (Barton et al. 1982)
12
-
14 Clinopyrexenes from Brown Leucitic Tuffs, Roccamon
na (Luhr and Giannetti 1987)
15
-
17 Clinopyroxenes from a phonolitic pumice clast, Latera Caldera, Italy (Turbeville 1993)
18 Core of a pyroxene phenocryst from an orendite obtained from North Table Mountain, Leucite Hills (Kuehner et al. 1981)
19 A pyroxene grain from a wyomingite obtained from Zirkel Mesa, Leucite Hills (Kuehner et al. 1981)
20 A pyroxene grain from a wyomingite obtained from Spring Butte, Leucite Hills (Kuehner et al. 1981)
21
-
22 Clinopyroxenes from a lamproite, Smoky Butte, U.S.A. (Mitchell et al. 1987)
23 A clinopyroxene grain from a leucitite, Gaussberg, Greenland (Sheraton and Cundari 1980)
24
-
25 Diopsidic pyorxenes form an ultrapotassic rock of Spain (Lopez Ruiz, Badiola 1980)
26 Clinopyroxene from an ultrapotassic rock of Sierra Nevada (van Kooten 1980)
-
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