Mineralogy - Origin of Potassium-rich Silica-deficient Igneous Rocks - page 51

Table 2.10 (continued)
NaMel Gehlen Ak NaFe

6 32.80 12.50 54.70
7 29.90 13.20 56.90
8 24.80 2.50 72.70
9 27.00 3.90 69.10
10 32.00 2.10 65.90
11 39.50 45.70 14.80
12 41.50 36.60 21.80
13 46.10 32.10 21.90
a Where only FeO values are given, they indicate total FeO + Fe 2 O 3 contents
1 Leucite-melilite-nephelinite volcano, Zaire (Sahama 1974)
2 Melilite from a K-rich olivine melilitite occurring at Capo de Bove, Italy (Buddington 1922)
3 Melilite from a K-rich rocks of Nyiragongo (Sahama and Meyer 1958)
4 Melilite from a K-rich melilite nephlinite lava from Roman province (Washington 1927)
5 Melilite from K-rich rocks of Monte Soma (Buddington 1922). Also contains 0.13 wt% H 2 O
6 13 Melilites from Mt. Vulture volcanics (Melluso et al. 1996)

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