stripes
Occurrence number:
136-13-011
Country:
Russia
Region:
Kuznetsk-Minusinsk
Location:
Longitude: 89.12, Latitude: 55.1
Carbonatite:
No
Intrusive sheets of nephelinite and phonolite are encountered within diabase nappes. The nephelinites contain abundant small nepheline phenocrysts in a groundmass composed of titanaugite, alkali amphibole, magnetite and apatite. In the phonolites the phenocrysts are alkali feldspar and albite. The groundmass has a trachytic texture and consists of thin laths of alkali feldspar, pseudomorphs after nepheline, aegirine and Fe-Ti oxide minerals. The chemical composition of the rocks can be found in Luchitsky (1960).
References:
LUCHITSKY, I.V. 1960. Volcanism and tectonics of Devonian depressions of the Minusinsk intermontane trough. Publishing House of the USSR Academy of Sciences, Moscow. 275 pp.
Location: