Dikes of alkaline picrites and carbonatites.
"Tul'ilukht bay" is probably in all cases the southward peninsula in Tullilikht bay, which consists mainly of foyaite rock. Most of carbonatites are only to be reached by boreholes through the sediment layers deposited by the Kaskasjunjok and Tuliok rivers.
Ref.:
- Ivanyuk, G.Y., Pakhomovsky, Y.A., Konopleva, N.G., Yakovenchuk, V.N., Men’shikov, Y.P., and Mikhailova, Y.A. (2007): Spinel-Group Minerals in Rocks of the Khibiny Alkaline Pluton, Kola Peninsula. Geology of Ore Deposits 49(7), 599-606.
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http://maurice.strahlen.org/kola/khibiny.htm
14 entries listed. 13 valid minerals.