Latitude: 71°3'13"N
Longitude: 116°34'16"E
Carbonitized K-rich lamproites (volcanic ring complex in a subsidence caldera related to an upper mantle plume and triple junction of upper mantle convection boundaries).
Complex structure with three distinct zones :
- Pyrochlore carbonatites
- Lower ore zone: metasomatically carbonatized volcanites enriched in REE, Nb, Y and Sc)
- Upper ore zone: placer deposit affected by hydrothermal alteration
Presence of kamafugite dikes and pipes.
Scandium exists in a distinct phase : Sc(OH)3 film on phosphates.
References
- Kravchenko, S.M., and Pokrovsky, B.G. (1995): Economic Geology, 90, 676-689.
- Berger, V.I., Singer, D.A., and Orris, G.J. (2009): Carbonatites of the World. Explored Deposits of Nb and REE - Database and Grade and Tonnage Models. USGS Open-File Report 09-1139.
Mineral List
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