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Vuoriyarvi alkaline-ultrabasic massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

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Belkovite : Ba3(Nb,Ti)6[O6|Si2O7]2, Dolomite : CaMg(CO3)2, Clinochlore : (Mg,Fe2+)5Al[(OH)8|AlSi3O10]

Vuoriyarvi alkaline-ultrabasic massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

~1 mm agregate of brownish belkovite crystals in a cavity of dolomite carbonatite. Not more then dozen specimens of this rare specie in such quality are known now. Author's specimen. Pavel M. Kartashov collection (#3274) and photo.
 © Pavel M. KartashovPhoto ID: 107199    View Count: 222

Belkovite : Ba3(Nb,Ti)6[O6|Si2O7]2

Vuoriyarvi alkaline-ultrabasic massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Submillimetric aggregates of brown fan-like crystals on matrix.
 © sandro maggiaPhoto ID: 83107    View Count: 274

Multiple photos availableCalcioburbankite : Na3(Ca,REE,Sr)3(CO3)5

Vuoriyarvi alkaline-ultrabasic massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Brown granular masses of calcioburbankite in later dolomite-calcite veinlet within coarse-granular phlogopite-calcite carbonatite. Associated minerals are calcite, dolomite, phlogopite, pyrite, unidentified chlorite, magnetite. Specimen size is 7x4x4 cm. Collected by S.V. Sokolov. Pavel M. Kartashov collection and photo.
 © Pavel M. KartashovPhoto ID: 203081    View Count: 59
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