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Tomtor Massif, Polar Yakutia, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia

Hydroxylapatite
Tomtor Massif, Polar Yakutia, Saha Republic, Eastern-Siberian Region, Russia

Photo: Pavel M. Kartashov
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

Aegirine
Almandine
'Amphibole Group'
Anatase
Ankerite
Baryte
Braunite
Calcite
'Chlorite Group'
'Clinopyroxene Subgroup'
Columbite-(Fe)
Crandallite
var: Strontian Crandallite
Dolomite
Florencite-(Ce)
Fluorapatite
var: Francolite
Forsterite
Galena
'Garnet'
Goethite
Gorceixite
Goyazite
Groutite
Gypsum
Harmotome
Hausmannite
Hydroxylapatite
Kaolinite
'K Feldspar'
Leucite
Limonite
Magnesite
Magnetite
Manganite
Monazite-(Ce)
Montmorillonite
Muscovite
var: Sericite

Natrolite
Phlogopite
var: Barium-Phlogopite
Pyrite
Pyrochlore Group
var: Strontiopyrochlore (of Hogarth 1977)
Pyrolusite
Rhabdophane-(Ce)
Rhodochrosite
Röntgenite-(Ce)
Rutile
var: Ilmenorutile
Siderite
var: Manganoan Siderite
Sphalerite
Svanbergite
Tin
'Unnamed (HBU UK-1)'
Xenotime-(Y)


57 entries listed. 43 valid minerals.

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Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 27th Jun 2011 19:47:30
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