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

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Latitude & Longitude (WGS84): 71° 3' 13'' North , 116° 34' 16'' East
Latitude & Longitude (decimal): 71.05361,116.57111
Other regions containing this locality:Soviet Union (1922-1991)
Köppen climate type:Dfd : Extremely cold subarctic climate
Name(s) in local language(s):массив Томтор


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.


Mineral List


46 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Cisuralian
272.3 - 298.9 Ma



ID: 651205
Sedimentary; Clastic: continental

Age: Cisuralian (272.3 - 298.9 Ma)

Description: West Siberian Basin, Siberian Platform, Anabar-Olenek uplift

Comments: Craton cover; Petrov et al., unpublished compilation, 2007-08

Lithology: Redbeds, quartz arenite, arkose, conglomerate, evaporites;

Reference: J.C. Harrison, M.R. St-Onge, O.V. Petrov, S.I. Strelnikov, B.G. Lopatin, F.H. Wilson, S. Tella, D. Paul, T. Lynds, S.P. Shokalsky, C.K. Hults, S. Bergman, H.F. Jepsen, and A. Solli. Geological map of the Arctic. doi:10.4095/287868. Geological Survey of Canada Map 2159A. [2]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
- 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 and/or Locality  
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