Tomtor Massif, Polar Yakutia, Sakha Republic (Saha Republic; Yakutia), Eastern-Siberian Region, Russia
|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.
46 valid minerals.
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
272.3 - 298.9 Ma
|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Comments: Craton cover; Petrov et al., unpublished compilation, 2007-08
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.