Mindat Logo

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

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.

Ref.:
S.M. Kravchenko and B.G. Pokrovsky (1995): Economic Geology, 90, 676-689.





Mineral List:
Almandine
'Amphibole Group'
Anatase
Ankerite
Apatite-(CaF)
var: Francolite
Apatite-(CaOH)
Baryte
Braunite
Calcite
'Chlorite Group'
'Clinopyroxene Subgroup'
Columbite-(Fe)
Crandallite
var: Strontian Crandallite
Dolomite
Florencite-(Ce)
Forsterite
Galena
'Garnet Group'
Goethite
Gorceixite
Goyazite
Groutite
Gypsum
Harmotome
Hausmannite
Kaolinite
'K Feldspar'
Leucite
Magnesite
Magnetite
Manganite
Monazite-(Ce)
Montmorillonite
Natrolite
Phlogopite
var: Barium-Phlogopite
Pyrite
Pyrochlore
Pyrolusite
Rhabdophane-(Ce)
Rhodochrosite
Röntgenite-(Ce)
Rutile
var: Ilmenorutile
Siderite
var: Manganoan Siderite
Sphalerite
Strontiopyrochlore
Svanbergite
Tin
'Unnamed (HBU UK-1)'
Xenotime-(Y)


54 entries listed. 42 valid minerals.

The above list 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 page is currently not sponsored. Click here to find out how you can sponsor this page.


Mineral and/or Locality
Google
 
www.mindat.org Web
Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 22nd Nov 2009 23:54:46