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Janchivlan complex, Janchivlan, Nailakh Soum, Töv Aimag, Mongolia

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Multistage granitic pluton with an outcrop area of about 1000 km2, intruded into a Devonian-Carboniferous accretionary complex and Cambrian metasedimentary sequences. The first stages consist of two-mica granites and alaskites which are preserved in the core of the pluton. The late stages include miarolitic pegmatites, tin greisens and Li-F granites which crystallized from highly differentiated Sn-Ta-Nb-Li-rich magmas. All of the different granitoids contain tantalum, niobium and REE-bearing accessory minerals in varying proportions.

Mineral List

Mineral list contains entries from the region specified including sub-localities


38 entries listed. 25 valid minerals.

Localities in this Region

Mongolia

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 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

- Tumenbayar, B., Batbayar, M., and Grayson, R. (2000): Tantalite-Cassiterite-Ilmenite-Monazite-Gold Placers in Mongolia (Ta, Nb, Sn, Ti, REEs, Au). World Placer Journal 1, 160-174.

 
Mineral and/or Locality  
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