Earth:Sylvinite

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Short description: A sedimentary rock made of a mechanical mixture of sylvite and halite
Sylvinite from Perm Krai, Russia
Close-up view of sylvinite from Perm, Russia

Sylvinite is a sedimentary rock made of a mechanical mixture of the minerals sylvite (KCl, or potassium chloride) and halite (NaCl, or sodium chloride).[1][2] Sylvinite is the most important source for the production of potash in North America, Russia and the United Kingdom .[2][3] Most Canada operations mine sylvinite with proportions of approximately 31% KCl and 66% NaCl with the balance being insoluble clays, anhydrite and in some locations carnallite. Other deposits of sylvinite are located in Belarus , Brazil , France , Germany , Kazakhstan, Slovakia and Spain .[4]

References

  1. Wardlaw, Norman C. (1968). "Carnallite-Sylvite Relationships in the Middle Devonian Prairie Evaporite Formation, Saskatchewan". Geological Society of America Bulletin 79 (10): 1273–1294. doi:10.1130/0016-7606(1968)79[1273:CRITMD2.0.CO;2]. Bibcode1968GSAB...79.1273W. 
  2. 2.0 2.1 Weiss N.L., SME Mineral Processing Handbook 1985, Page 22-2
  3. "Potash". Mineral Planning Factsheet. British Geological Survey. 2011. http://www.bgs.ac.uk/downloads/start.cfm?id=1367. Retrieved 8 February 2017. 
  4. "Sylvinite". mindat.org. 29 December 2016. https://www.mindat.org/min-6360.html. Retrieved 8 February 2017.