Alkaline Rocks and Carbonatites of the World

Funded by HiTech AlkCarb - New geomodels to explore deeper for Hi-Tech critical raw materials in Alkaline rocks and Carbonatites

Karaganskii

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Occurrence number: 
086-00-013
Country: 
Kyrgyzstan
Location: 
Longitude: 70, Latitude: 39.75

Karaganskii is a 6 km2 intrusion composed of nepheline and alkaline syenites which are commonly altered with extensive replacement by sodalite, cancrinite and liebenerite. Nepheline comprises about 30% of the rocks and accessories include zircon, garnet, apatite, monazite, anatase, tantalo-niobates and magnetite. There are dykes and veins of syenite aplite, albitite, peralkaline syenite pegmatite and lamprophyre.

Economic: 
There is a sulphide mineralisation of copper, lead, zinc, arsenic and molybdenum; concentrations of Nb, Ta and rare earth minerals are associated with the alkaline syenites.
Age: 
Late Palaeozoic - on geological evidence.
References: 
SHINKAREV, N.F. 1966. Upper Palaeozoic magmatism of Turkestan-Alay. Leningrad University Publishers, Leningrad. 152 pp.
Location: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith