Alkaline Rocks and Carbonatites of the World

Setup during HiTech AlkCarb: an online database of alkaline rock and carbonatite occurrences

Kolbashinskii (Karabalty-Kol'Bashi)

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Occurrence number: 
086-00-001
Country: 
Kyrgyzstan
Location: 
Longitude: 73.73, Latitude: 42.33
Carbonatite: 
No

Kolbashinskii is a volcanic field situated in the Kirgiz shield of the northern Tyan-Shan west of lake Issyk-Kul. Leucite-bearing basaltoids form an east-west-trending zone 40-45 km long and 5 km wide. They comprise the so-called "Kolbashinskaya suite" that is divided into three series which, from the base upwards, consists of (1) leucite-bearing basaltoids, including leucite tephrites, (2) alkaline trachytes and (3) tuff-breccias and tuffs of peralkaline trachyte.

Age: 
K-Ar indicated 309-270 Ma (Bagdasarov et al., 1974).
References: 

BAGDASROV, E.A., ORLOVA, M.P. and KOZYREV, V.I. 1974. Rare and trace elements of alkaline gabbroids and basalts of the North Tyan-Shan. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva., 6: 682-94.
GORETSKAYA, E.I., UGLOV, S.M. and LESKOV, S.A. 1957. Materials on geology and metallogeny of South Gizzar. Doklady Akademii Nauk Tadzhikskoi SSR, 9: 68-72.

Location: 
All locations > Asia > Kyrgyzstan
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith