Alkaline Rocks and Carbonatites of the World

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Birdzhankol'Skii

stripes

Occurrence number: 
084-00-026
Country: 
Kazakhstan
Location: 
Longitude: 75.32, Latitude: 50.83

This small, 1 km2 intrusion is a stock-like body composed of peralkaline syenites and granosyenites with subordinate dykes of nepheline syenite. The syenites and granosyenites are composed of microcline, albite-oligoclase, arfvedsonite, hastingsite, aegirine, lepidomelane and melanite; accessories are zircon, fluorite, apatite, titanite and magnetite. In the nepheline syenites there are 0-45% of nepheline, 6-28% cancrinite, aegirine, hastingsite, lepidomelane and melanite with accessory zircon, apatite, titanite, fluorite, garnet, ilmenite and magnetite.

References: 
MONICH, V.K., ABDRAKHMANOV, K.A., NURLIBAYEV, A.N., ZHYR'ANOV, V.N., STAROV, V.I., NARSEEV, A.A., BUGAEZ, A.N. and SEMENOV, Yu, A. 1965a. Alkaline intrusions of Kazakhstan and their age correlation. Abstracts of the First Kazakhstan Petrographic Conference. Kazakhstan Academy of Science, Alma-Ata. 19-22.MONICH, V.K., IVANOV, A.I., KOMLEV, L.V., LAPICHEV, G.F. and SEMENOV, T.P. 1965b. Age of magmatic and metamorphic rocks of the East Kazakhstan geochronological scale. In Magmatism and metamorphism of East Kazakhstan. 27-8. Akademii Nauk Kazakhstan SSR, Alma-Ata.
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