Alkaline Rocks and Carbonatites of the World

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Dyke Field


Occurrence number: 
Longitude: 75.25, Latitude: 50.83

Fifteen kilometres to the southeast of the Berkutinskii intrusion there is a field of dykes and dyke-shaped bodies which are situated to the northeast of the town of Zsheltan. It stretches for 10-12 km with a width of 3-4 km; individual dykes are from 0.1 to 0.3 km thick. The dykes are of fine-grained arfvedsonite-riebeckite syenite and granosyenite and also contain aegirine and accessories including fluorite. There are some peralkaline syenites which are cut by veins of sodalite-nepheline syenite in which the nepheline comprises 20-45% and sodalite plus cancrinite 5-25%.

Later Palaeozoic.
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.SEVRYUGIN, N.A. and SEMENOVA, T.P. 1960. The determination of the age of the eruptive rocks of the Degelen-Chingiz region by the Ar method. Trudy Kazakhstan IMS, 3: 91-9.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith