stripes
The 3 x 6 km massif intrudes a schist-carbonate sequence of Upper Proterozoic age as well as granitoids. The intrusion comprises mainly peralkaline syenites with trachytic textures and small nepheline syenite bodies, with a maximum size of 250 x 900 m. Masses of ijolite-melteigite occur within the peralkaline syenites and are cut by nepheline syenite veins. Xenoliths of country rocks are common. Dykes, stocks and veins of fine-grained granite, aplite, granite porphyry, syenite porphyry and granite pegmatite are widespread in the massif. Chemical compositions are given by Sharackshinov (1984a).
KONEV, A.A. 1982. Nepheline-bearing rocks from the Sayan-Baikal area. Nauka, Siberian Branch of the Academy of Sciences, Novosibirsk. 201 pp.
SHARACKSHINOV, A.O. 1984a. Alkaline magmatism of the Vitim Plateau. Nauka, Siberian Branch of the Academy of Sciences, Novosibirsk. 183 pp.
