stripes
Basaltic lava flows extend across the water shed of the Stanovoy ridge. They are up to some 280 m in thickness and cover about 200 km2. The flows extend from the water shed along a late Quaternary river valley. The lower part of the section consists of massive pyroxene-plagioclase basalts and the upper sequence comprises peralkaline and weakly alkaline basalts including hawaiite, limburgite, nepheline and leucite basalts, olivine melanephelinite and phonolitic nephelinite. There are also ash cones. There are abundant plutonic xenoliths in the alkaline rocks including spinel lherzolites, pyroxenites, wherlites and websterites, megacrysts of augite and sanidine and xenocrysts of olivine, orthopyroxne, spinel and clinopyroxene. Chemical compositions of igneous rocks and xenoliths are given by Shcheka et al. (1983) and Semenova et al. (1984 and 1987). 87Sr/86Sr values of peralkaline basaltoids and Ti-phlogopite, kaersutite and Al-augite of 0.7045, 0.7035, 0.7038 and 0.7045 respectively have been obtained by Solov'eva et al. (1983).
SEMENOVA, V.G., SOLOV'EVA, L.V. and VLADIMIROV, B.M. 1984. Deep-seated inclusions from alkaline basaltoids from Tokinsky Stanovik. Nauka, Siberian Division of the USSR Academy of Sciences, Novosibirsk. 119 pp.
SEMENOVA, V.G., SOLOV'EVA, L.V., VLADIMIROV, B.M., ZAV'YALOVA, L.L. and BARANKEVICH, V.G. 1987. Glass and quenching phases from the deep-seated inclusions from alkaline basaltoids of Tokinsky Stanovik. In V.A. Zharikov and A.F. Grachev (eds) Deep-seated xenoliths and structure of the lithosphere. 73-95. Nauka, Moscow.
hcheka et al., 1983;
SOLOV'EVA, L.V., VLADIMIROV, B.M. and SEMENOVA, V.G. 1983.
Geochemistry of the deep-seated inclusions and alkaline basaltoids of Tokinsky Stanovik in view of the problems of their genesis. Geologiya i Geofizika, Novosibirsk, 2: 75-82.
