stripes
The Tutekskii intrusion is situated high on the Alai mountain ridge. It is a stock-like body of 23 km2 cutting Silurian mica and alkali amphibole schists. The central part of the intrusion is composed of medium- and coarse-grained biotite-nepheline syenites and pyroxenites. Zones of fenitization are developed at the margins of the intrusion by interaction with sedimentary rocks, and particularly with volcanics. The alkaline rocks are crossed by dykes of nepheline syenite pegmatite.
BARATOV, R.B., DUSMATOV, V.D. and MELNICHENKO, A.K. 1969. First data on the K-Ar age of the nepheline syenites of the Tutek-Devonasuzhsky massif (Alaisky ridge) Doklady of the Academy of Sciences, Tadzhikistan SSR, 12(12): 41-3.
KAYUMOV, A.K. and KARABAEV, K.K. 1981. Alkaline magmatism and ore-formation of the south Tyan-Shan. Uzbek Academy of Science Publishers, Tashkent. 135 pp.
MELNICHENKO, A.K. and DUSMATOV, V.D. 1974. Formation time of the alkaline rocks of the Gissaro-Alay according to the data of geochronometrical observations (south Tyan-Shan). In New data on absolute geochronology (XVII session), 330-41. Nauka, Moscow.