By L. N. Kogarko, V. A. Konova, M. P. Orlova, A. R. Woolley (auth.)
Alkaline rocks and carbonatites have the main diverse and severe compositions of all igneous rocks. This quantity describes all of the recognized occurrences within the former USSR.
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Additional info for Alkaline Rocks and Carbonatites of the World: Part Two: Former USSR
The fourth zone, occupying the central part of the complex, has the most complicated structure and comprises coarsegrained pyroxenites, olivinites, sometimes containing melilite, calcite-amphibole-pyroxene rocks with nests of perovskite, and alkaline pegmatites, of a range of compositions, which cut the olivinites and pyroxenites extensively. The mineralogy of the olivinites is olivine (12-14% Fa), magnetite and perovskite with lesser diop- 67°23'N; 33°04'E Fig. 23 This complex lies along the western margin of Seid lake and is situated in an upland part of an east-west-trending ridge.
102-4. Akademii Nauk SSSR, Kola Branch, Petrozavodsk. P. A. 1963. Geology and petrology of the Elet'ozero massif gabbroid rocks (geology, petrography, petrology, metallogeny). Akademii Nauk SSSR, Moscow and Leningrad. 158 pp. S. 1974. The main provinces and forma- tions of the alkaline rocks. Nauka, Moscow. 376 pp. A. 1970. The geological-petrographic features of the massifs of alkaline-ultrabasic rocks of the Kola Peninsula and Northern Karelia. , 1965. The Caledonian complex of ultrabasic and alkaline rocks and carbonatites of the Kola Peninsula and Northern Karelia.
The calcite-amphibole-pyroxene rocks, as well as these minerals, also include perovskite, titanite, phlogopite, actinolite, apatite, nepheline, zirconolite and pyrochI ore . Other veins include ilmenite-titanomagnetiterich rocks, ijolite pegmatites with schorlomite, calcite carbonatites and calcite-zeolite veins with prehnite. Economic Titanomagnetite-perovskite ores form an oval pipe-like body which has been drilled to 400 m. The principal ore types are ore olivinites, ore pyroxenites and ore-amphibole pyroxenites.
Alkaline Rocks and Carbonatites of the World: Part Two: Former USSR by L. N. Kogarko, V. A. Konova, M. P. Orlova, A. R. Woolley (auth.)