About some peculiarities of volcanism of the central part of the Siberian platform and regularities of spatial distribution of Iceland spar deposits
Abstract
A set of magmatic formations associated with the Upper Paleozoic-Lower Mesozoic magmatic cycle, similar in geologic position, as well as in mineralogical and chemical composition, researchers refer to the Siberian Trappe Formation. This formation includes intrusive and effusive rocks of basic composition, pyroclastic formations of tuffogenic strata of the Angarsk series (Tunguska Formation), which were formed due to products of early phases of volcanic activity. These rocks within the northern and central parts of the Siberian Platform occupy a vast territory. For example, tuffogenic deposits of the late Paleozoic and early Mesozoic, as well as lava covers overlying them, are located in the basins of the Nizhnaya and Podkamennaya Tungusok, Kureika, Khatanga, upper and middle reaches of the Kotuy, Kheta and upper Olenek rivers. The area occupied by them is at least 700,000 km2. At present, magmatic formations of this territory attract great attention of researchers in connection with the development of such important issues as stratigraphy and tectonics of volcanogenic formations and processes of volcanism. The study of these issues will help to reveal the industrial prospects of this vast territory.
References
- Lavrsky A. Plagioclase-augite rocks between the Yenisei and the Lena. Proceedings of the Society of Nature Testers. ed. of Kazan University, 1900. vol. 34, vol. 1.
- Lebedeva A. P. Some issues of geology of Siberian traps in the light of new data. Proceedings of the AS USSR, Geological Series, 1951, No. 4.
- Skropyshev A. V. Paraffin from a polymetallic vein. Reports of the AS USSR, New Series, 1953, vol. 88, No. 4
- Sobolev V. S. Geological and petrographic sketch of the Ilimpei River. Proceedings of the Geographical Society, 1935, No. 6.
- Chekanovsky A. L. Diary of the expedition along the N. Tunguska, Olenek and Lena rivers in 1873-1875. Proceedings of the Russian Geographical Society, 1896.
- Obruchev S. V. Tunguska Basin. Proceedings of the All-Union Geological Exploration Association, 1932-1933, vol. 1, iss. 164; vol. 2, iss. 172.
- Yavorskii P. K. Geological Investigations on the Angara River in 1890. Geological Investigations on the Line of the Siberian Railroad, 1898, vol. 7.