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RADIOACTIVITY OF WATER-BEARING ROCKS OF THE OB-ZAISAN FOLDED REGION

D. A. Novikov 1,2, F. F. Dultsev 1,2, L. G. Vakulenko 1,2, V. P. Sukhorukov 1,3, Ya. V. Fomina 1,2, N. I. Yandola 1,2, A. A. Maksimova 1,2, A. V. Chernykh 1,2, A. F. Sukhorukova 1,2, A. S. Derkachev 1,2

1 Novosibirsk State University, Novosibirsk, Russia; 2 A.A.Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia; 3 V.S.Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, Russia

The paper presents the first results of studying the radioactivity of water-bearing rocks in a wide stratigraphic range within the Ob-Zaisan folded region. It was found that contents of uranium and thorium in igneous rocks (from the Devonian to the Triassic), on average amount to 9.6 and 17.7 g/t, and 2.5 and 4.6 g/t, respectively in sedimentary rocks (from the Lower Cambrian to the Middle Jurassic). It was determined that igneous complexes of the Kolyvan granitoid massif are most enriched in uranium (up to 65.1 g/t) and thorium (up to 108.8 g/t).

Keywords: natural radionuclides, specific activity of radionuclide, uranium, thorium, potassium, West Siberia.

DOI 10.20403/2078-0575-2024-1-110-120

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