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UDC 553.5.041:551.781.4(470.54/.56+470.58) SILICEOUS RESOURCE POTENTIAL OF THE POST-EOCENE MIDDLE TRANSURALS
P. V. Smirnov, A. O. Konstantinov
In the middle of the previous century, the large resources of opal-cristobalite rocks, which correspond to the Eocene marine deposits, were discovered in the Transurals. It is known that the major diatomite- and opoka-bearing zone is located to the west of the Irbit-Kamyshlov line. Westward of this lithofacies zone, the Lyulinvor Formation opalites are buried at a considerable depth (down to 200-300 m), which makes them unminable. At the same time, some post-Eocene deposits (Turtas, Abrosimovo, and Pelym formations), together with coeval diatomic material, contain a large, sometimes up to rock-forming, amount of opal material and Eocene diatoms reworked from the Paleogene deposits. This fact allows these horizons to be considered as a possible alternative of pure diatomites, particularly, in the production of foam glass materials.
Key words: opal-cristobalite rocks, diatomite, Irbit Formation, Turtas Formation, Pelym Formation, Abrosimovo Formation, Middle Transurals.
DOI 10.20403/2078-0575-2016-1-115-122
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