[Carnallite as a promising source of raw materials for the development of potassium processing industry in Belarus]
2005
Petrova, N.S.(Belarus Research Geological Prospecting Inst., Minsk (Belarus)) | Vysotskij, Eh.A. | Dashkevich, V.P.(Belarus State Univ., Minsk (Belarus)) | Plutenko, V.S.(Belarus Geological Prospecting Expedition)
Carnallite (KCl MgCl2 6H2O) is one of the main rock-forming minerals composing potassium horizons of halogenic formations. It occurs in a close paragenetic association with sylvite and halite. Almost all potassium accumulation stages in the Earth's history, except the Silurian and Vendian, were marked by carnallite formation. Carnallite had been deposited most intensively and universally in the Early Cambrian (East Siberian basin), Late Devonian (Pripyat basin), Early Permian (Dnieper-Donets, Caspian, Upper Kama and Upper Pechora basins), Late Permian (Central European basin), Late Triassic, as well as during the Early and Late-Cretaceous epochs. Carnallite occurs as independent beds in the section of potassium horizons and as a component of mixed salts in potassium horizons in, respectively, northern and central zones of the Pripyat Trough. Carnallite rocks form in plan three isolated areas. Types of facies relationships are evident in the rock distribution over the area. Carnallite rocks were discovered in the composition of ten potassium horizons. These are unevenly distributed in the section of the potassium-bearing subformation and form three floors. Carnallite rocks are mostly abundant on the third floor (VIII-X rhythmic units). In the section of some potassium horizons (VIII-p, II-7, III, 0-7, 0-15, etc.) carnallite rock forms up to 58 t thick beds. Thick deposits of high quality carnallite are widespread in the potassium horizon 07 within the Starobin synclinal zone
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