Abstract
The isotopic composition of oxygen and carbon was studied in accessory carbonates and quartz separated from salts in Upper Devonian halogenous formations of the Pripyat Trough (Belorus). It is established that isotopic characteristics vary in a wide range. Values of δ18O vary in the following range (SMOW): from 18.2 to 29.2‰ in calcites, from 15.7 to 32.5‰ in dolomites, and from 17.4 to 27.2‰ in quartz. Values of δ13C range from –13.4 to 1.4‰ in calcites and from –11.1 to 1.7‰ in dolomites (PDB). Results obtained indicate highly variable isotope-geochemical conditions of sedimentation and early diagenesis during the formation of evaporitic sediments. Accessory minerals were repeatedly formed in a wide temperature range and probably at various stages of the lithogenesis.
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