Distribution of Cambrian salts in the western Siberian craton (Yurubcheno-Tokhomo field, Russia)

An integrated logging and deep drilling data interpretation has provided insight to the section of the Yurubcheno-Tokhomo field. Five phases of salt deposition of 50–350 m in the cumulative thickness have been identified (top–bottom): upper Litvintsevo, Angara, upper Belsk, upper Usolye, and lower Usolye. Cumulative thickness of Cambrian salts was found to reach 550–600 m, with predominance of 1- to 9-m salt layers. In the Cambrian, the study area was a shallow warm basin of sabkha type and favored salt evaporation. Regression periods controlled the thicknesses of salts.