Spatiotemporal features of the distribution of Cd, Hg, Pb in bottom sediments of small lakes in the south of Western Siberia formed in various types of sedimentogenesis

Abstract

The paper presents data on the weight contents of Cd, Hg, Pb in bottom sediments of small lakes in the south of Western Siberia. For sapropel deposits of natural moisture of different types and classes, formed under conditions of all types of sedimentogenesis (humid, arid and nival), the average calculated volumetric contents of Cd, Hg, Pb: 0.05 g/m³, 0.01 g/m³, 3 g/m³, respectively. It was revealed that their volumetric quantity per 1 m³ in sapropel deposits of natural humidity of small lakes does not increase during the Holocene period, varying from lake to lake regardless of the type of sedimentogenesis and composition of bottom sediment.