Home – Home – Jornals – Geography and Natural Resources 2021 number 1

Results from studying the gross content of macro- and microelements in the peat deposits of a forest swamp in the northern Sym-Dubches interfluve (Krasnoyarsk krai) are presented for the first time. The swamp was formed 11 800 years ago. The mixed deposit is formed by fen, transitional and raised bog peats of forest-boggy and swampy subtypes. It is found that the average content of elements in the raised bog and transitional types of peat is below the Clarke lithosphere. In the fen peat 12 elements significantly exceed the lithosphere Clarke. Average concentrations of elements in peats of the transitional and raised bog peat types differ slightly from each other. In the peat of the fen peat type, the concentration of a part of the elements exceeds their content in the raised bog and transitional peats by a factor of 4 to 20. A comparative analysis of the average elemental content in various species of the raised bog and transitional types showed that their values change slightly when one type changes for another. In the fen species of peat, the woody Hypnum, woody and Hypnum types that compose the bottom part of the deposit are distinguished by the highest concentration of elements. The high content of most chemical elements in the fen peat species is explained by the bog genesis, rich in water and mineral nutrition for seven thousand years, the chemical composition of peat-forming plants as well as by a combination of two processes: biogenesis and hydromorphogenesis, which contribute to the accumulation of Fe, S, P, Si, Al, Ca, Cu, Mn, Ni, Ba, V and Co. The high concentration of macro- and micronutrients, such as K, Cr, Ti, Ge, Se and Zr, was also influenced by forest fires, which occurred 5030, 5745, 7412 and 7790 years ago, as evidenced by fire layers.