Geochemical features of aquatic environment in crater and barrier lakes in northeast of China

Abstract

There are many crater and barrier lakes formed by volcanic activity in northeast of China. These lakes are very rich in fresh water resource. This paper reports systematically geochemical features of some elements in water and sediment in crater and barrier lakes, and discusses the vertical changes, seasonal variation of some elemental concentrations in the lake water and the correlation and the moving coefficient of some elements in sediment. The result shows that the concentrations of Na, Rb, Cs, K, Be, W and F in the crater lake water are higher than those in the barrier lake water, the concentrations of Pb and La are higher and the concentrations of V, Co and Ba are lower in the crater lake sediment than in the barrier lake sediment. Moreover, the concentrations of elements in the lake water and sediment are effected strongly by the lithological characters of the catchment; on the other hand, the biogeochemical effect also acts as an important role.