INAA study of the vertical distribution of some major and trace elements in lacustrine sediments of the Danube Delta

The vertical profiles of 4 major (Na, K, Ca and Fe) and 17 trace elements (Rb, Cs, Ba, Sc, La, Ce, Sm, Eu, Tb, Yb, Lu, Th, U, Hf, Ta, Co and Cr) have been investigated in cores collected from three lakes: Lung, Mesteru and Furtuna, all of them situated in the Fluvio-lacustrine region of the Danube Delta. All profiles are characterized by a relatively uniform distribution of these elements. The total rare earth elements to Sc correlation, as well as their concentrations normalized to the upper continental crust, determine the continental origin of these sediments.