Sr isotopes as mixing and lithological tracers: the Ebro River Basin

Abstract : The Ebro River, located in North-Eastern Spain, rises near the Atlantic coast in the Cantabrian Mountains and flows into the western Mediterranean Sea through several large cities and agricultural, mining and industrial areas. The river is one of the largest contributors of freshwater in the Mediterranean Sea and ends in the Ebro delta. Through sampling of the Ebro River along its main course and its main tributaries during one field campaign, the behavior of Sr and its isotopes during water/rock interactions at the scale of a large river basin having various lithologies is reported.