Lead isotopes tracing the life cycle of a catchment: From source rock via weathering to human impact

Philippe Jean Negrel1, Emmanuelle Petelet-Giraud2, Catherine Guerrot1 and Romain Millot3, (1)BRGM, Laboratories Division, Cedex, France, (2)BRGM, Orleans, France, (3)BRGM, French Geological Survey, Orleans, France