Depleted Ge/Si groundwater ratios and a thermodynamic model for equilibrium fractionation in natural systems

Alida Perez-Fodich1,2, Louis A Derry1 and Arnulfo Andrés Aguirre2, (1)Institut de Physique du Globe de Paris, Paris, France, (2)Cornell University, Department of Earth and Atmospheric Sciences, Ithaca, NY, United States