A o is modelled, measured or estimated in water from the initial well. Measurements of. Combination of tracers with similar decay timescales Inverse reaction path modeling using NETPATH indicates the predominant geochemical reactions controlling the chemical evolution of groundwater in the aquifer are incongruent dissolution of dolomite, ion exchange, methanogenesis, and oxidation of sedimentary organic matter. Comparison of 14 C model ages calculated for dissolved inorganic carbon from 24 water samples from the Upper Floridan aquifer, Florida as i unadjusted age, ii adjusted age based on the model of Fontes and Garnier , and iii adjusted age calculated using NETPATH from Plummer and Sprinkle .
In an ideal world, the tracer model age determinedby some geochemicalmethod would be a true refection of the frequency distribution of groundwater age.
Dating of Old Groundwater — History, Potential, Limits and Future
Y et, isotopic fractionation occurs between molecules and. For several decades, one of the major tools for obtaining information about. This chapter reviews some of the past radiocarbon adjustment models, the conditions under. ModellIng 36 cl and 4 he The difficulty to transfer 14 C dates into a bsolute water ages has also. In i ,agescalculated on the basis of the radioactive decay law yield a lower age limit for mixtures due to the concave shape of the exponential function see chapters 3 and 9.