Dating groundwater


09-Jul-2020 10:42

Based on the chemical and noble gas concentrations and the dating results, we conclude that the brine originates from evaporated seawater that has been modified by later water-rock interaction.As the obtained tracer ages cover several glacial cycles, we discuss the impact of the glacial cycles on flow patterns in the studied aquifer system.Gerber, Christoph, Vaikmae, Rein, Aeschbach, Werner, Babre, Alise, Jiang, Wei, Leuenberger, Markus, Lu, Zheng -Tian, Mokrik, Robert, Muller, Peter, Raidla, Valle, Saks, Tomas, Waber, H. Niklaus, Weissbach, Therese, Zappala, Jake C., & Purtschert, Roland. Gerber, Christoph, Vaikmae, Rein, Aeschbach, Werner, Babre, Alise, Jiang, Wei, Leuenberger, Markus, Lu, Zheng -Tian, Mokrik, Robert, Muller, Peter, Raidla, Valle, Saks, Tomas, Waber, H. Niklaus, Weissbach, Therese, Zappala, Jake C., and Purtschert, Roland. Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale. Niklaus, Weissbach, Therese, Zappala, Jake C., and Purtschert, Roland. "Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale". The age of groundwater is key in predicting which contaminants it might contain.There are many tracers and techniques that allow us to estimate the age—or mix of ages—of the groundwater we depend on as a drinking water supply.

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An apparent difference of ≃1000 yr is indicated for the average recharge age between the 2 aquifers.

By carefully explaining both the underlying theory and the underlying mathematics, this text enables readers to fully grasp the fundamentals of physical and chemical treatment processes for water and wastewater.

Kr and noble gases on groundwater from the deepest aquifer system of the Baltic Artesian Basin (BAB) were performed to determine groundwater ages and uncover the flow dynamics of the system on a timescale of several hundred thousand years.

The fully automated, computer-controlled manifold system allows analysis of the full suite of noble gases (3He/4He, He, Ne, Ar, Kr, and Xe concentrations), along with low level tritium for reporting of derived quantities that include tritium/helium-3 groundwater age, noble gas recharge temperature, and dissolved excess air concentration.

This system represents a capability for characterizing groundwater recharge conditions by dissolved gas analysis that is unmatched by any other laboratory. The $^$Kr measurements are interpreted within this mixing framework to estimate the age of the end-members.



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