A radiochemical, hydrochemical and dissolved gas study of groundwaters in the Molasse basin of Upper Austria

Noble Gases in Lakes and Ground Waters

“…Comparable fluxes of 4 He have been reported for several aquifers (e.g., Heaton 1984;Martel et al 1989;Castro et al 1998a;Beyerle et al 1999a) as well as for lakes (see above). However, other studies found significantly lower 4He fluxes (e.g., Andrews et al 1985;Stute et al 1992b;Castro et al 2000).…”

A paleotemperature record derived from dissolved noble gases in groundwater of the Aquia Aquifer (Maryland, USA)

“…Temperature differences of ϳ5 to 7°C were found in studies at higher latitudes in Europe (e.g., Andrews and Lee, 1979;Andrews et al, 1985;Rudolph et al, 1984;Beyerle et al, 1998). However, in some of these NGT records, the LGM could not be clearly identified, possibly because glaciation or permafrost prevented groundwater recharge during the LGM (Andrews and Lee, 1979;Beyerle et al, 1998).…”

Infiltration of river water to a shallow aquifer investigated with 3H/3He, noble gases and CFCs

“…He ( 4 He rad ) has been widely used to estimate water residence times of up to 10 8 years in old groundwater systems (e.g., Andrews and Lee, 1979;Andrews et al, 1985;Torgersen and Clarke, 1985). Groundwater 4 He ages are based on the assumption that 4 He rad is generated by the decay of U and Th in the aquifer matrix and accumulates continuously in the groundwater.…”