Usgs groundwater age dating
The model recharge ages of young fraction of water were determined using three different dating methods.
The results indicate that significant amount of young ground water was added at various locations to the older regional ground water (greater than 50 years) within and outside the INEEL boundaries.
The relatively low-cost gas-chromatographic analysis of helium prior to submittal of samples for He dating, such as in areas where the old fraction contains mixed mantle and crustal helium sources (Plummer et al, 2000). J., 1979, Inert gases in groundwater from the Bunter Sandstone of England as indicators of age and paleoclimatic trends.
Helium analyses can be used to screen samples collected for He dating that may contain large excesses of terrigenic helium (helium of mantle and/or crustal origin), and ultimately cannot be dated.
This document is also available in pdf format: fs-022-02(1.0 MB) The Cook Inlet Basin (Fig.