The Potential for Dating Groundwater Using Radiogenic Noble Gases
The accumulation in groundwater of products from the radioactive decay of elements naturally found in rocks offers a potential for measuring the time that the groundwater has been contact with the rock. This dating method has an advantage over using decay products from the atmosphere in that the amount of decay products increases with age rather than decreases. However, different decay products accumulate at different rates and, thus, have a different potential usefulness in age determinations. The most useful decay product is helium, produced from uranium and thorium. The use of Ar-40 produced from potassium is limited because Ar-40 is abundant in meteoric water. Neon, xenon and krypton are useful with great difficulty because they are produced in extremely small quantities. In general, the potential for error increases when a long time is required to produce a small quantity of the dating nuclide.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC09-76SR00001
- OSTI ID:
- 780255
- Report Number(s):
- DP-MS-79-82 Rev. 1; WRERAQ; TRN: US0102456
- Journal Information:
- Water Resources Research, Other Information: PBD: 23 Mar 2001; ISSN 0043-1397
- Country of Publication:
- United States
- Language:
- English
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