Isotope dating groundwater

Theoretical underpinnings of the methods and guidelines for their use in different hydrogeological environments are described.

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D., 1993a, Environmental Tracers for age-dating young ground water, Alley, W.

N., and Busenberg, E., 1993, CFC's-- Tools for Age-Dating and Tracing Shallow Ground Water.

C., 1993, Age dating ground water by use of chlorofluorocarbons (CCl), and distribution of chlorofluorocarbons in the unsaturated zone, Snake River Plain aquifer, Idaho National Engineering Laboratory, Idaho.

Geological Survey Water-Resources Investigations 93-4054, 47p.

Likewise, a consultant might use isotope ages to prove that owner A, who bought property in 1965, is responsible for a contaminant leak rather than owner B who bought the property in 1980.

This article serves as an introduction to isotopes that are used to determine residence time, sources for age-dating isotopes, and guides for assessing which isotopes are appropriate with regard to their age-range, sample volume size, and analytical measurement.If the solid-to-liquid mass transfer rate is governed by the radioactive decay of U and Th, significant (i.e.measurable) amounts of radiogenic He content of ground-water samples.The methods, findings and conclusions presented in this publication will enable students and practicing groundwater scientists to evaluate the use of isotope dating tools for specific issues related to the assessment and management of groundwater resources.In addition, the guidebook will be of use to the scientific community interested in issues related to radioactive waste disposal in geological repositories.This guidebook provides theoretical and practical information on using a variety of isotope tracers for dating old groundwater, i.e.

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