Uranium-234 in vadose zone and perched waters of the Apache Leap Tuff, Central Arizona
Natural enrichment of ²³⁴U with respect to ²³⁸U was investigated in perched water, vadose zone pore waters, and secondary minerals. The activity ratio (AR) for dissolved ²³⁴U increased from about 1.4 in runoff to >6 in perched water. The AR in the vadose zone increased sharply at a transition tha...
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| Language: | en |
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The University of Arizona.
1996
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| Online Access: | http://hdl.handle.net/10150/191210 |