The Use of Even Uranium Isotopes as Hydrogeological Tracers

A. I. Malov

Institute of Ecological Problems of the North, Ural Branch, Russian Academy of Sciences,
nab. Severnoi Dviny 23, Arkhangelsk, 163061 Russia

E-mail: malovai@yandex.ru

Received October 13, 2010

Abstract—Parameter estimates of the process of passage into water of ²³⁴U and ²³⁸U isotopes with inequilib-
rium ratios during ²³⁸U decay in rock are given. The Northern Dvina Depression is used as an example to show
that data on the fractionation of natural U isotopes can be used to assess the duration of the contact of fresh
infiltration water of atmospheric origin with rocks, as well as the presence in rocks of areas with higher U con-
centrations, with which groundwater with higher radioactivity is associated.

Keywords: uranium isotopes, groundwater age, Vend aleurolites, Mezen syneclise

DOI: 10.1134/S0097807812040094

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