DBPapers

TRACING URANIUM RICH ENVIRONMENTS BY CHLORIDE-36 CONCENTRATIONS OF GROUNDWATER

AUTHOR/S: W. BALDERER, V. ALFIMOV, A. SYNAL, F. LEUENBERGER
Sunday 1 August 2010 by Libadmin2009

9th International Multidisciplinary Scientific GeoConference - SGEM2009, www.sgem.org, SGEM2009 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 14-19, 2009, Vol. 1, 551-558 pp

ABSTRACT

Using 36Cl dissolved in groundwater as a monitor of sub-surface neutron fluxes makes it
possible to reconstruct information on the U and Th contents of the rocks interacting
with the groundwater flow. In particular, the concentrations of radioelements such as
uranium and thorium can be evaluated, which are the dominant source of the subsurface
neutron flux. This can provide important information in connection with
exploration of uranium ore deposits. Based on the results of several case studies from
aquifers in crystalline and sedimentary rocks with moderate to high uranium contents it
is demonstrated that groundwater especially from uranium ore deposits shows
characteristic 36Cl concentrations which are high above today’s levels of atmospheric
precipitation even for young groundwater of short residence times.

Keywords: 36Cl, Groundwater, Underground Production, Prospection of Uranium ore deposits