Adams, John A. S.2018-12-182018-12-181983Ageli, Hadi S.. "Atmospheric and deep seated sources of unsupported lead-210 in soil profiles and the use of lead-210 and polonium-210 as indicators of uranium mineralization at depth." (1983) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/103918">https://hdl.handle.net/1911/103918</a>.https://hdl.handle.net/1911/103918The increase of supported lead-21/polonium-21 with depth in soil profiles over buried uranium ore has been found to be a very cost effective method of uranium prospecting. Lead-21/polonium-21 soil profiles of the uppermost meter are superior to radon-222 track etch cups because the flux of radon-222 is highly variable from time to time depending on many factors, such as changes in wind velocity, pressure, and temperature. On the other hand, lead-21 has a half-life of 22.3 years and it is a time-integrated measurement of radon-222; the method integrates over six half-lives of lead-21 (about 133 years). At Felder Mine, Texas, the lead-21/polonium-21 soil profile increases with depth across a fault zone since the faulting facilitates the upward migration of radon-222. Reversed profiles have been observed where radon-222 accumulates under a semi-impermeable caliche layer. Also at Felder, polonium-21 from the radon-222 mobilized and released to the atmosphere during strip mining operations was detected where the soil had been removed.59 ppengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.ThesisRICE1544reformatted digitalThesis Geol. 1983 Ageli