Re: U in coal and minerals

[Susan Gawarecki <loc@icx.net>]

Although the subject of uranium deposition strays considerably from my
expertise in geology (geomorphology, neotectonics, hydrogeology), I
expect that locations of uranium deposits are influenced by preferred
groundwater flow paths.  This would explain zonation within lignite
deposits and shales and uranium mineralization of degradable organic
remains in a less permeable matrix, both situations due to higher rates
of U-bearing waters flowing through slightly more porous zones.  Also,
precipitation of uranium minerals would probably be induced in the
mixing zone of groundwaters with two different geochemistries.
-- 
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Susan L. Gawarecki, Ph.D., Executive Director
Oak Ridge Reservation Local Oversight Committee, Inc.
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Phone (423) 483-1333; Fax (423) 482-6572; E-mail loc@icx.net
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