Wyomings Geology Potential for U.S. Utilities
Pratiyogita kiran Boberg wrote, “It appears that currently
available evidence is in support of a hypothesis calling for combined sources
of Precambrian granites and volcanic ash falls which produce a unique,
uranium-rich, ore-forming liquid that invades very porous and permeable young
sediments to form large altered tongues and discrete deposits in a geologically
short period of mineralization.” It has been calculated that a typical altered
“tongue” would take 700,000 years to form; a typical roll-front uranium deposit
could be formed over 50,000 years. Boberg speculated it was the numerous and
extensive uranium-enriched ash falls from Middle Eocene volcanism, which was
responsible for these deposits. He wrote, “Of greatest importance is the fact
that a series of volcanic events from a variety of extrusive centers began
about 50 million years ago generating tremendous volumes of ash, which was
distributed across Wyoming and adjacent states for greater than a 40-million
year span of time.” His explanation of the volcanic ash provides a valuable
insight into how Wyomings uranium deposits were formed: pratiyogita kiran subscription online “The volcanic ash, when flushed by the first rainfall, produced a
unique fluid, which was acidic and charged with ions. The chemical reaction of
the buffering on this fluid on contact with the Precambrian granites, the ash
and other rocks brought the pH back to approximately neutral but leached
additional uranium from the granites and probably the ash. The high rainfall
and climate assured a steady supply of dissolved oxygen to the fluid resulting
in the formation of a unique, oxidizing, uranium-enriched fluid, which entered
the unconsolidated, reduced sediments oxidizing them and carrying the uranium
to the eventual maximum extent of oxidation.” pratiyogita kiran magazine
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