<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Charles S. Spirakis</dc:creator>
  <dc:date>1979</dc:date>
  <dc:description>&lt;p&gt;As a sulfate-bearing, hydrothermal solution cools to less than about 200°C, kinetic factors prevent sulfate from entering into oxidation-reduction reactions. Consequently, the reducing effect of H&lt;sub&gt;2&lt;/sub&gt;S (and other reduced species) is not balanced with the oxidizing effect of SO&lt;sub&gt;4&lt;sup&gt;= &lt;/sup&gt;&lt;/sub&gt;to the same extent as at higher temperatures. The result is a lower effective Eh of the system. This decrease in the effective Eh due to a slowing of the rate of sulfate reduction with cooling may be the precipitation mechanism for many types of ore deposits.&lt;br&gt;&lt;br&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/ofr79673</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>The possible role of sulfate-reduction kinetics in the formation of hydrothermal uranium deposits</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>