<?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:contributor>J. H. Stewart</dc:contributor>
  <dc:creator>R. P. Fischer</dc:creator>
  <dc:date>1961</dc:date>
  <dc:description>&lt;p&gt;&lt;span class="ScopusTermHighlight"&gt;Deposits&lt;/span&gt;&lt;span&gt;&amp;nbsp;of&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;copper&lt;/span&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;vanadium&lt;/span&gt;&lt;span&gt;, and&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;uranium&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;nonmarine sandstones are numerous and widespread.&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Copper&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;deposits&lt;/span&gt;&lt;span&gt;, with or without&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;uranium&lt;/span&gt;&lt;span&gt;, are mainly resident&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;first-generation arkosic sandstones derived from granitic rock terrains;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;deposits&lt;/span&gt;&lt;span&gt;&amp;nbsp;rich&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;vanadium&lt;/span&gt;&lt;span&gt;, with or without much&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;uranium&lt;/span&gt;&lt;span&gt;, are dominantly&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;second-generation sandstones derived from sedimentary rocks; and the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;uranium&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;deposits&lt;/span&gt;&lt;span&gt;&amp;nbsp;with little or no&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;vanadium&lt;/span&gt;&lt;span&gt;&amp;nbsp;or&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;copper&lt;/span&gt;&lt;span&gt;&amp;nbsp;are&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;either first- or second-generation sandstones, many of which are associated with beds containing volcanic debris. All three metals are dispersed&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;igneous rocks but not&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;close association.&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Copper&lt;/span&gt;&lt;span&gt;&amp;nbsp;and&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;uranium&lt;/span&gt;&lt;span&gt;&amp;nbsp;enter the hydrothermal environment, but the record of&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;vanadium&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;hydrothermal solutions and veins is scant. Some of the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;uranium&lt;/span&gt;&lt;span&gt;&amp;nbsp;and most of the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;copper&lt;/span&gt;&lt;span&gt;&amp;nbsp;minerals&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;igneous rocks and veins oxidize readily and the metals go into surface- and ground-water solutions, but the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;vanadium&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;igneous rocks is not so easily mobilized-under normal geologic conditions, conceivably it may require diagenetic reactions and a second period of weathering to solubilize much&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;vanadium&lt;/span&gt;&lt;span&gt;. All three metals precipitate from solutions&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;the presence of a reducing agent, such as carbonaceous material or associated sulfide ions, either&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;sediments as they accumulate or&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;existing rocks. These&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;geochemical&lt;/span&gt;&lt;span&gt;&amp;nbsp;habits permit the concept that&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;copper&lt;/span&gt;&lt;span&gt;&amp;nbsp;and&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;uranium&lt;/span&gt;&lt;span&gt;&amp;nbsp;are made available by weathering of igneous rock terrains and hence might accumulate&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;first-generation sediments, whereas&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;vanadium&lt;/span&gt;&lt;span&gt;&amp;nbsp;would be commonly available only after a second period of weathering. Perhaps the oxidation or devitrification of volcanic debris may contribute&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;uranium&lt;/span&gt;&lt;span&gt;&amp;nbsp;to ground waters as does the weathering, of igneous rocks.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.2113/gsecongeo.56.3.509</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Society of Economic Geologists</dc:publisher>
  <dc:title>Copper, vanadium, and uranium deposits in sandstone-their distribution and geochemical cycles</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>