<?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>Kenneth K. Segerstrom</dc:creator>
  <dc:date>1963</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The old surface that extends over a long north-striking belt in&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;northern&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Chile&lt;/span&gt;&lt;span&gt;&amp;nbsp;probably reached the mature stage of erosion by middle Tertiary time. Low areas are mantled by the piedmont&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;deposits&lt;/span&gt;&lt;span&gt;&amp;nbsp;of the pampa, and the higher parts exhibit rock decay, oxidation, leaching, and super-gene enrichment of sulfide mineral&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;deposits&lt;/span&gt;&lt;span&gt;&amp;nbsp;as a result of deep weathering. The surface and its&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;deposits&lt;/span&gt;&lt;span&gt;&amp;nbsp;are deeply eroded south of the main pampa by the Río Copiapó and its tributaries. Numerous&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;ore&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;in the thick secondary zones have not been eroded, but&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;ore&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;are few in the youthful valleys where the primary zones extend to the surface.&amp;nbsp;&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1130/0016-7606(1963)74[513:MONCAI]2.0.CO;2</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Geological Society of America</dc:publisher>
  <dc:title>Matureland of northern Chile and its relationship to ore deposits</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>