<?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>Ted G. Theodore</dc:contributor>
  <dc:contributor>Richard M. Tosdal</dc:contributor>
  <dc:contributor>Robert L. Oscarson</dc:contributor>
  <dc:creator>Vladimir Berger</dc:creator>
  <dc:date>2000</dc:date>
  <dc:description>&lt;p&gt;The Ba-feldspar celsian [BaAl&lt;sub&gt;2&lt;/sub&gt;Si&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;8&lt;/sub&gt;] has been found in quartz-skarn-sulfide deposits at the American Beauty and Summit View Mines in the Ruby Mountains, Nevada. The celsian is present in quartz-skarn-polymetallic sulfide ores formed during Jurassic and Tertiary phases of skarn formation. Well-shaped microcrystals of celsian, along with sulfide minerals and apatite, fill cavities in quartz and are related to a retrogressive hydrothermal mineral paragenesis that took place during a final stage of contact-metamorphic mineralization at temperatures of approximately 300&lt;strong&gt;&lt;span class="nounderlines"&gt;°&lt;/span&gt;&lt;/strong&gt;C. Prismatic crystals of celsian were subsequently fragmented and rounded during superposed ductile deformation of the enclosing quartz and became part of a Tertiary mylonitic fabric at the American Beauty Mine.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:language>en</dc:language>
  <dc:publisher>Geological Society of Nevada</dc:publisher>
  <dc:title>Implications of celsian in the Ruby Mountains, Elko County, Nevada</dc:title>
  <dc:type>text</dc:type>
</oai_dc:dc>