<?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>H. W. Sundelius</dc:creator>
  <dc:date>1963</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Peg&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Claims&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatites&lt;/span&gt;&lt;span&gt;&amp;nbsp;are located southwest of Rockland in the towns of Warren and Cushing, Knox County,&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Maine&lt;/span&gt;&lt;span&gt;. These&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatites&lt;/span&gt;&lt;span&gt;&amp;nbsp;are representative of a group of zoned, granitic, lithium-bearing&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatites&lt;/span&gt;&lt;span&gt;&amp;nbsp;in which&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;spodumene&lt;/span&gt;&lt;span&gt;&amp;nbsp;is present nearly from wall to wall. The&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatites&lt;/span&gt;&lt;span&gt;&amp;nbsp;are discordant, steeply dipping, tabular bodies in the Penobscot quartz-mica schist near the Waldoboro granite. A narrow quartz-tourmaline-muscovite-apatite aureole is commonly developed around each of the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatites&lt;/span&gt;&lt;span&gt;&amp;nbsp;and around inclusions of country rock in the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatites&lt;/span&gt;&lt;span&gt;. The&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatites&lt;/span&gt;&lt;span&gt;&amp;nbsp;are zoned, and each may be subdivided into: (1) a narrow quartz-muscovite border zone; (2) a narrow albite-quartz-muscovite wall zone; (3) and an albite-quartz-&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;spodumene&lt;/span&gt;&lt;span&gt;-perthite core that constitutes most of the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatite&lt;/span&gt;&lt;span&gt;. Cross-cutting, fine-grained, quartz-albite-&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;spodumene&lt;/span&gt;&lt;span&gt;-muscovite lenses are found within&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatite&lt;/span&gt;&lt;span&gt;&amp;nbsp;cores. The bulk mineralogy and variations in the mineralogy from zone to zone of the largest body (Dike 1) were determined by megascopic mineral point-counts. There is a decrease of albite, quartz, and muscovite and an increase of&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;spodumene&lt;/span&gt;&lt;span&gt;&amp;nbsp;and perthite from the border and wall zones into the core. The alkali contents of Dike 1 and of each of its zones were determined by flame photometer and X-ray fluorescence analyses. The amount of Na20 decreases and the amounts of K&amp;nbsp;&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;O, Li&amp;nbsp;&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;0, Rb&amp;nbsp;&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;0, and CS&amp;nbsp;&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;O increase from the border and wall zones into the core. Estimated bulk compositions of Dike 1 and of each of its zones were computed. It is concluded that the distribution, structural features, bulk chemistry, and the mineralogical, chemical, and textural zoning of the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pegmatites&lt;/span&gt;&lt;span&gt;&amp;nbsp;are consistent with development by fractional crystallization of a pegma-titic fluid in a restricted system.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.2113/gsecongeo.58.1.84</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Society of Economic Geologists</dc:publisher>
  <dc:title>The peg claims spodumene pegmatites, Maine</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>