<?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>Kenneth J. Bird</dc:contributor>
  <dc:contributor>Leslie B. Magoon</dc:contributor>
  <dc:creator>Timothy S. Collett</dc:creator>
  <dc:date>1993</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;On the North Slope of Alaska, geothermal gradient data are available from high-resolution, equilibrated well-bore surveys and from estimates based on well-log identification of the base of ice-bearing permafrost. A total of 46 North Slope wells, considered to be in or near thermal equilibrium, have been surveyed with high-resolution temperatures devices and geothermal gradients can be interpreted directly from these recorded temperature profiles. To augment the limited North Slope temperature data base, a new method of evaluating local geothermal gradients has been developed. In this method, a series of well-log picks for the base of the ice-bearing permafrost from 102 wells have been used, along with regional temperature constants derived from the high-resolution stabilized well-bore temperature surveys, to project geothermal gradients. Geothermal gradients calculated from the high-resolution temperature surveys generally agree with those projected from known ice-bearing permafrost depths over most of the North Slope. Values in the ice-bearing permafrost range from&amp;nbsp;&lt;/span&gt;&lt;span class="math"&gt;&lt;span id="MathJax-Element-1-Frame" class="MathJax_SVG" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;mtext&gt;&amp;amp;#x2248;&lt;/mtext&gt;&lt;mtext&gt;1.5&amp;amp;#xB0;&lt;/mtext&gt;&lt;mtext&gt;C&lt;/mtext&gt;&lt;mtext&gt;100&lt;/mtext&gt;&lt;mtext&gt;m&lt;/mtext&gt;&lt;/math&gt;"&gt;&lt;span class="MJX_Assistive_MathML"&gt;≈1.5°C100m&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;in the Prudhoe Bay area to&amp;nbsp;&lt;/span&gt;&lt;span class="math"&gt;&lt;span id="MathJax-Element-2-Frame" class="MathJax_SVG" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;mtext&gt;&amp;amp;#x2248;&lt;/mtext&gt;&lt;mtext&gt;4.5&amp;amp;#x3B4;&lt;/mtext&gt;&lt;mtext&gt;C&lt;/mtext&gt;&lt;mtext&gt;100&lt;/mtext&gt;&lt;mtext&gt;m&lt;/mtext&gt;&lt;/math&gt;"&gt;&lt;span class="MJX_Assistive_MathML"&gt;≈4.5&lt;i&gt;δ&lt;/i&gt;C100m&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;in the east-central portion of the National Petroleum Reserve in Alaska. Geothermal gradients below the ice-bearing permafrost sequence range from&amp;nbsp;&lt;/span&gt;&lt;span class="math"&gt;&lt;span id="MathJax-Element-3-Frame" class="MathJax_SVG" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;mtext&gt;&amp;amp;#x2248;&lt;/mtext&gt;&lt;mtext&gt;1.6&amp;amp;#xB0;&lt;/mtext&gt;&lt;mtext&gt;C&lt;/mtext&gt;&lt;mtext&gt;100&lt;/mtext&gt;&lt;mtext&gt;m&lt;/mtext&gt;&lt;/math&gt;"&gt;&lt;span class="MJX_Assistive_MathML"&gt;≈1.6°C100m&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;to&amp;nbsp;&lt;/span&gt;&lt;span class="math"&gt;&lt;span id="MathJax-Element-4-Frame" class="MathJax_SVG" data-mathml="&lt;math xmlns=&amp;quot;http://www.w3.org/1998/Math/MathML&amp;quot;&gt;&lt;mtext&gt;&amp;amp;#x2248;&lt;/mtext&gt;&lt;mtext&gt;5.2&amp;amp;#xB0;&lt;/mtext&gt;&lt;mtext&gt;C&lt;/mtext&gt;&lt;mtext&gt;100&lt;/mtext&gt;&lt;mtext&gt;m&lt;/mtext&gt;&lt;/math&gt;"&gt;&lt;span class="MJX_Assistive_MathML"&gt;≈5.2°C100m&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1016/0165-232X(93)90071-F</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Elsevier</dc:publisher>
  <dc:title>Subsurface temperatures and geothermal gradients on the north slope of Alaska</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>