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<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>A. S. Van Denburgh</dc:contributor>
  <dc:contributor>A.H. Truesdell</dc:contributor>
  <dc:contributor>S.L. Rettig</dc:contributor>
  <dc:creator>B.F. Jones</dc:creator>
  <dc:date>1969</dc:date>
  <dc:description>&lt;p id="simple-para.0010"&gt;Study of several closed drainages in the Great Basin has shown that the interstitial solutions of shallow, fine-grained playa deposits store a large quantity of dissolved solids and are often more concentrated than associated lakes and ponds, except in peripheral zones of stream or ground-water inflow. These interstitial fluids, when compared with local runoff, impoundments, or spring waters, commonly have a distinctive ionic composition which sometimes cannot be explained by either simple mixing of surface and subsurface inflow or by evaporative concentration.&lt;/p&gt;&lt;p id="simple-para.0015"&gt;At Abert Lake, Oregon, the interstitial solute concentrations increased with depth to values as much as five times greater than the lake, except where springs indicate significant ground-water input. Where Na&lt;sup&gt;+&lt;/sup&gt;, Cl, and CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;species constitute more than 90% of the solutes,&lt;span&gt;&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;Na&lt;/mtext&gt;&lt;msup&gt;&lt;mi&gt;&lt;/mi&gt;&lt;mn&gt;+&lt;/mn&gt;&lt;/msup&gt;&lt;mtext&gt;Cl&lt;/mtext&gt;&lt;msup&gt;&lt;mi&gt;&lt;/mi&gt;&lt;mn&gt;&amp;amp;#x2212;&lt;/mn&gt;&lt;/msup&gt;&lt;/math&gt;"&gt;&lt;span class="MJX_Assistive_MathML"&gt;Na+Cl−&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;ratios in the lake water are lower than in interstitial solutions of bottom cores and higher than in playa fluids. At the same time,&lt;span&gt;&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;Na&lt;/mtext&gt;&lt;msup&gt;&lt;mi&gt;&lt;/mi&gt;&lt;mn&gt;+&lt;/mn&gt;&lt;/msup&gt;&lt;mtext&gt;K&lt;/mtext&gt;&lt;msup&gt;&lt;mi&gt;&lt;/mi&gt;&lt;mn&gt;+&lt;/mn&gt;&lt;/msup&gt;&lt;/math&gt;"&gt;&lt;span class="MJX_Assistive_MathML"&gt;Na+K+&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;ratios are highest in the fluids of lake bottom muds and lowest in playa interstitials. In deeper playa profiles, interstitial&lt;span&gt;&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;Na&lt;/mtext&gt;&lt;msup&gt;&lt;mi&gt;&lt;/mi&gt;&lt;mn&gt;+&lt;/mn&gt;&lt;/msup&gt;&lt;mtext&gt;Cl&lt;/mtext&gt;&lt;msup&gt;&lt;mi&gt;&lt;/mi&gt;&lt;mn&gt;&amp;amp;#x2212;&lt;/mn&gt;&lt;/msup&gt;&lt;/math&gt;"&gt;&lt;span class="MJX_Assistive_MathML"&gt;Na+Cl−&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;tended to decrease with depth (5 ft. maximum).&lt;/p&gt;&lt;p id="simple-para.0020"&gt;In the Abert Lake area, as in other parts of the western Great Basin,&lt;span&gt;&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;Na&lt;/mtext&gt;&lt;msup&gt;&lt;mi&gt;&lt;/mi&gt;&lt;mn&gt;+&lt;/mn&gt;&lt;/msup&gt;&lt;mtext&gt;Cl&lt;/mtext&gt;&lt;msup&gt;&lt;mi&gt;&lt;/mi&gt;&lt;mn&gt;&amp;amp;#x2212;&lt;/mn&gt;&lt;/msup&gt;&lt;/math&gt;"&gt;&lt;span class="MJX_Assistive_MathML"&gt;Na+Cl−&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;ratios are indicative of total CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;in solution and the effects of organic decay in surficial sediments. These ratios, coupled with data on silica and bulk density, show that higher P&lt;sub&gt;CO2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;accompanying decay promotes silicate dissolution and hydrogen ion exchange, stripping alkalis from sediment which had preferentially adsorbed K&lt;sup&gt;+&lt;/sup&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;when entering the lake. On subsequent loss of pore fluid in the playa regime, silica initially released to solution in the lake environment is readsorbed on dissolution products.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1016/0009-2541(69)90049-7</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Elsevier</dc:publisher>
  <dc:title>Interstitial brines in playa sediments</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>