<?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>A. Schimmelmann</dc:contributor>
  <dc:creator>Maria Mastalerz</dc:creator>
  <dc:date>2002</dc:date>
  <dc:description>Hydrogen isotopic exchangeability (Hex) and ??Dn values of non-exchangeable organic hydrogen were investigated in coal kerogens ranging in rank from lignite to graphite. The relative abundance of Hex is highest in lignite with about 18% of total hydrogen being exchangeable, and decreases to around 2.5% in coals with Ro of 1.7 to ca. 5.7%. At Still higher rank (Ro &gt; 6%), Hex increases slightly, although the abundance of total hydrogen decreases. ??Dn is influenced by original biochemical D/H ratios and by thermal maturation in contact with water. Therefore, ??Dn does not show an overall consistent trend with maturity. ?? 2002 Elsevier Science Ltd. All rights reserved.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1016/S0146-6380(02)00064-5</dc:identifier>
  <dc:language>en</dc:language>
  <dc:title>Isotopically exchangeable organic hydrogen in coal relates to thermal maturity and maceral composition</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>