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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>Robert B. Sparkes</dc:contributor>
  <dc:contributor>Jean Self-Trail</dc:contributor>
  <dc:contributor>Gavin L. Foster</dc:contributor>
  <dc:contributor>Gordon N. Inglis</dc:contributor>
  <dc:creator>Emily H. Hollingsworth</dc:creator>
  <dc:date>2024</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The Paleocene-Eocene thermal maximum (PETM; ∼56 Ma) is a hyperthermal event associated with the rapid input of carbon into the ocean-atmosphere system. The oxidation of petrogenic organic carbon (OC&lt;/span&gt;&lt;sub&gt;petro&lt;/sub&gt;&lt;span&gt;) may have released additional carbon dioxide (CO&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;), thereby prolonging the PETM. However, proxy-based estimates of OC&lt;/span&gt;&lt;sub&gt;petro&lt;/sub&gt;&lt;span&gt;&amp;nbsp;oxidation are unavailable due to the lack of suitable techniques. Raman spectroscopy is used to evaluate OC&lt;/span&gt;&lt;sub&gt;petro&lt;/sub&gt;&lt;span&gt;&amp;nbsp;oxidation in modern settings. For the first time, we explore whether Raman spectroscopy can evaluate OC&lt;/span&gt;&lt;sub&gt;petro&lt;/sub&gt;&lt;span&gt;&amp;nbsp;oxidation during the PETM. In the mid-Atlantic Coastal Plain, there is a shift from disordered to graphitised carbon. This is consistent with enhanced oxidation of disordered OC&lt;/span&gt;&lt;sub&gt;petro&lt;/sub&gt;&lt;span&gt;&amp;nbsp;and intensified physical erosion. In the Arctic Ocean, the distribution of graphitised carbon&amp;nbsp;&lt;/span&gt;&lt;i&gt;vs&lt;/i&gt;&lt;span&gt;. disordered carbon does not change, suggesting limited variability in weathering intensity. Overall, this study provides the first evidence of increased OC&lt;/span&gt;&lt;sub&gt;petro&lt;/sub&gt;&lt;span&gt;&amp;nbsp;oxidation during the PETM, although it was likely not globally uniform. Our work also highlights the utility of Raman spectroscopy as a novel tool to reconstruct OC&lt;/span&gt;&lt;sub&gt;petro&lt;/sub&gt;&lt;span&gt;&amp;nbsp;oxidation in the past.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.7185/geochemlet.2444</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>European Association of Geochemistry</dc:publisher>
  <dc:title>Enhanced petrogenic organic carbon oxidation during the Paleocene-Eocene thermal maximum</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>