<?xml version="1.0" encoding="utf-8"?>
<TEI xmlns="http://www.tei-c.org/ns/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:hal="http://hal.archives-ouvertes.fr/" xmlns:gml="http://www.opengis.net/gml/3.3/" xmlns:gmlce="http://www.opengis.net/gml/3.3/ce" version="1.1" xsi:schemaLocation="http://www.tei-c.org/ns/1.0 http://api.archives-ouvertes.fr/documents/aofr-sword.xsd">
  <teiHeader>
    <fileDesc>
      <titleStmt>
        <title>HAL TEI export of hal-02187854</title>
      </titleStmt>
      <publicationStmt>
        <distributor>CCSD</distributor>
        <availability status="restricted">
          <licence target="https://creativecommons.org/publicdomain/zero/1.0/">CC0 1.0 - Universal</licence>
        </availability>
        <date when="2026-05-02T18:45:49+02:00"/>
      </publicationStmt>
      <sourceDesc>
        <p part="N">HAL API Platform</p>
      </sourceDesc>
    </fileDesc>
  </teiHeader>
  <text>
    <body>
      <listBibl>
        <biblFull>
          <titleStmt>
            <title xml:lang="en">Gas Seeps at the Edge of the Gas Hydrate Stability Zone on Brazil’s Continental Margin</title>
            <author role="aut">
              <persName>
                <forename type="first">Marcelo</forename>
                <surname>Ketzer</surname>
              </persName>
              <idno type="halauthorid">1623228-0</idno>
              <affiliation ref="#struct-527275"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Daniel</forename>
                <surname>Praeg</surname>
              </persName>
              <email type="md5">db57901fdbe823fc458b41f5b99d059a</email>
              <email type="domain">geoazur.unice.fr</email>
              <idno type="idhal" notation="string">daniel-praeg</idno>
              <idno type="idhal" notation="numeric">179292</idno>
              <idno type="halauthorid" notation="string">41264-179292</idno>
              <idno type="ORCID">https://orcid.org/0000-0003-1107-3128</idno>
              <idno type="GOOGLE SCHOLAR">https://scholar.google.com/citations?user=kVdMiKwAAAAJ&amp;hl=en</idno>
              <idno type="IDREF">https://www.idref.fr/253120128</idno>
              <affiliation ref="#struct-577345"/>
              <affiliation ref="#struct-239385"/>
              <affiliation ref="#struct-155113"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Maria A.G.</forename>
                <surname>Pivel</surname>
              </persName>
              <idno type="halauthorid">1623229-0</idno>
              <affiliation ref="#struct-565209"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Adolpho</forename>
                <forename type="middle">Herbert</forename>
                <surname>Augustin</surname>
              </persName>
              <idno type="halauthorid">1603958-0</idno>
              <affiliation ref="#struct-577345"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Luiz</forename>
                <forename type="middle">A.</forename>
                <surname>Rodrigues</surname>
              </persName>
              <idno type="halauthorid">1051185-0</idno>
              <affiliation ref="#struct-577345"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Adriano</forename>
                <surname>Viana</surname>
              </persName>
              <email type="md5">91b48b88bb8531d818cb5635fe3b2f82</email>
              <email type="domain">petrobras.com.br</email>
              <idno type="idhal" notation="string">adriano-viana</idno>
              <idno type="idhal" notation="numeric">173212</idno>
              <idno type="halauthorid" notation="string">1277927-173212</idno>
              <idno type="RESEARCHERID">http://www.researcherid.com/rid/D-6016-2013</idno>
              <idno type="ORCID">https://orcid.org/0000-0001-8527-3080</idno>
              <idno type="IDREF">https://www.idref.fr/116311541</idno>
              <idno type="RESEARCHERID">http://www.researcherid.com/rid/http://www.researcherid.com/rid/D-6016-2013</idno>
              <affiliation ref="#struct-416617"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">José</forename>
                <surname>Cupertino</surname>
              </persName>
              <idno type="halauthorid">1623230-0</idno>
              <affiliation ref="#struct-577345"/>
            </author>
            <editor role="depositor">
              <persName>
                <forename>Publications</forename>
                <surname>Géoazur</surname>
              </persName>
              <email type="md5">f97671c6100761fd7b9ed58b45269501</email>
              <email type="domain">oca.eu</email>
            </editor>
            <funder ref="#projeurop-180491"/>
          </titleStmt>
          <editionStmt>
            <edition n="v1" type="current">
              <date type="whenSubmitted">2020-10-09 13:59:46</date>
              <date type="whenModified">2026-03-06 14:58:01</date>
              <date type="whenReleased">2020-10-12 12:43:43</date>
              <date type="whenProduced">2019-05</date>
              <date type="whenEndEmbargoed">2020-10-09</date>
              <ref type="file" target="https://hal.science/hal-02187854v1/document">
                <date notBefore="2020-10-09"/>
              </ref>
              <ref type="file" subtype="publisherPaid" n="1" target="https://hal.science/hal-02187854v1/file/Ketzer%26al_Geosciences_2019.pdf" id="file-2962683-2609592">
                <date notBefore="2020-10-09"/>
              </ref>
              <ref type="externalLink" target="https://www.mdpi.com/2076-3263/9/5/193/pdf"/>
            </edition>
            <respStmt>
              <resp>contributor</resp>
              <name key="137378">
                <persName>
                  <forename>Publications</forename>
                  <surname>Géoazur</surname>
                </persName>
                <email type="md5">f97671c6100761fd7b9ed58b45269501</email>
                <email type="domain">oca.eu</email>
              </name>
            </respStmt>
          </editionStmt>
          <publicationStmt>
            <distributor>CCSD</distributor>
            <idno type="halId">hal-02187854</idno>
            <idno type="halUri">https://hal.science/hal-02187854</idno>
            <idno type="halBibtex">ketzer:hal-02187854</idno>
            <idno type="halRefHtml">&lt;i&gt;Geosciences&lt;/i&gt;, 2019, 9 (5), pp.193. &lt;a target="_blank" href="https://dx.doi.org/10.3390/geosciences9050193"&gt;&amp;#x27E8;10.3390/geosciences9050193&amp;#x27E9;&lt;/a&gt;</idno>
            <idno type="halRef">Geosciences, 2019, 9 (5), pp.193. &amp;#x27E8;10.3390/geosciences9050193&amp;#x27E9;</idno>
            <availability status="restricted">
              <licence target="https://about.hal.science/hal-authorisation-v1/">HAL Authorization<ref corresp="#file-2962683-2609592"/></licence>
            </availability>
          </publicationStmt>
          <seriesStmt>
            <idno type="stamp" n="IRD">IRD - Institut de recherche pour le développement</idno>
            <idno type="stamp" n="INSU">INSU - Institut National des Sciences de l'Univers</idno>
            <idno type="stamp" n="CNRS">CNRS - Centre national de la recherche scientifique</idno>
            <idno type="stamp" n="OCA">Observatoire de la Cote d'Azur</idno>
            <idno type="stamp" n="GEOAZUR">Géoazur</idno>
            <idno type="stamp" n="OPENAIRE">OpenAIRE</idno>
            <idno type="stamp" n="UNIV-COTEDAZUR">Université Côte d'Azur</idno>
            <idno type="stamp" n="TEST-HALCNRS">Collection test HAL CNRS</idno>
            <idno type="stamp" n="UNIV-COTEDAZUR_COLLECTION_DEFAUT">UNIV-COTEDAZUR_COLLECTION_DEFAUT</idno>
            <idno type="stamp" n="TEST-NICE">test nice</idno>
          </seriesStmt>
          <notesStmt>
            <note type="audience" n="2">International</note>
            <note type="popular" n="0">No</note>
            <note type="peer" n="1">Yes</note>
          </notesStmt>
          <sourceDesc>
            <biblStruct>
              <analytic>
                <title xml:lang="en">Gas Seeps at the Edge of the Gas Hydrate Stability Zone on Brazil’s Continental Margin</title>
                <author role="aut">
                  <persName>
                    <forename type="first">Marcelo</forename>
                    <surname>Ketzer</surname>
                  </persName>
                  <idno type="halauthorid">1623228-0</idno>
                  <affiliation ref="#struct-527275"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Daniel</forename>
                    <surname>Praeg</surname>
                  </persName>
                  <email type="md5">db57901fdbe823fc458b41f5b99d059a</email>
                  <email type="domain">geoazur.unice.fr</email>
                  <idno type="idhal" notation="string">daniel-praeg</idno>
                  <idno type="idhal" notation="numeric">179292</idno>
                  <idno type="halauthorid" notation="string">41264-179292</idno>
                  <idno type="ORCID">https://orcid.org/0000-0003-1107-3128</idno>
                  <idno type="GOOGLE SCHOLAR">https://scholar.google.com/citations?user=kVdMiKwAAAAJ&amp;hl=en</idno>
                  <idno type="IDREF">https://www.idref.fr/253120128</idno>
                  <affiliation ref="#struct-577345"/>
                  <affiliation ref="#struct-239385"/>
                  <affiliation ref="#struct-155113"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Maria A.G.</forename>
                    <surname>Pivel</surname>
                  </persName>
                  <idno type="halauthorid">1623229-0</idno>
                  <affiliation ref="#struct-565209"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Adolpho</forename>
                    <forename type="middle">Herbert</forename>
                    <surname>Augustin</surname>
                  </persName>
                  <idno type="halauthorid">1603958-0</idno>
                  <affiliation ref="#struct-577345"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Luiz</forename>
                    <forename type="middle">A.</forename>
                    <surname>Rodrigues</surname>
                  </persName>
                  <idno type="halauthorid">1051185-0</idno>
                  <affiliation ref="#struct-577345"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Adriano</forename>
                    <surname>Viana</surname>
                  </persName>
                  <email type="md5">91b48b88bb8531d818cb5635fe3b2f82</email>
                  <email type="domain">petrobras.com.br</email>
                  <idno type="idhal" notation="string">adriano-viana</idno>
                  <idno type="idhal" notation="numeric">173212</idno>
                  <idno type="halauthorid" notation="string">1277927-173212</idno>
                  <idno type="RESEARCHERID">http://www.researcherid.com/rid/D-6016-2013</idno>
                  <idno type="ORCID">https://orcid.org/0000-0001-8527-3080</idno>
                  <idno type="IDREF">https://www.idref.fr/116311541</idno>
                  <idno type="RESEARCHERID">http://www.researcherid.com/rid/http://www.researcherid.com/rid/D-6016-2013</idno>
                  <affiliation ref="#struct-416617"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">José</forename>
                    <surname>Cupertino</surname>
                  </persName>
                  <idno type="halauthorid">1623230-0</idno>
                  <affiliation ref="#struct-577345"/>
                </author>
              </analytic>
              <monogr>
                <idno type="halJournalId" status="VALID">124287</idno>
                <idno type="issn">2076-3263</idno>
                <title level="j">Geosciences</title>
                <imprint>
                  <publisher>MDPI</publisher>
                  <biblScope unit="volume">9</biblScope>
                  <biblScope unit="issue">5</biblScope>
                  <biblScope unit="pp">193</biblScope>
                  <date type="datePub">2019-05</date>
                  <date type="dateEpub">2019-05-28</date>
                </imprint>
              </monogr>
              <idno type="doi">10.3390/geosciences9050193</idno>
            </biblStruct>
          </sourceDesc>
          <profileDesc>
            <langUsage>
              <language ident="en">English</language>
            </langUsage>
            <textClass>
              <keywords scheme="author">
                <term xml:lang="en">ocean acidification</term>
                <term xml:lang="en">gas seeps</term>
                <term xml:lang="en">gas hydrates</term>
              </keywords>
              <classCode scheme="halDomain" n="sdu.stu">Sciences of the Universe [physics]/Earth Sciences</classCode>
              <classCode scheme="halTypology" n="ART">Journal articles</classCode>
              <classCode scheme="halOldTypology" n="ART">Journal articles</classCode>
              <classCode scheme="halTreeTypology" n="ART">Journal articles</classCode>
            </textClass>
            <abstract xml:lang="en">
              <p>Gas hydrate provinces occur in two sedimentary basins along Brazil’s continental margin: (1) The Rio Grande Cone in the southeast, and (2) the Amazon deep-sea fan in the equatorial region. The occurrence of gas hydrates in these depocenters was first detected geophysically and has recently been proven by seafloor sampling of gas vents, detected as water column acoustic anomalies rising from seafloor depressions (pockmarks) and/or mounds, many associated with seafloor faults formed by the gravitational collapse of both depocenters. The gas vents include typical features of cold seep systems, including shallow sulphate reduction depths (&lt;4 m), authigenic carbonate pavements, and chemosynthetic ecosystems. In both areas, gas sampled in hydrate and in sediments is dominantly formed by biogenic methane. Calculation of the methane hydrate stability zone for water temperatures in the two areas shows that gas vents occur along its feather edge (water depths between 510 and 760 m in the Rio Grande Cone and between 500 and 670 m in the Amazon deep-sea fan), but also in deeper waters within the stability zone. Gas venting along the feather edge of the stability zone could reflect gas hydrate dissociation and release to the oceans, as inferred on other continental margins, or upward fluid flow through the stability zone facilitated by tectonic structures recording the gravitational collapse of both depocenters. The potential quantity of venting gas on the Brazilian margin under different scenarios of natural or anthropogenic change requires further investigation. The studied areas provide natural laboratories where these critical processes can be analyzed and quantified</p>
            </abstract>
          </profileDesc>
        </biblFull>
      </listBibl>
    </body>
    <back>
      <listOrg type="structures">
        <org type="institution" xml:id="struct-527275" status="INCOMING">
          <orgName>Department of Biology and Environmental Science, Linnaeus University</orgName>
          <desc>
            <address>
              <country key="SE"/>
            </address>
          </desc>
        </org>
        <org type="institution" xml:id="struct-577345" status="VALID">
          <idno type="IdRef">030724309</idno>
          <idno type="ISNI">0000000121669094</idno>
          <idno type="ROR">https://ror.org/025vmq686</idno>
          <idno type="Wikidata">Q600634</idno>
          <orgName>Pontifícia Universidade Católica do Rio Grande do Sul = Pontifical Catholic University of Rio Grande do Sul [Brazil]</orgName>
          <orgName type="acronym">PUC-RS</orgName>
          <date type="start">1931-01-01</date>
          <desc>
            <address>
              <addrLine>Avenida Ipiranga 6681, Partenon, Porto Alegre, Rio Grande do Sul</addrLine>
              <country key="BR"/>
            </address>
            <ref type="url">https://www.pucrs.br</ref>
          </desc>
        </org>
        <org type="laboratory" xml:id="struct-239385" status="VALID">
          <idno type="ISNI">0000 0000 9888 6911</idno>
          <idno type="RNSR">200816914E</idno>
          <idno type="ROR">https://ror.org/05xtktk35</idno>
          <orgName>Géoazur</orgName>
          <orgName type="acronym">GEOAZUR 7329</orgName>
          <date type="start">2012-01-01</date>
          <desc>
            <address>
              <addrLine>250 rue Albert Einstein, Sophia Antipolis 06560 VALBONNE</addrLine>
              <country key="FR"/>
            </address>
            <ref type="url">http://geoazur.oca.eu</ref>
          </desc>
          <listRelation>
            <relation name="UMR7329" active="#struct-300045" type="direct"/>
            <relation active="#struct-302144" type="direct"/>
            <relation active="#struct-1039632" type="direct"/>
            <relation name="UMR7329" active="#struct-441569" type="direct"/>
            <relation name="UR082" active="#struct-451860" type="direct"/>
          </listRelation>
        </org>
        <org type="laboratory" xml:id="struct-155113" status="INCOMING">
          <orgName>Departamento de Geologia, LAGEMAR</orgName>
          <desc>
            <address>
              <country key="BR"/>
            </address>
          </desc>
          <listRelation>
            <relation active="#struct-218457" type="direct"/>
          </listRelation>
        </org>
        <org type="institution" xml:id="struct-565209" status="INCOMING">
          <orgName>Centro de Estudos de Geologia Costeira e Oceânica</orgName>
          <desc>
            <address>
              <addrLine>Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre 91501-970, Brazil</addrLine>
              <country key="BR"/>
            </address>
          </desc>
        </org>
        <org type="institution" xml:id="struct-416617" status="INCOMING">
          <orgName>Petrobras EGP-EXP</orgName>
          <desc>
            <address>
              <addrLine>Rio de Janeiro</addrLine>
              <country key="BR"/>
            </address>
          </desc>
        </org>
        <org type="institution" xml:id="struct-300045" status="VALID">
          <idno type="IdRef">029349265</idno>
          <idno type="ISNI">0000 0001 2154 1736</idno>
          <idno type="ROR">https://ror.org/04kdfz702</idno>
          <idno type="Wikidata">Q3152437</idno>
          <orgName>Institut national des sciences de l'Univers</orgName>
          <orgName type="acronym">INSU - CNRS</orgName>
          <date type="start">2007-04-19</date>
          <desc>
            <address>
              <addrLine>INSU-CNRS3 rue Michel-Ange, 75794 Paris Cedex 16</addrLine>
              <country key="FR"/>
            </address>
            <ref type="url">https://www.insu.cnrs.fr</ref>
          </desc>
        </org>
        <org type="institution" xml:id="struct-302144" status="VALID">
          <orgName>Observatoire de la Côte d'Azur</orgName>
          <desc>
            <address>
              <country key="FR"/>
            </address>
          </desc>
          <listRelation>
            <relation active="#struct-1039632" type="direct"/>
          </listRelation>
        </org>
        <org type="regroupinstitution" xml:id="struct-1039632" status="VALID">
          <idno type="IdRef">241035694</idno>
          <idno type="ROR">https://ror.org/019tgvf94</idno>
          <orgName>Université Côte d'Azur</orgName>
          <orgName type="acronym">UniCA</orgName>
          <date type="start">2020-01-01</date>
          <desc>
            <address>
              <addrLine>Parc Valrose, 28, avenue Valrose 06108 Nice Cedex 2</addrLine>
              <country key="FR"/>
            </address>
            <ref type="url">https://univ-cotedazur.fr</ref>
          </desc>
        </org>
        <org type="regroupinstitution" xml:id="struct-441569" status="VALID">
          <idno type="IdRef">02636817X</idno>
          <idno type="ISNI">0000000122597504</idno>
          <idno type="ROR">https://ror.org/02feahw73</idno>
          <orgName>Centre National de la Recherche Scientifique</orgName>
          <orgName type="acronym">CNRS</orgName>
          <date type="start">1939-10-19</date>
          <desc>
            <address>
              <country key="FR"/>
            </address>
            <ref type="url">https://www.cnrs.fr/</ref>
          </desc>
        </org>
        <org type="institution" xml:id="struct-451860" status="VALID">
          <orgName>Institut de Recherche pour le Développement</orgName>
          <orgName type="acronym">IRD [Occitanie]</orgName>
          <desc>
            <address>
              <addrLine>911 avenue Agropolis,BP 6450134394 Montpellier cedex 5</addrLine>
              <country key="FR"/>
            </address>
            <ref type="url">https://occitanie.ird.fr/</ref>
          </desc>
        </org>
        <org type="institution" xml:id="struct-218457" status="VALID">
          <idno type="ISNI">0000 0001 2184 6919</idno>
          <idno type="ROR">https://ror.org/02rjhbb08</idno>
          <orgName>Universidade Federal Fluminense [Rio de Janeiro]</orgName>
          <orgName type="acronym">UFF</orgName>
          <date type="start">1965-01-01</date>
          <desc>
            <address>
              <addrLine>Rua Miguel de Frias, 9 - Icaraí, Niterói - RJ, 24220-008</addrLine>
              <country key="BR"/>
            </address>
            <ref type="url">http://www.uff.br/</ref>
          </desc>
        </org>
      </listOrg>
      <listOrg type="projects">
        <org type="europeanProject" xml:id="projeurop-180491" status="VALID">
          <idno type="number">656821</idno>
          <idno type="program">H2020-MSCA-IF-2014</idno>
          <idno type="call">H2020-MSCA-IF-2014</idno>
          <orgName>SEAGAS</orgName>
          <desc>Multi-disciplinary Comparison of Fluid Venting from Gas Hydrate Systems on the Mediterranean and Brazilian Continental Margins over Glacial-Interglacial Timescales</desc>
          <date type="start">2016-04-30</date>
          <date type="end">2020-04-28</date>
        </org>
      </listOrg>
    </back>
  </text>
</TEI>