<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1026-8774</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias geológicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. cienc. geol]]></abbrev-journal-title>
<issn>1026-8774</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1026-87742023000100035</article-id>
<article-id pub-id-type="doi">10.22201/cgeo.20072902e.2023.1.1722</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Late Mississippian (early Serpukhovian) carbon isotope record of northern Laurussia: A proposal for the Viséan/ Serpukhovian boundary]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zhuravlev]]></surname>
<given-names><![CDATA[Andrey V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vevel]]></surname>
<given-names><![CDATA[Yadviga A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gruzdev]]></surname>
<given-names><![CDATA[Denis A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Erofeevsky]]></surname>
<given-names><![CDATA[Andrey V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Russian Academy of Sciences Komi SC UB Institute of Geology]]></institution>
<addr-line><![CDATA[Syktyvkar ]]></addr-line>
<country>Rusia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>40</volume>
<numero>1</numero>
<fpage>35</fpage>
<lpage>43</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1026-87742023000100035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1026-87742023000100035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1026-87742023000100035&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The fauna provincialism in the Viséan/Serpukhovian boundary interval led to the appearance of some problems with the tracing of this boundary with biostratigraphic methods. Therefore, it is important to determine auxiliary non-biostratigraphic markers of the boundary. The article is focused on the evaluation of the correlation potential of carbon isotope excursions near the Viséan/Serpukhovian boundary, with special attention to the northern Laurussia region. The biostratigraphically constrained carbon isotope record is revealed from the terminal Viséan - lower Serpukhovian (Mississippian) shelf successions of the northern Laurussia (six key sections located in the north of Urals and Cis-Urals, NE Europe). Onset of a negative excursion in the middle part of the Lochriea ziegleri conodont Zone (lower Serpukhovian) shows amplitude of 1-2&#8240; and high spatial stability, and can be used as a stratigraphic marker in regional and global correlations.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El provincialismo faunístico en el intervalo del límite Viseano/Serpukhoviano provocó la aparición de algunos problemas en el trazado de este límite con métodos bioestratigráficos. Por lo tanto, es importante determinar marcadores auxiliares no bioestratigráficos de este límite. El artículo se centra en la evaluación del potencial de correlación de las excursiones de isótopos de carbono cerca del límite Viseano/Serpukhoviano, con especial atención a la región norte de Laurussia. Se reporta el registro de isotópico de carbono para secciones con control bioestatigráfico de las sucesiones de la plataforma del Viseano superior-Serpukhoviano inferior (Mississipiano) del norte de Laurussia (seis secciones de referencia ubicadas en el norte de los Urales y Cis-Urales, NE de Europa). El inicio de una excursión negativa en la parte media de la zona de conodontos de Lochriea ziegleri (Serpukhoviano inferior) muestra una amplitud de 1-2&#8240; y una alta estabilidad espacial, y puede usarse como marcador estratigráfico en correlaciones regionales y globales.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Carbon isotope stratigraphy]]></kwd>
<kwd lng="en"><![CDATA[Viséan/Serpukhovian boundary]]></kwd>
<kwd lng="en"><![CDATA[Mississippian Carboniferous]]></kwd>
<kwd lng="en"><![CDATA[Laurussia]]></kwd>
<kwd lng="en"><![CDATA[Urals]]></kwd>
<kwd lng="es"><![CDATA[estratigrafía de isótopos de carbono]]></kwd>
<kwd lng="es"><![CDATA[límite Viseano/Serpukhoviano]]></kwd>
<kwd lng="es"><![CDATA[Mississippiano Carbonífero]]></kwd>
<kwd lng="es"><![CDATA[Laurussia]]></kwd>
<kwd lng="es"><![CDATA[Urales]]></kwd>
</kwd-group>
</article-meta>
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