<?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>1405-3322</journal-id>
<journal-title><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Soc. Geol. Mex]]></abbrev-journal-title>
<issn>1405-3322</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Geológica Mexicana A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-33222023000300109</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2023v75n3a301023</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estratigrafía del Grupo Sierra Madre en Chiapas y su hipotético potencial petrolero]]></article-title>
<article-title xml:lang="en"><![CDATA[Stratigraphy of the Sierra Madre Group in Chiapas and its hypothetical petroleum potential]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Eguiluz y de Antuñano]]></surname>
<given-names><![CDATA[Samuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Than-Marchese]]></surname>
<given-names><![CDATA[Bruno Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camacho Ortegón]]></surname>
<given-names><![CDATA[Luis Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Martínez]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Pérez]]></surname>
<given-names><![CDATA[Luis Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,CDMX  ]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Ciencias y Artes de Chiapas Instituto de Ciencias Biológicas ]]></institution>
<addr-line><![CDATA[Tuxtla Gutiérrez Chiapas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Coahuila Centro de Investigación en Geociencias Aplicadas ]]></institution>
<addr-line><![CDATA[Nueva Rosita Coahuila de Zaragoza]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología Laboratorio de Carbonatos y Procesos Kársticos]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Secretaria de Medio Ambiente e Historia Natural Museo de Paleontología Eliseo Palacios Aguilera ]]></institution>
<addr-line><![CDATA[Tuxtla Gutiérrez Chiapas]]></addr-line>
<country>México</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>75</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222023000300109&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222023000300109&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222023000300109&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El Grupo Sierra Madre de Chiapas tiene informalidades en su nomenclatura estratigráfica que han sido transmitidas a través de la literatura geológica. Este trabajo describe las características de tres sucesiones litoestratigráficas que hacen comprensible la división tripartita del Grupo Sierra Madre. Una litología particular, que aquí se define sucesión El Chango, separa las sucesiones Cantelhá y Cintalapa para integrar a este grupo. Adicionalmente, la sucesión El Chango hace posible realizar una cartografía apropiada y su correlación permite interpretar la distribución regional de facies sedimentarias que presentan estas sucesiones. La epifluorescencia de rocas de la sucesión El Chango (Cenomaniano) exhibe compuestos orgánicos. Datos de pirólisis indican &#8275;0.22% de carbón orgánico total en roca carbonatada, su reflectancia equivalente es 0.7 y 1.0, que ubica a la roca en la ventana de generación del aceite y gas metagénico, los valores de S2 menores de 0.2 mg HC/g hacen cuestionable el bajo potencial de expulsión de hidrocarburos, por lo que se requieren análisis adicionales. La porosidad impregnada con asfalto en rocas del Grupo Sierra Madre sugiere la existencia de roca almacén, cubierta regionalmente por rocas pelíticas como sello y los cambios de facies y deformación indica la existencia de trampas potenciales. Los datos de este trabajo proponen explorar un play hipotético petrolero en esta región.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The Sierra Madre Group of Chiapas has informalities in its stratigraphic nomenclature that have been transmitted through geological literature. This work describes the characteristics of three lithostratigraphic successions that make the tripartite division of the Sierra Madre Group understandable. A particular lithology, which here is defined as the El Chango succession, separates the Cantelhá and Cintalapa successions to integrate this group. Additionally, the El Chango succession makes it possible to do an appropriate mapping and its correlation allows interpreting the regional distribution of sedimentary facies that these successions. Epifluorescence of rocks from the El Chango succession (Cenomanian) exhibits organic compounds. Pyrolysis data indicate &#8275;0.22% of total organic carbon in carbonate rock, its equivalent reflectance is 0.7 and 1.0, which places the rock in the generation window of metagenic oil and gas, S2 values less than 0.2 mg HC/g make the low hydrocarbon expulsion potential questionable, so additional analyzes are required. The porosity impregnated with asphalt in rocks of the Sierra Madre Group suggests the existence of reservoir rock, regionally covered by pelitic rocks as a seal, and the changes in facies and deformation indicate the existence of potential traps. The data from this work proposes to explore a hypothetical oil play in this region.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cenomaniano]]></kwd>
<kwd lng="es"><![CDATA[play]]></kwd>
<kwd lng="es"><![CDATA[facies sedimentarias]]></kwd>
<kwd lng="es"><![CDATA[pirólisis]]></kwd>
<kwd lng="en"><![CDATA[Cenomanian]]></kwd>
<kwd lng="en"><![CDATA[play]]></kwd>
<kwd lng="en"><![CDATA[sedimentary facies]]></kwd>
<kwd lng="en"><![CDATA[pyrolysis]]></kwd>
</kwd-group>
</article-meta>
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