<?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>S1405-33222024000100008</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2024v76n1a220224</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Sources of organic matter elucidated through Pyr-GC-MS, and relation to basin scale events in the Pimienta Formation (Central Mexico)]]></article-title>
<article-title xml:lang="es"><![CDATA[Fuentes de materia orgánica dilucidadas mediante Pir-CG-EM, y su relación con eventos a escala de cuenca en la Formación Pimienta (Centro de México)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Colín-García]]></surname>
<given-names><![CDATA[María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gamprubí]]></surname>
<given-names><![CDATA[Antoni]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Núñez-Useche]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrizo]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León-Santiago]]></surname>
<given-names><![CDATA[Mayra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Correa-Metrio]]></surname>
<given-names><![CDATA[Alexander]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Enciso-Cárdenas]]></surname>
<given-names><![CDATA[Juan Josué]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentes-Guzmán]]></surname>
<given-names><![CDATA[Edith]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología ]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Técnica Aeroespacial Centro de Astrobiología ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Química ]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Geociencias ]]></institution>
<addr-line><![CDATA[Querétaro Qro]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Autónoma de Coahuila Centro de Investigación en Geociencias Aplicadas ]]></institution>
<addr-line><![CDATA[Nueva Rosita Coah]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Laboratorio Nacional de Geoquímica y Mineralogía  ]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>76</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222024000100008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222024000100008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222024000100008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The study of organic matter is essential for understanding the sedimentary and diagenetic processes that have occurred in a certain area. Sediments rich in organic matter with a vocation for producing hydrocarbons are of particular importance. Studies of organic matter in these environments help not only to determine their potential as hydrocarbon generators, but also contribute to the understanding of the processes that have occurred in the basin over time. In this study, the use of pyrolysis-gas chromatography-mass spectrometry (Pyr-GC-MS) is proposed to analyse the diversity of organic molecules contained in the sediments of the Pimienta Formation. This technique is versatile and, although destructive, allows rapid analysis of organic matter, in addition to the minimal quantities required for the study. Pyr-GC-MS allows functional groups to be determined; in this study 34 different moieties were identified. The use of this technique is perfectly complemented by Rock-Eval-pyrolysis and fluid inclusion studies, which allows greater detail of the origin of the molecules. The results of the Rock Eval Pyrolysis suggested that there were two types of kerogen: continental (Type III) and marine (Type II)]. Some samples contained organic matter of continental origin , while others contained organic matter of marine origin. Analysis of fluid inclusions suggested sedimentary-diagenetic and meteoric sources for fluids, as well as different types of interaction between them and the surrounding rocks. The use of Pyr-GC-MS allowed us to determine that the organic matter in all samples is a mixture of continental and marine sources, although their proportions vary with depth in the Pimienta Formation. These results are consistent with the geological evolution in the area and indicate episodes of different organic contributions in the basin.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El estudio de la materia orgánica es fundamental para comprender los procesos sedimentarios y diagenéticos que se han producido en una determinada zona. Tienen especial importancia los sedimentos ricos en materia orgánica con vocación productora de hidrocarburos. Los estudios de la materia orgánica en estos ambientes ayudan no sólo a determinar su potencial como generadora de hidrocarburos, .sino que también contribuyen al conocimiento de los procesos ocurridos en la cuenca a lo largo del tiempo. En este estudio se propone el uso de la pirólisis-cromatografía de gases-espectrometría de masas (Pir-CG-EM) para analizar la diversidad de moléculas orgánicas contenidas en los sedimentos de la Formación Pimienta. Esta técnica es versátil y, aunque destructiva, permite un análisis rápido de la materia orgánica, además las cantidades mínimas requeridas para el estudio. La Pir-CG-EM permite determinar grupos funcionales; en este estudio se identificaron 34 diferentes. El uso de esta técnica se complementa perjectamente con estudios como Pirólisis Rock-Eval y de inclusiones fluidas, permitiendo un mayor detalle del origen de las moléculas. Los resultados de la Pirólisis Rock Eval sugirieron que había dos tipos de kerógeno: continental (Tipo III) y marino (Tipo II); algunas muestras contenían materia orgánica de origen continentaly otras de origen marino. Alientras que los análisis de inclusiones fluidas sugieren fuentes sedimentarias-diagenéticasy meteóricas de fluidos y diferentes tipos de interacción entre estos y las rocas circundantes. El uso de Pir-CG-EM permitió determinar que la materia orgánica en todas las muestras es una mezcla dejuentes continentales y marinas, aunque sus proporciones varían con la profundidad en la Formación Pimienta. Estos resultados concuerdan bien con la evolución geológica de la zona e indican episodios de diferentes aportes orgánicos en la cuenca.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Pyr-GC-MS]]></kwd>
<kwd lng="en"><![CDATA[Pimienta Formation]]></kwd>
<kwd lng="en"><![CDATA[organic content]]></kwd>
<kwd lng="en"><![CDATA[fluid inclusions]]></kwd>
<kwd lng="es"><![CDATA[Pir-CG-EM]]></kwd>
<kwd lng="es"><![CDATA[Formación Pimienta]]></kwd>
<kwd lng="es"><![CDATA[contenido orgánico]]></kwd>
<kwd lng="es"><![CDATA[inclusiones fluidas]]></kwd>
</kwd-group>
</article-meta>
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