<?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>0012-7353</journal-id>
<journal-title><![CDATA[DYNA]]></journal-title>
<abbrev-journal-title><![CDATA[Dyna rev.fac.nac.minas]]></abbrev-journal-title>
<issn>0012-7353</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0012-73532021000100062</article-id>
<article-id pub-id-type="doi">10.15446/dyna.v88n216.86210</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Crude oils from Austral and Golfo San Jorge Basins. Similarity and differences based on biomarker ratios]]></article-title>
<article-title xml:lang="es"><![CDATA[Crudos de las cuencas Austral y del Golfo San Jorge. Similitudes y diferencias basadas en relaciones de biomarcadores]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tomas]]></surname>
<given-names><![CDATA[Germán Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[Walter]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acuña]]></surname>
<given-names><![CDATA[Adrián Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación y Transferencia de la Provincia de Santa Cruz  ]]></institution>
<addr-line><![CDATA[Río Gallegos ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Tecnológica Nacional Facultad Regional Santa Cruz ]]></institution>
<addr-line><![CDATA[Río Gallegos ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Yacimientos Petrolíferos Fiscales-Tecnología  ]]></institution>
<addr-line><![CDATA[Ensenada ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>88</volume>
<numero>216</numero>
<fpage>62</fpage>
<lpage>68</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0012-73532021000100062&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0012-73532021000100062&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0012-73532021000100062&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Biomarker profiles are characteristic of oils. The goal of this study was to evaluate the biomarkers in oil samples using geochemical analysis. Oil samples were obtained from Austral Basin and Golfo San Jorge Basins. Specifically, aliphatic and aromatic fractions were analyzed by Gas Chromatography coupled to Mass Spectrometry. Biomarker ratios were calculated for isoprenoids, terpanes and steranes to correlate the organic matter precursor, deposition environment and source rock to differentiate distinct crude oil sources. Based on the specific parameters, crude from the Austral Basin appears to have been generated from organic matter types II-III (mixed), in deposition environments with moderate oxygen concentration, associated with a siliciclastic lithology and a moderate to high thermal maturity. On the contrary, the crude oils from the Golfo San Jorge Basin displayed biomarkers profiles characteristics of a type II (marine) kerogen, corresponding to an anoxic deposition environment, carbonated lithology and low thermal maturity.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los perfiles de biomarcadores son característicos de cada crudo. El objetivo de este estudio fue evaluar los biomarcadores en muestras de petróleo mediante análisis geoquímicos. Se obtuvieron muestras de las cuencas Austral y del Golfo San Jorge. Se analizaron las fracciones alifáticas y aromáticas por cromatografía de gases acoplada a espectrometría de masas. Se calcularon relaciones de biomarcadores a partir de isoprenoides, terpanos y esteranos para sugerir la materia orgánica precursora, el ambiente de depositación y roca madre para diferenciar las distintas fuentes de petróleo. Según los parámetros específicos, el crudo de la cuenca Austral pudo generarse a partir de materia orgánica tipo II-III, en ambientes de deposición con concentración moderada de oxígeno, litología siliciclástica y madurez térmica moderada a alta. Por el contrario, los crudos de la cuenca del Golfo San Jorge mostraron características asociadas a un kerógeno tipo II, en un entorno anóxico, litología carbonatada y baja madurez térmica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[deposition environment]]></kwd>
<kwd lng="en"><![CDATA[thermal maturity]]></kwd>
<kwd lng="en"><![CDATA[organic material]]></kwd>
<kwd lng="en"><![CDATA[mother rock lithology]]></kwd>
<kwd lng="es"><![CDATA[ambiente de deposición]]></kwd>
<kwd lng="es"><![CDATA[madurez térmica]]></kwd>
<kwd lng="es"><![CDATA[materia orgánica]]></kwd>
<kwd lng="es"><![CDATA[litología de la roca madre]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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