<?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>0120-0283</journal-id>
<journal-title><![CDATA[Boletín de Geología]]></journal-title>
<abbrev-journal-title><![CDATA[bol.geol.]]></abbrev-journal-title>
<issn>0120-0283</issn>
<publisher>
<publisher-name><![CDATA[Universidad Industrial de Santander]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-02832019000100015</article-id>
<article-id pub-id-type="doi">10.18273/revbol.v41n1-2019001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio petrográfico y posibles fuentes de los clastos básales de la Formación San Cayetano hacia el sur del Cinturón Plegado de San Jacinto, norte de Colombia]]></article-title>
<article-title xml:lang="en"><![CDATA[Petrographic study and possible sources of the San Cayetano formation basal clasts to the south of the San Jacinto fold belt, north of Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva-Arias]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Páez-Acuña]]></surname>
<given-names><![CDATA[Liliana Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Gutiérrez]]></surname>
<given-names><![CDATA[Pedro David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rincón-Martínez]]></surname>
<given-names><![CDATA[Daniel Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Colombiano del Petróleo, ECOPETROL S.A  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Industrial de Santander  ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<volume>41</volume>
<numero>1</numero>
<fpage>15</fpage>
<lpage>28</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-02832019000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-02832019000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-02832019000100015&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se considera que los clastos basales de la Formación San Cayetano en el Cinturón Plegado de San Jacinto (CPSJ) evidencian parte de los eventos tectónicos asociados a la interacción de la margen de Sur América con un arco magmático intraoceánico de la Placa Caribe. Dichos clastos provienen del desmantelamiento de un arco intra-oceánico (88-73 Ma), y de la acreción de éste arco al margen continental suramericano; por lo que aportan al entendimiento de la tectónica post-colisional del Caribe Sur. Este estudio está enfocado en el análisis de la diversidad litológica de los clastos en los niveles conglomeráticos basales de la Formación San Cayetano, con el objeto de establecer su fuente y apoyar su procedencia respecto a la configuración de los antiguos sistemas magmáticos existentes en el Caribe colombiano. Los clastos basales al Sur del Alto de Magangué contienen clastos ígneos de afinidad máfica (basaltos con y sin vacuolas, y gabros) y clastos metamórficos (serpentinitas, ortogneis y anfibolitas) de un protolito ultramáfico-máfico. Los clastos de la Formación San Cayetano (Paleógeno Inferior) están relacionados tectónicamente con un ambiente de Arco, que evidencian rápida erosión y un mínimo efecto de transporte (No Disectado a Disectado); por lo que, dichos clastos provienen de fuentes próximas al CPSJ, con una configuración tectónica similar al actual margen NW del Caribe colombiano.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT It is considered that the basal clasts of the San Cayetano Formation in the San Jacinto Fold Belt (CPSJ) reveal part of the tectonic events related to the South American margin interaction with an intraoceanic magmatic arc of the Caribbean Plate. These clasts come from an intra-oceanic arch dismantling (88-73 Ma), and from arch accretion to the South American continental margin; therefore they contribute to the South Caribbean post-collisional tectonics understanding. This study is focused on clasts lithological diversity analysis in the San Cayetano Formation basal conglomerate levels, in order to establish its source and support its origin respecting to old magmatic systems configuration existing in the Colombian Caribbean. The basal clasts at the south of Magangué High contain mafic affinity igneous clasts (basalts with and without vacuoles, and gabros) and metamorphic clasts (serpentinites, ortogneis and amphibolites) of an ultramafic-mafic protolith. The San Cayetano Formation clasts (Lower Paleogene) are tectonically related to an Arc environment, revealing rapid erosion and a minimal transport effect (Not Dissected to Dissected); therefore, these clasts come from sources close to the CPSJ, with a similar tectonic configuration to the current NW Colombian Caribbean margin.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Clastos]]></kwd>
<kwd lng="es"><![CDATA[Formación San Cayetano]]></kwd>
<kwd lng="es"><![CDATA[Cinturón plegado de San Jacinto]]></kwd>
<kwd lng="es"><![CDATA[Alto de Magangué]]></kwd>
<kwd lng="en"><![CDATA[Clasts]]></kwd>
<kwd lng="en"><![CDATA[San Cayetano Formation]]></kwd>
<kwd lng="en"><![CDATA[San Jacinto Fold Belt]]></kwd>
<kwd lng="en"><![CDATA[Magangué High]]></kwd>
</kwd-group>
</article-meta>
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