<?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>0122-5383</journal-id>
<journal-title><![CDATA[CT&F - Ciencia, Tecnología y Futuro]]></journal-title>
<abbrev-journal-title><![CDATA[C.T.F Cienc. Tecnol. Futuro]]></abbrev-journal-title>
<issn>0122-5383</issn>
<publisher>
<publisher-name><![CDATA[Instituto Colombiano del Petróleo (ICP) - ECOPETROL S.A.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0122-53832016000200037</article-id>
<article-id pub-id-type="doi">10.29047/01225383.02</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Lithofacies analysis and depositional environment of the galembo member of la luna formation]]></article-title>
<article-title xml:lang="es"><![CDATA[Analisis de litofacies y ambiente de depósito del miembro galembo de la formación la luna]]></article-title>
<article-title xml:lang="pt"><![CDATA[Modelos de geração de hidrocarbonetos ao longo do depressão basal da zona de subducção andina no norte do equador e sul da colômbia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Casadiego-Quintero]]></surname>
<given-names><![CDATA[Efrain]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos-Reyes]]></surname>
<given-names><![CDATA[Carlos Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Industrial de Santander  ]]></institution>
<addr-line><![CDATA[Bucaramanga Santander]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>6</volume>
<numero>4</numero>
<fpage>37</fpage>
<lpage>56</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0122-53832016000200037&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0122-53832016000200037&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0122-53832016000200037&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The Cretaceous La Luna Formation at the Middle Magdalena Valley Basin is a classic shale-gas system in which the rock is the source, reservoir, and seal. It was deposited in a deep water marine environment with little oxygen in the sea floor. The Galembo Member comprises several lithofacies dominated by finegrained (clay- to- silt-size) particles. Five lithofacies are recognized based on mineralogy, fabric, fossil content and texture: (1) nonlaminated to slight laminated foraminifera wackestones, (2) moderate to well-laminated highly fossiliferous claystones rich in organic matter; (3) claystones with fossiliferous carbonate concretions with pyrite; (4) nonlaminated siliceous and fossiliferous claystones; (5) ash falls. Each facies contains abundant pyrite and phosphate. Carbonate concretions are also common. The fossil content shows a predominantly deep marine paleoenvironment of deposition. Minor changes can generate variations in the relative proportion of terrigenous material, precipitation of organic matter and diagenetic alterations. Its deposition is estimated to have occurred over a 25- m.y. period, and despite the variations in sublithofacies, sedimentation style remained remarkably similar throughout this span of time.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La Formación La Luna del Cretáceo en la Cuenca del Valle Medio del Magdalena es un sistema clásico de shale gas en el que la roca es fuente, reservorio y sello. Esta fue depositada en un ambiente marino de aguas profundas, con poca oxigenación en el fondo. El Miembro Galembo presenta litofacies dominadas por partículas (tamaño arcilla a limo) de grano fino. Cinco litofacies se reconocen según su mineralogía, fábrica, contenido fósil y textura: (1) wackestones con foraminíferos no laminados a ligeramente laminados, (2) arcillolitas muy fosilíferas y ricas en materia orgánica moderadamente a muy laminadas; (3) arcillolitas con concreciones de carbonato fosilíferas con pirita; (4) arcillolitas silíceas y fosilíferas no laminadas; (5) caídas de ceniza. Cada facies contiene abundante pirita y fosfato. Las concreciones de carbonato también son comunes. El contenido fósil revela un paleoambiente marino de deposición predominantemente profundo. Pequeños cambios pueden generar variaciones en la proporción relativa de material terrígeno, la precipitación de la materia orgánica y alteraciones diagenéticas. Su depositación se estima que se produjo sobre un periodo de 25-ma, y a pesar de las variaciones en sublitofacies, el estilo de sedimentación se mantuvo notablemente similar en todo este lapso de tiempo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo AFormação La Luna del Cretáceo na Bacia do Vale Médio do Magdalena é um sistema clássico de shale gas onde a rocha é fonte, reservatório e selo. A formação ficou depositada em um ambiente marinho de águas profundas, com pouca oxigenação no fundo. O Membro Galembo apresenta litofacies dominadas por partículas (tamanho argila a limo) de grão fino. Cinco litofacies são reconhecidas segundo a sua minerologia, fábrica, conteúdo fóssil e textura: (1) wackestones com foraminíferos não laminados a levemente laminados, (2) argillites muito fossilificas e ricas em matéria orgânica moderadamente a muito laminadas; (3) argillites com concreções de carbonato fossilificas com pirita; (4) argillites silíceas e fossilificas não laminadas; (5) quedas de cinza. Cada facies contém abundante pirita e fosfato. As concreções de carbonato também são comuns. O conteúdo fóssil revela um paleoambiente marinho de deposição predominantemente profundo. Pequenas mudanças podem gerar variações na proporção relativa de material terrígeno, a precipitação da matéria orgânica e alterações digenéticas. Estima-se que o seu depósito aconteceu sob um período de 25-ma, e apesar das variações em sublitofacies, o estilo de sedimentação se manteve significativamente similar neste intervalo de tempo.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Galembo Member]]></kwd>
<kwd lng="en"><![CDATA[La Luna Formation]]></kwd>
<kwd lng="en"><![CDATA[Shales]]></kwd>
<kwd lng="en"><![CDATA[Lithofacies]]></kwd>
<kwd lng="en"><![CDATA[Depositional environment]]></kwd>
<kwd lng="es"><![CDATA[Miembro Galembo]]></kwd>
<kwd lng="es"><![CDATA[Formación La Luna]]></kwd>
<kwd lng="es"><![CDATA[Shales]]></kwd>
<kwd lng="es"><![CDATA[Litofacies]]></kwd>
<kwd lng="es"><![CDATA[Ambiente de depósito]]></kwd>
<kwd lng="pt"><![CDATA[Membro Galembo]]></kwd>
<kwd lng="pt"><![CDATA[Formação La Luna]]></kwd>
<kwd lng="pt"><![CDATA[Shales]]></kwd>
<kwd lng="pt"><![CDATA[Litofacies]]></kwd>
<kwd lng="pt"><![CDATA[Ambiente de depósito]]></kwd>
</kwd-group>
</article-meta>
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