<?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>S0120-02832019000100151</article-id>
<article-id pub-id-type="doi">10.18273/revbol.v41nl-2019008</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Contribuciones geológicas al modelo conceptual geotérmico en la región de los volcanes Chiles - Cerro Negro (Colombia-Ecuador)]]></article-title>
<article-title xml:lang="en"><![CDATA[Geological contributions to the conceptual geothermal model in the region of the volcanoes Chiles - Cerro Negro (Colombia-Ecuador)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[Yohanna K.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[John J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia Facultad de Ciencias Departamento de Geociencias]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia Departamento de Geociencias y Medio Ambiente, Facultad de Minas ]]></institution>
<addr-line><![CDATA[Medellín ]]></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>151</fpage>
<lpage>171</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-02832019000100151&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-02832019000100151&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-02832019000100151&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se refina el modelo conceptual geotérmico del área del Complejo Volcánico Chiles - Cerro Negro (CVCCN), mediante la inclusión de detalles litológicos, geotécnicos y del sistema hidrológico. Se visitaron 21 sitios en su mayoría ubicados dentro del área de interés del Proyecto Geotérmico Binacional Tufiño Chiles - Cerro Negro. La petrografía y clasificación geoquímica se realizaron para cuatro muestras utilizando los diagramas K2O vs SiO2, SiO2 - FeOt/MgO, AFM y Na2O + K2O vs SiO2. La clasificación geotécnica de cinco sitios siguió el procedimiento del sistema de clasificación de macizos rocosos (RMR - Rock Mass Rating). Se encontró que la litología varía entre rocas duras (lavas andesíticas y dacíticas) y depósitos de naturaleza variable incluyendo derrubios, till, lahares y flujos piroclásticos. Los parámetros geotécnicos de los macizos rocosos presentan los siguientes rangos y valores medios: 90 &#8804; %RQD &#8804; 96; 52 &#8804; RMR &#8804; 77; 8,89 &#8804; &#963;  cm &#8804; 35,67; y -1,13 &#8804; &#963;  tm &lt; -0,11; RQD  mediana =92%; RMR  mediana =69%; &#963;  cm-mediana =22,87 MPa; y &#963;  tm-mediana =-0,494 MPa. Se estima que la porosidad y la permeabilidad en el área de estudio son moderadas a altas. Se concluye que la variabilidad litológica y estructural influencian la permeabilidad regional y local y que en general se favorece la circulación de fluidos acuosos entre las áreas de recarga y descarga del sistema geotérmico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT A preliminary conceptual geothermal model for the Chiles-Cerro Negro Volcanic Complex (CCNVC) is refined through the addition of details related to lithology, geotechnical properties, and hydrology of the system. A total of 21 sites were visited, mostly located within the area of the Tufiño-Chiles-Cerro Negro Binational Geothermal Project. The petrography and geochemical classification were obtained for four samples using the K2O vs SiO2, SiO2 - FeO/MgO, AFM and Na2O + K2O vs SiO2 diagrams. The geotechnical classification of five sites followed the Rock Mass Rating-RMR system. Lithology varies between hard rocks (andesite and dacite lavas) and unconsolidated deposits of variable nature, including talus, till, lahars and pyroclastic flows. The geotechnical parameters of rock masses vary in the following ranges and have median values: 90 &#8804; %RQD &#8804; 96; 52 &#8804; RMR &#8804; 77; 8,89 &#8804; &#963;  cm &#8804; 35,67; y -1,13 &#8804; &#963;  tm &lt; -0,11; RQD  median =92%; RMR  median =69%; &#963;  cm-median =22,87 MPa; y &#963;  tm-median =-0,494 MPa. The porosity and permeability of the study area exhibit moderate to high values. It is concluded that the varying lithology and structures influence the regional and local permeability, which favors circulation of aqueous fluids between the recharge and discharge areas of the geothermal system.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Complejo Volcánico Chiles-Cerro Negro]]></kwd>
<kwd lng="es"><![CDATA[sistema geotérmico]]></kwd>
<kwd lng="es"><![CDATA[modelo geotérmico conceptual]]></kwd>
<kwd lng="en"><![CDATA[Chiles-Cerro Negro Volcanic Complex]]></kwd>
<kwd lng="en"><![CDATA[geothermal system]]></kwd>
<kwd lng="en"><![CDATA[conceptual geothermal model]]></kwd>
</kwd-group>
</article-meta>
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