<?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>1794-6190</journal-id>
<journal-title><![CDATA[Earth Sciences Research Journal]]></journal-title>
<abbrev-journal-title><![CDATA[Earth Sci. Res. J.]]></abbrev-journal-title>
<issn>1794-6190</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1794-61902022000100047</article-id>
<article-id pub-id-type="doi">10.15446/esrj.v26n1.92419</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Ore-controlling structures and geostatistical determination of ore-shoots in shear zone hosted lode gold type deposits, El Bagre-Antioquia, Colombia]]></article-title>
<article-title xml:lang="es"><![CDATA[Controles estructurales de mena y determinaciones geoestadísticas de zonas de alta ley en depósitos vetiformes hospedados en zonas de cizalla, El Bagre-Antioquia, Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Naranjo Sierra]]></surname>
<given-names><![CDATA[Edwin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Operadora Minera S.A.S  ]]></institution>
<addr-line><![CDATA[Medellin ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<volume>26</volume>
<numero>1</numero>
<fpage>47</fpage>
<lpage>54</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1794-61902022000100047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1794-61902022000100047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1794-61902022000100047&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Shear zone hosted lode gold type deposits at the El Bagre district, Colombia, are the only known Permian gold mineralization in Colombia Andes. Multiple fluid flows are inferred in the formation of these veins, probably synchronous to several shearing episodes. Nonetheless, orientation and control of high-grade gold concentrations (i.e., ore-shoots) are poorly known. In the El Bagre district, three main lode systems are studied with N-NNW-S-SSE orientation and variable dips (40 to 80° to the La Ye and 30 to 45° to Mangos and Cordero). Geostatistical analyses with ellipses determined by variogram modelling, reveal the anisotropy of gold mineralization and the orientation of ore-shoots. The long axes of the anisotropy ellipses trend SSE, certainly related to sinistral shearing and NNW-SSE faulting during D3 deformation event. This study evidences the use of a simple and effective tool for lode gold deposits exploration.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los depósitos vetiformes de oro hospedados en zonas de cizalla en El Bagre, al noreste del departamento de Antioquia, son la única evidencia de mineralización de oro Pérmica hasta la fecha en los Andes Colombianos. Se han inferido múltiples flujos de fluidos en la formación de estas vetas, probablemente sincrónicos a varios episodios de cizallamiento. No obstante, la orientación y el control de los altos tenores (ore-shoots) de oro son pobremente conocidas. En el distrito El Bagre, tres sistemas de veta principales fueron estudiados con una orientación N-NNW-S-SSE y con buzamientos variables (40 a 80° para La Ye y de 30 a 45° para Mangos y Cordero). Los análisis geoestadísticos con elipses determinadas por el modelamiento variográfico, revelan la anisotropia de la mineralización de oro y la orientación de los ore-shoots. Los ejes principales de los elipsoides de anisotropia tienden al SSE, ciertamente relacionados con el cizallamiento si-nestral y el fallamiento NNW durante el evento de deformación D3. Este estudio evidencia el uso de una herramienta simple y efectiva para la exploración de depósitos de oro vetiformes.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[El Bagre]]></kwd>
<kwd lng="en"><![CDATA[Ore-Shoots]]></kwd>
<kwd lng="en"><![CDATA[Geostatistics]]></kwd>
<kwd lng="en"><![CDATA[Lode gold deposits]]></kwd>
<kwd lng="es"><![CDATA[El Bagre]]></kwd>
<kwd lng="es"><![CDATA[Altos tenores]]></kwd>
<kwd lng="es"><![CDATA[Geoestadística]]></kwd>
<kwd lng="es"><![CDATA[Depósitos vetiformes]]></kwd>
</kwd-group>
</article-meta>
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