<?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>S0012-73532021000200068</article-id>
<article-id pub-id-type="doi">10.15446/dyna.v88n217.88766</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Characterization of high-grade gold deposits in northeastern Antioquia-Colombia]]></article-title>
<article-title xml:lang="es"><![CDATA[Caracterización de yacimientos de oro de alto tenor del nordeste de Antioquia-Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Reyes]]></surname>
<given-names><![CDATA[Néstor Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Echeverry-Vargas]]></surname>
<given-names><![CDATA[Luver]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia Facultad de Minas Instituto de Minerales CIMEX]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>88</volume>
<numero>217</numero>
<fpage>68</fpage>
<lpage>74</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0012-73532021000200068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0012-73532021000200068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0012-73532021000200068&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Mineralogical characterization is a fundamental stage when designing and implementing metallurgical extraction processes. In the case of gold mining, knowing how the metal forms and its mineralogical associations is an essential tool when minimizing losses or designing processes. Northeast Antioquia has distinguished itself as one of the main gold producing areas in Colombia. Here, a characterization of different samples from this Colombian region was done using XRD, XRF, QUEMSCAN, SEM-EDX, fire assay, conventional cyanidation, and froth flotation tests. The analyses performed classify this deposit as &#8220;high grade,&#8221; with values up to 81 g/t of gold. Quartz is the most common mineral, followed by muscovite, pyrite, and potassium feldspar. Gold was found in the form of electrum associated with sulfide minerals, therefore, a conventional flotation process is proposed, with an average recovery of 90%.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La caracterización mineralógica es una etapa fundamental a la hora de diseñar e implementar procesos metalúrgicos de extracción; en el caso de la minería del oro, el conocer la forma de ocurrencia del metal y sus asociaciones mineralógicas es una herramienta fundamental cuando se quiere minimizar pérdidas o diseñar procesos. El nordeste del departamento de Antioquia se ha distinguido por ser una de las principales zonas de Colombia en cuanto a producción de oro se refiere. En el presente trabajo se realizó una caracterización de diferentes muestras provenientes de esta región colombiana utilizando DRX, FRX, QUEMSCAN, SEM-EDX, ensayo al fuego, cianuración convencional y pruebas de flotación espumante. Los análisis realizados clasifican estos yacimientos como de &#8220;alto tenor&#8221;, con valores hasta de 81 g/t de oro. El cuarzo es el mineral mayoritario seguido por la presencia de minerales como moscovita, pirita y feldespato potásico. La forma predominante del oro es el electrum asociado a sulfuros, por tanto, se propone un proceso de flotación convencional, con un promedio de recuperación de 90%.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[mineral characterization]]></kwd>
<kwd lng="en"><![CDATA[mercury pollution]]></kwd>
<kwd lng="en"><![CDATA[artisanal mining]]></kwd>
<kwd lng="en"><![CDATA[Colombia]]></kwd>
<kwd lng="en"><![CDATA[Antioquia]]></kwd>
<kwd lng="en"><![CDATA[gold]]></kwd>
<kwd lng="es"><![CDATA[caracterización de minerales]]></kwd>
<kwd lng="es"><![CDATA[contaminación por mercurio]]></kwd>
<kwd lng="es"><![CDATA[minería artesanal]]></kwd>
<kwd lng="es"><![CDATA[Colombia]]></kwd>
<kwd lng="es"><![CDATA[Antioquia]]></kwd>
<kwd lng="es"><![CDATA[oro]]></kwd>
</kwd-group>
</article-meta>
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