<?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>1405-3322</journal-id>
<journal-title><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Soc. Geol. Mex]]></abbrev-journal-title>
<issn>1405-3322</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Geológica Mexicana A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-33222023000100010</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2023v75n1a181122</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Las partículas magnéticas como indicadoras de contaminación en el Valle de Aburrá (Colombia)]]></article-title>
<article-title xml:lang="en"><![CDATA[Magnetic particles as pollution indicators at the Aburrá valley (Colombia)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Duque]]></surname>
<given-names><![CDATA[Alexander]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bautista]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cejudo]]></surname>
<given-names><![CDATA[Rubén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cervantes-Solano]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Goguitchaichvili]]></surname>
<given-names><![CDATA[Avto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geofísica Centro de Investigaciones en Geografía Ambiental]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>75</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222023000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222023000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222023000100010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En el presente trabajo se reportan los resultados de un estudio de magnetismo ambiental realizado en el Área Metropolitana del Valle de Aburrá (Colombia) con el objetivo de determinar la variación espacial de la contaminación en la zona urbana. Se diseñó un muestreo bidimensional en el que se definieron 99 sitios de muestreo, cada uno de los sitios fue georreferenciado y descrito por factores categóricos de uso de suelo, jerarquía vial, superficie vial, grupo de suelo o unidad geológica, especie vegetal recolectada y ciudad o municipio. En total se recolectaron 307 muestras ambientales de las cuales, 110 fueron de suelo urbano superficial, 99 de polvo urbano y 98 hojas de plantas de ornato público. Se emplearon técnicas de magnetismo de rocas para determinar la naturaleza de los minerales magnéticos presentes en las muestras. Se realizó un análisis de varianza no paramétrico para relacionar los valores de los parámetros magnéticos con los factores categóricos y revelar las posibles fuentes de las partículas magnéticas. Posteriormente, mediante el factor de aumento magnético en las muestras de polvo y suelo superficial, se definieron los valores de referencia de la contaminación específicos para cada zona y cada tipo de muestra. A partir de los valores calculados y georreferenciados se diseñaron mapas que muestran modelos descriptivos de la contaminación ambiental para cada área urbana según el tipo de muestra ambiental y los parámetros magnéticos. Los resultados revelan que la señal magnética en los sitios con mayor concentración de minerales magnéticos es dominada por minerales ferrimagnéticos de origen antrópico. Los análisis no paramétricos de la varianza muestran que una mayor concentración relativa de estos minerales tiene una fuerte relación con la jerarquía vial y en menor grado con usos de suelo. Los mapas demuestran que la mayor parte de la superficie urbana estudiada presenta algún nivel de contaminación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This paper reports the results of an environmental magnetism research carried out with the main objective of determining the spatial variation of pollution in the urban area of Metropolitan Area of the Aburrá Valley (Colombia). A two-dimensional sampling was designed in which 99 sampling sites were defined, each site was georeferenced and described by categorical factors of land use, road hierarchy, road surface, soil group or geological unit, plant species collected and city or municipality. A total of 307 environmental samples were collected, of which 110 were of urban surface soil, 99 of urban dust and 98 leaves of public ornamental plants. Rock magnetism techniques were performed to determine the nature of the magnetic minerals present in the samples. A non-parametric analysis of variance was made to relate the magnetic parameter values to the categorical factors and reveal the possible sources of the magnetic particles. After that, using the magnetic magnification factor in the dust and surface soil samples, the area and sample zone specific contamination reference values were defined. From the calculated and geo-referenced values, maps were designed showing descriptive models of the environmental contamination for each urban area according to the nature of environmental sample and magnetic parameters. The results reveal that the magnetic signal in the sites with the highest concentration of magnetic minerals is dominated by ferrimagnetic minerals of anthropogenic origin. Non-parametric analyses of variance show that a higher relative concentration of these minerals has a strong relationship with road hierarchy and a lesser degree with land uses. The maps show that most of the urban area studied has some level of contamination.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[magnetismo ambiental]]></kwd>
<kwd lng="es"><![CDATA[geoestadística]]></kwd>
<kwd lng="es"><![CDATA[polvos urbanos]]></kwd>
<kwd lng="es"><![CDATA[contaminación urbana]]></kwd>
<kwd lng="es"><![CDATA[uso de suelo]]></kwd>
<kwd lng="es"><![CDATA[jerarquía vial]]></kwd>
<kwd lng="en"><![CDATA[environmental magnetism]]></kwd>
<kwd lng="en"><![CDATA[geostatistics]]></kwd>
<kwd lng="en"><![CDATA[urban dusts]]></kwd>
<kwd lng="en"><![CDATA[urban pollution]]></kwd>
<kwd lng="en"><![CDATA[land use]]></kwd>
<kwd lng="en"><![CDATA[road hierarchy]]></kwd>
</kwd-group>
</article-meta>
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