<?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>S1405-33222021000100007</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2021v73n1a160820</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracterización espacio-temporal de la distribución del arsénico en un acuífero kárstico en el sur del Estado de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Spatio-temporal characterization of arsenic distribution in a karst aquifer in the south of the State of Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Burgos]]></surname>
<given-names><![CDATA[Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gárfias]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martel]]></surname>
<given-names><![CDATA[Richard]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salas-García]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de México Instituto Interamericano de Tecnología y Ciencias del Agua ]]></institution>
<addr-line><![CDATA[Toluca Edo. México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Institut National de la Recherche Scientifique  ]]></institution>
<addr-line><![CDATA[Québec ]]></addr-line>
<country>Canada</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Toluca Edo. México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>73</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222021000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222021000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222021000100007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Diversidad de factores antropogénicos, geológicos y climáticos están relacionados con la conformación de las propiedades fisicoquímicas del agua .subterránea en una zona específica, los cuales deben de ser estudiados utilizando los enfoques adecuados. Para lograrlo, el objetivo principal de esta investigación estuvo dirigido a evaluar la .situación actual del recurso, enfatizando en la individualización de los principales factores que determinan su evolución espacio temporal en los municipios de Ixtapan de la Sal y Tonatico. El enfoque metodológico utilizado consistió en la combinación de técnicas de análisis hidroquímico, estadístico multivariado y geoestadístico, aplicadas a los parámetros fisicoquímicos medidos en fuentes termales, no termales, superficiales y pozos. Para 2015 y 2019, los resultados muestran que dos tipos de agua predominan: Ca2+-HCO3- y Na+-Cl-. Un tercer grupo, Ca2+-Mg2+-Cl-, evidencia procesos de mezcla entre aguas termales y no termales. Adicionalmente, la disolución de halita, minerales carbonatados (dolomita y calcita) y de sulfato de magnesio es predominante en la conformación iónica mayoritaria. El Análisis de componentes principales confirma dos procesos de importancia: (1) salinidad y (2) alcalinidad, relacionados a factores geogénicos y antropogénicos. La modelación geoestadística, realizada por el kriging ordinario, muestra que la calidad del agua decrece en dirección sur-oeste hacia el nor-este, involucrando al arsénico como principal limitante de calidad. Puede concluirse que un abordaje combinado, que incluya análisis hidroquímico y técnicas estadísticas, ofrece una alternativa viable para el estudio de la evolución fisicoquímica del agua subterránea, cuya implementación puede ser extrapolable a acuíferos de similar naturaleza.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Diversity of anthropogenic, geological and climatic factors are related to the conformation of the physicochemical properties of groundwater in a specific area, which should be studied using appropriate approaches. To achieve this, the main objective of this research was aimed at assessing the current situation of the resource emphasizing the individualization of the main factors that determine its temporal-space evolution in the municipalities of Ixtapan de la Sal and Tonatico. The methodological approach used consisted of a combination of hydrochemical, multivariate statistical and geostatistical analysis techniques, applied to the physicochemical parameters measured in thermal, non-thermal, surface sources and wells. For 2015 and 2019, the results show that two types of water predominate: Ca2+-HCO3- and Na+-Cl-. A third group, Ca2+-Mg2+-Cl-, evidences mixing processes between thermal and non-thermal waters. Additionally, the dissolution of halite, carbonate minerals (dolomite and calcite) and magnesium sulfate is predominant in the majority ionic conformation. Principal components analysis confirms two important processes: (1) salinity and (2) alkalinity, related to geogenic and anthropogenic factors. The geostatistical modeling, carried out by ordinary kriging, shows that water quality decreases in a south-west to north-east direction, involving arsenic as the main quality limitation factor. It can be concluded that a combined approach, which includes hydrochemical analysis and statistical techniques, offers a viable alternative for the study of the physicochemical evolution of groundwater, the implementation of which can be extrapolated to aquifers of a similar nature.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Geoestadística]]></kwd>
<kwd lng="es"><![CDATA[Análisis de componentes principales]]></kwd>
<kwd lng="es"><![CDATA[Arsénico]]></kwd>
<kwd lng="es"><![CDATA[hidrogeoquímica]]></kwd>
<kwd lng="es"><![CDATA[Ixtapan de la Sal]]></kwd>
<kwd lng="es"><![CDATA[Tonatico]]></kwd>
<kwd lng="en"><![CDATA[Geostatistics]]></kwd>
<kwd lng="en"><![CDATA[Principal Components Analysis]]></kwd>
<kwd lng="en"><![CDATA[Arsenic]]></kwd>
<kwd lng="en"><![CDATA[Hydrogeochemistry]]></kwd>
<kwd lng="en"><![CDATA[Ixtapan de la Sal]]></kwd>
<kwd lng="en"><![CDATA[Tonatico]]></kwd>
</kwd-group>
</article-meta>
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