<?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>1026-8774</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias geológicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. cienc. geol]]></abbrev-journal-title>
<issn>1026-8774</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1026-87742021000200086</article-id>
<article-id pub-id-type="doi">10.22201/cgeo.20072902e.2021.2.1596</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Anomalías y mecanismos de transporte de mercurio en un sistema hidrotermal asociado a fallas normales en Araró, Michoacán (occidente de México)]]></article-title>
<article-title xml:lang="en"><![CDATA[Mercury anomalies and transport mechanisms in a hydrothermal system associated with normal faults in Araró, Michoacán (western Mexico)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Martínez]]></surname>
<given-names><![CDATA[Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villanueva-Estrada]]></surname>
<given-names><![CDATA[Ruth Esther]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Martínez]]></surname>
<given-names><![CDATA[Rocío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Díaz]]></surname>
<given-names><![CDATA[Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Canet]]></surname>
<given-names><![CDATA[Carles]]></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 ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geofísica ]]></institution>
<addr-line><![CDATA[Morelia Mich]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Ciencias de la Atmósfera ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geofísica ]]></institution>
<addr-line><![CDATA[Ciudad de 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>38</volume>
<numero>2</numero>
<fpage>86</fpage>
<lpage>99</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1026-87742021000200086&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1026-87742021000200086&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1026-87742021000200086&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En este trabajo se infieren los mecanismos de transporte y movilidad del mercurio en el sistema geotérmico Araró-Simirao, que se asocian a un sistema de fallas de tipo normal y orientación general NE-SW, a través de la modelación hidrogeoquímica del Hg en agua y suelos y su relación con la concentración de Hg en el aire. Se realizó un muestreo de agua termal y suelos, y se comparó con las emanaciones de gases de mercurio elemental. Las especies predominantes de Hg en agua son Hg0(ac), HgCl2 y HgCl3-, aunque la abundancia de Hg0(ac) es menor con respecto a Hg2+. En suelo se encontraron minerales de alteración hidrotermal como barita y partículas con contenidos de Hg. De forma general, se deduce que los procesos geoquímicos que se llevan a cabo para el transporte de Hg entre los compartimentos ambientales agua, suelo y atmósfera son: volatilización, oxidación, complejación y depósito. El sistema hidrotermal a profundidad favorece el transporte de mercurio elemental en estado gaseoso, de probable origen magmático, hacia la superficie por las zonas de mayor permeabilidad, como es la falla Araró-Simirao; en su ascenso interacciona con el acuífero sub-superficial, enriqueciéndolo en Hg y formando complejos clorurados que son transportados en el medio acuoso. Al descargarse a la superficie el agua termal enriquecida en Hg, éste se volatiliza como Hg0(g) y permanece en la atmósfera o puede depositarse en los suelos aledaños a los manantiales, adhiriéndose a partículas de materia orgánica o arcillas y formando aureolas de anomalías de Hg en superficie. De acuerdo con la distribución espacial de estas aureolas, la zona más cercana a los fluidos geotérmicos (ascenso vertical de los gases) es la parte sur del sistema.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In this paper, we infer a mechanism for Hg transport and mobility in the Araró-Simirao geothermal system, which is associated with a normal fault system of general NE-SW orientation, through the hydrogeochemical modeling of Hg in water and soils and their relationship with the Hg concentration in the air. A sampling of thermal water and soils was carried out, and it was compared with gaseous elemental Hg emissions. The predominant Hg species in water are Hg0(aq), HgCl2 and HgCl3-, although the Hg0(aq) abundance is lower with respect to Hg2+. Hydrothermal alteration minerals such as barite and particles with Hg contents were found in the soil. In general, are inferred the geochemical processes involved in the Hg transport between the environmental compartments, water, soil, and atmosphere are volatilization, oxidation, complexation, and deposition. The deep hydrothermal system favors the transport of elemental gaseous mercury, of probable magmatic origin, to the surface through the areas with the highest permeability, such as the Araró-Simirao fault. In its ascent, the hydrothermal fluids interact with the subsurface aquifer, enriching the aquifer in Hg and forming chlorinated complexes that are transported in the aqueous medium. When thermal water enriched in Hg is discharged to the surface, the mercury volatilizes as Hg0(g) and remains in the atmosphere or can be deposited on the soils surrounding the springs, adhering to particles of organic matter or clays, and forming aureoles of Hg anomalies on the surface. According to the spatial distribution of the anomalies, the area closest to geothermal fluids (vertical rise of gases) is the southern part of the system.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[transporte de mercurio]]></kwd>
<kwd lng="es"><![CDATA[sistema hidrotermal]]></kwd>
<kwd lng="es"><![CDATA[modelación hidrogeoquímica]]></kwd>
<kwd lng="es"><![CDATA[oxidación]]></kwd>
<kwd lng="es"><![CDATA[complejación]]></kwd>
<kwd lng="es"><![CDATA[volatilización]]></kwd>
<kwd lng="es"><![CDATA[Araró]]></kwd>
<kwd lng="es"><![CDATA[Michoacán]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="en"><![CDATA[mercury transport]]></kwd>
<kwd lng="en"><![CDATA[hydrothermal system]]></kwd>
<kwd lng="en"><![CDATA[hydrogeochemical modeling]]></kwd>
<kwd lng="en"><![CDATA[oxidation]]></kwd>
<kwd lng="en"><![CDATA[complexation]]></kwd>
<kwd lng="en"><![CDATA[volatilization]]></kwd>
<kwd lng="en"><![CDATA[Araró]]></kwd>
<kwd lng="en"><![CDATA[Michoacán]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
</kwd-group>
</article-meta>
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