<?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>0016-7169</journal-id>
<journal-title><![CDATA[Geofísica internacional]]></journal-title>
<abbrev-journal-title><![CDATA[Geofís. Intl]]></abbrev-journal-title>
<issn>0016-7169</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geofísica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-71692023000400591</article-id>
<article-id pub-id-type="doi">10.22201/igeof.2954436xe.2023.62.4.1454</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Gold ore identification in Santa Catarina Gabbro using electrical resistivity tomography (ERT) and visualization of mineralization in three dimensions, São Sepé, Rio Grande do Sul, Brazil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lenhare]]></surname>
<given-names><![CDATA[Bruno Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreira]]></surname>
<given-names><![CDATA[César Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ilha]]></surname>
<given-names><![CDATA[Lenon Melo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Estadual Paulista Department of Geology ]]></institution>
<addr-line><![CDATA[Rio Claro SP]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal do Pampa Centro de Ciências Exatas e da Terra ]]></institution>
<addr-line><![CDATA[Caçapava do Sul RS]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>62</volume>
<numero>4</numero>
<fpage>591</fpage>
<lpage>606</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-71692023000400591&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-71692023000400591&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-71692023000400591&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This work presents the geological-geophysical characterization of a probable occurrence of gold in Santa Catarina Gabbro, in São Sepé region, Rio Grande do Sul state, southern Brazil. Previous works have indicated the presence of gold in the region in current sediments geochemical prospecting campaigns and suggests that the source area would be the Santa Catarina Gabbro. To investigate over this probable occurrence of gold, geological and structural surveys were conducted, followed by the acquisition of geophysical information using the DC-resistivity and IP methods, with the dipole-dipole array. The geophysical data were processed in 2D inversion and then interpolated to allow the three -dimensional visualization of possible mineralization. Interpretations based on the compilation of geological and geophysical data, in association with the regional structural context, suggest that the probable mineralization were originated from the intrusion of the São Sepé Granite, whose hydrothermal fluids were hosted in fractures during the tectonic events that occurred in the region. The results obtained in this work allow to outline a feasible deposit architecture with the geological context of the region and to assist a future drilling strategy aimed at the identified probable targets.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este trabajo presenta la caracterización geológica-geofísica de una probable ocurrencia de oro en el Gabro Santa Catarina, en la región de São Sepé, estado de Rio Grande do Sul, sur de Brasil. Trabajos anteriores han indicado la presencia de oro en la región en las actuales campañas de prospección geoquímica de sedimentos y sugieren que el área de origen sería el Gabro Santa Catarina. Para investigar sobre esta probable ocurrencia de oro, se realizaron estudios geológicos y estructurales, seguidos de la adquisición de información geofísica utilizando los métodos de resistividad DC e IP, con el arreglo dipolo-dipolo. De estos datos se obtuvieron inversiones 2D las cuales luego fueron interpolados para permitir la visualización tridimensional de la posible mineralización. Interpretaciones basadas en la recopilación de datos geológicos y geofísicos, en asociación con el contexto estructural regional, sugieren que la probable mineralización se originó a partir de la intrusión del Granito São Sepé, cuyos fluidos hidrotermales se alojaron en fracturas durante los eventos tectónicos ocurridos en la región. Los resultados obtenidos en este trabajo permiten delinear una arquitectura de yacimiento factible con el contexto geológico de la región y ayudar a una futura estrategia de perforación dirigida a los objetivos probables identificados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Mineral research]]></kwd>
<kwd lng="en"><![CDATA[Resistivity Chargeability]]></kwd>
<kwd lng="en"><![CDATA[Electrical tomography]]></kwd>
<kwd lng="en"><![CDATA[Gold]]></kwd>
<kwd lng="es"><![CDATA[Investigación mineral]]></kwd>
<kwd lng="es"><![CDATA[Resistividad]]></kwd>
<kwd lng="es"><![CDATA[Cargabilidad]]></kwd>
<kwd lng="es"><![CDATA[Tomografía eléctrica]]></kwd>
<kwd lng="es"><![CDATA[Oro]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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