<?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>0256-7024</journal-id>
<journal-title><![CDATA[Revista Geológica de América Central]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Geol. Amér. Central]]></abbrev-journal-title>
<issn>0256-7024</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0256-70242019000200079</article-id>
<article-id pub-id-type="doi">10.15517/rgac.v61i0.36898</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracterización mineralógica y mecánica de un colgante de piedra verde, del sitio arqueológico Nuevo Corinto, Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Mineralogical and mechanical characterization of a green stone pendant, from the archaeological site of Nuevo Corinto, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Conejo]]></surname>
<given-names><![CDATA[Geraldine]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chavarría]]></surname>
<given-names><![CDATA[Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acevedo]]></surname>
<given-names><![CDATA[Benjamín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera]]></surname>
<given-names><![CDATA[Óscar A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A7"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montero]]></surname>
<given-names><![CDATA[Mavis L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Escuela de Química ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigación en Ciencia e Ingeniería de Materiales (CICIMA) ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Costa Rica Instituto de Investigaciones en Arte (IIARTE) ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Costa Rica Escuela de Física ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Costa Rica Escuela de Antropología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigaciones Antropológicas (CIAN) ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigación en Ciencias Atómicas Nucleares y Moleculares (CICANUM) ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<numero>61</numero>
<fpage>79</fpage>
<lpage>90</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0256-70242019000200079&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0256-70242019000200079&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0256-70242019000200079&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las piedras verdes fueron objetos de gran importancia dentro de las poblaciones precolombinas del territorio costarricense y fueron producidas desde el año 500 a.n.e hasta 900 n.e. El colgante verde en estudio pertenece al Periodo Terminal (700 a 900 n.e.) y fue hallado en el sitio arqueológico Nuevo Corinto (L72-NC), localizado en la zona de &#8220;Línea Vieja&#8221;, en el Caribe Central de Costa Rica. Se determinó la composición mineral del colgante mediante difracción de rayos X (XRD), que permitió clasificarlo como un &#8220;jade social&#8221;, debido a que su componente mineral principal es cuarzo. El estado de conservación de la pieza mostró una baja estabilidad mecánica que se determinó mediante mediciones de pulso ultrasónico, y que se comparó con muestras de jadeíta y de cuarzo, esta baja estabilidad mecánica esta posiblemente asociada a los procesos de meteorización posdeposicionales del sitio donde se localizó la pieza. A su vez se observaron características morfológicas generales mediante microscopia de luz y de barrido electrónico (SEM), tal como una superficie irregular, en donde los orificios observados presentaron una mayor presencia de Fe y Al, mientras que las superficies lisas tienen una mayor presencia de Si, lo que coincide con los procesos de meteorización observados. Este estudio permitió realizar una clasificación del colgante, así como determinar el estado de conservación de la pieza y sus procesos de meteorización.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The green stones were objects of great importance within the pre-Columbian populations of the Costa Rican territory and were produced from year 500 BCE up to 900 CE. The green pendant studied belongs to the Terminal Period (700 to 900 CE) and was found in Nuevo Corinto archaeological site (L72-NC), located in &#8220;Línea Vieja&#8221; zone, in Central Caribbean of Costa Rica. The mineral composition of the pendant was determined by X-ray diffraction (XRD), which allowed to classify it as a &#8220;social jade&#8221; because its main mineral component is quartz. The state of conservation of the piece showed a lower mechanical stability determine by ultrasonic pulse measurements, and compared to samples of jadeite and quartz. This is possibly associated with postdepositional weathering processes of the site where the piece was located. At the same time, general morphological characteristics were observed through a combination of light microscopy and scanning electron microscopy (SEM), such as an irregular surface, where the orifices observed have a mayor presence of Fe and Al, while the smooth surfaces have a greater presence of Si, which is in agreement with the weathering processes observed. This study allowed a classification of the pendant, as well as to determine the state of conservation of the piece and the associated weathering processes.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Jade social]]></kwd>
<kwd lng="es"><![CDATA[piedra verde]]></kwd>
<kwd lng="es"><![CDATA[caracterización]]></kwd>
<kwd lng="es"><![CDATA[estabilidad mecánica]]></kwd>
<kwd lng="es"><![CDATA[procesos de meteorización.]]></kwd>
<kwd lng="en"><![CDATA[Social jade]]></kwd>
<kwd lng="en"><![CDATA[green stone]]></kwd>
<kwd lng="en"><![CDATA[characterization]]></kwd>
<kwd lng="en"><![CDATA[mechanical stability]]></kwd>
<kwd lng="en"><![CDATA[weathering processes]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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