<?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>S1405-33222025000200004</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2025v77n2a200225</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Archaeointensity analysis and archaeomagnetic age constraints of Maya pottery from Chichén-Itzá and surrounding sites]]></article-title>
<article-title xml:lang="es"><![CDATA[Análisis de arqueointensidad y datación arqueomagnética de cerámica maya proveniente de Chichén-Itzá y zonas aledañas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Trejo]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alva-Valdivia]]></surname>
<given-names><![CDATA[Luis Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geociencias Laboratorio de Paleomagnetismo]]></institution>
<addr-line><![CDATA[Juriquilla Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geofísica ]]></institution>
<addr-line><![CDATA[Coyoacán Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>77</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222025000200004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222025000200004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222025000200004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The results of archaeointensity and magnetic property analyses are presented for 24 ceramic fragments collected from four archaeological sites in the Maya region: Chichén-Itzá, Flor de Mayo and San Pedro Cholul in Yucatán, Mexico and Busiljá-Chocoljá in Chiapas, Mexico. The samples span various periods of occupation in the Maya area, ranging from the Middle Preclassic to the Early Postclassic. The analysis of magnetic properties identified titanomagnetite, with varying titanium content, as the primary carrier of magnetization. Different magnetic phases were detected, with Curie temperatures ranging from 150 °C to 520 °C, determined through k-T curve experiments. Magnetic hysteresis experiments revealed saturation magnetization values between 150 mT and 300 mT, with coercivity values ranging from 4.2 mT to 9.6 mT. The saturation remanence to saturation magnetization ratio (Mrs/Ms) varied between 0.10 and 0.26, indicating a behavior characteristic of pseudo-single domain (PSD) grains. A total of nine archaeointensity values were obtained at the specimen level, ranging from 32 ± 3.2 &#956;T to 67.6 ± 2.5 &#956;T, with virtual axial dipole moment (VADM) values between 7.37 ZAm² and 14.84 ZAm². Additionally, four representative mean archaeointensity values were determined for the studied sites. The results are consistent with the expected values for the region and the estimated age of the materials, in agreement with available regional and global paleosecular variation models. Furthermore, four archaeomagnetic ages were estimated for the ceramic types analyzed across the different study sites, covering a period from the Middle Preclassic to the Terminal Late Classic. These estimations contribute to refining and constraining the previously assigned ages for each ceramic type based on its archaeological context.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se presentan los resultados de arqueointensidad y propiedades magnéticas obtenidos a partir del análisis de 24 fragmentos cerámicos recolectados en cuatro sitios arqueológicos de la zona Maya: Chichén-Itzá, Flor de Mayo y San Pedro Cholul, en Yucatán, México, y Busiljá- Chocoljá, en Chiapas, México. Las muestras abarcan distintos periodos de ocupación en el área maya, desde el Preclásico Medio hasta el Posclásico Temprano. El análisis de las propiedades magnéticas identificó a la titanomagnetita, con diferentes contenidos de titanio, como el principal portador de la magnetización. Se detectaron distintas fases magnéticas con temperaturas de Curie que oscilan entre 150 °C y 520 °C, determinadas mediante experimentos de curvas k-T. Los experimentos de histéresis magnética muestran valores de saturación magnética entre 150 mT y 300 mT, con una coercitividad que varía entre 4.2 mT y 9.6 mT. El cociente de remanencia de saturación respecto a la magnetización de saturación (Mrs/Ms) varía entre 0.10 y 0.26, lo que indica un comportamiento característico de pseudo-dominios simples (PSD). Se obtuvieron 9 valores de arqueointensidad a nivel espécimen, que varían entre 32 ± 3.2 &#956;T y 67.6 ± 2.5 &#956;T, con valores de momento dipolar axial virtual (VADM) comprendidos entre 7.37 ZAm² y 14.84 ZAm². Se obtuvieron 4 arqueointensidades medias representativas de los sitios estudiados. Los resultados obtenidos son consistentes con los valores esperados para la región y la edad esperada de los materiales, en concordancia con los modelos de variación paleosecular regionales y globales disponibles. Asimismo, se estimaron cuatro edades arqueomagnéticas correspondientes a los tipos cerámicos analizados en los distintos sitios de estudio, abarcando un periodo que va desde el Preclásico Medio hasta el Clásico Tardío Terminal. Estas estimaciones contribuyen a restringir y precisar las edades previamente asignadas a cada tipo cerámico en función de su contexto arqueológico.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[archeomagnetism]]></kwd>
<kwd lng="en"><![CDATA[archaeointensity]]></kwd>
<kwd lng="en"><![CDATA[Chichén-Itzá]]></kwd>
<kwd lng="en"><![CDATA[paleomagnetism]]></kwd>
<kwd lng="en"><![CDATA[geoarcheology]]></kwd>
<kwd lng="en"><![CDATA[geophysics.]]></kwd>
<kwd lng="es"><![CDATA[arqueomagnetismo]]></kwd>
<kwd lng="es"><![CDATA[archaeointensidad]]></kwd>
<kwd lng="es"><![CDATA[Chichén-Itzá]]></kwd>
<kwd lng="es"><![CDATA[paleomagnetismo]]></kwd>
<kwd lng="es"><![CDATA[geoarqueología]]></kwd>
<kwd lng="es"><![CDATA[geofísica.]]></kwd>
</kwd-group>
</article-meta>
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