<?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>S1405-33222019000200383</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2019v71n2a9</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Combined study of archaeomagnetism and Raman spectroscopy of experimentally burnt limestones from the middle-palaeolithic site of Pinilla del Valle (Madrid, Spain)]]></article-title>
<article-title xml:lang="es"><![CDATA[Estudio combinado de arqueomagnetismo y espectroscopía Raman de calizas calcinadas experimentalmente del yacimiento del Paleolítico medio en Pinilla del Valle (Madrid, España)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrancho]]></surname>
<given-names><![CDATA[Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jorge-Villar]]></surname>
<given-names><![CDATA[Susana E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Romero]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Karampaglidis]]></surname>
<given-names><![CDATA[Theodoros]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Burgos Dpto. Historia, Geografía y Comunicación ]]></institution>
<addr-line><![CDATA[Burgos ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Burgos Facultad de Educación Área de Geodinámica Interna]]></institution>
<addr-line><![CDATA[Burgos ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro Nacional de Investigación sobre la Evolución Humana  ]]></institution>
<addr-line><![CDATA[Burgos ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>71</volume>
<numero>2</numero>
<fpage>383</fpage>
<lpage>396</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222019000200383&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222019000200383&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222019000200383&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Here we report the archaeomagnetic, rock-magnetic and Raman spectroscopy results of sample analysis from two types of limestones that were experimentally heated under controlled conditions. These lithologies have been commonly identified at the middle-palaeolithic sites of Descubierta Cave and Navalmaillo rock-shelter (Pinilla del Valle, Madrid, Spain). By means of a thermocouple system, maximum heating temperatures of 400 &#8722; 450 ºC were recorded during one hour. The main goal was to characterize the variations in the magnetic mineralogy and (in)organic compounds, and to study the record of the Earth´s magnetic field direction at the time of cooling. This allowed us to obtain a pattern that is potentially applicable to archaeological limestones in order to identify combustion structures at the site. All experiments were carried out on representative samples both before and after experimental heating. Before heating, both types of limestones were dominated by dolomite and calcite and as main iron oxides, goethite and magnetite. After heating, the original goethite persisted in samples heated to low temperatures (&lt;200 ºC) whereas it transformed to haematite and/or magnetite in those heated to 450 ºC. Mineralogical alterations mostly focused on the outermost 1st cm of depth. The neoformation of magnetite as intermediate step in the dehydration process of goethite to haematite has been barely documented and has palaeomagnetic implications. The mineralogical results obtained, their implications for the identification of fire at the site as well as potential applications to similar cases studies are discussed.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se presentan los resultados arqueomagnéticos, de propiedades magnéticas y espectroscopia Raman obtenidos de analizar muestras de dos tipos de calizas calentadas experimentalmente bajo condiciones controladas. Estas calizas han sido frecuentemente identificadas en los yacimientos de paleolítico medio de Cueva Descubierta y Abrigo de Navalmaíllo (Pinilla del Valle, Madrid, España). Mediante un sistema de termopares, se registraron temperaturas máximas de calentamiento de 400-450 ºC durante una hora. El objetivo es caracterizar las variaciones en la mineralogía ferromagnética y los compuestos (in)orgánicos, así como estudiar el registro de la dirección del campo magnético terrestre en el momento del enfriamiento. Esto permitirá obtener un patrón extrapolable a las calizas arqueológicas de cara a identificar estructuras de combustión en el yacimiento. Los experimentos de ambas técnicas fueron realizados en muestras representativas de ambas litologías tanto antes como después de la quema experimental. Antes de la quema, ambos tipos de caliza estaban dominados por dolomita y calcita y, como principales óxidos de hierro, goetita y magnetita. Tras la quema, la goetita original pervivió en las muestras calentadas &lt;200 ºC mientras que se transformó a hematites y/o magnetita en las calentadas en torno a 450 ºC. Las alteraciones mineralógicas se centraron mayoritariamente en el 1er cm de profundidad. La neoformación de magnetita como paso intermedio en el proceso de deshidratación de la goetita hacia hematites ha sido poco documentada y tiene implicaciones paleomagnéticas. Se discuten los resultados mineralógicos, sus implicaciones para la identificación de fuego en el yacimiento así como sus potenciales aplicaciones a casos de estudio similares.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[iron oxides]]></kwd>
<kwd lng="en"><![CDATA[experimental fires]]></kwd>
<kwd lng="en"><![CDATA[geoarchaeology]]></kwd>
<kwd lng="en"><![CDATA[hearths]]></kwd>
<kwd lng="en"><![CDATA[Palaeolithic]]></kwd>
<kwd lng="en"><![CDATA[thermal remanent magnetisation]]></kwd>
<kwd lng="es"><![CDATA[Óxidos de hierro]]></kwd>
<kwd lng="es"><![CDATA[fuegos experimentales]]></kwd>
<kwd lng="es"><![CDATA[geoarqueología]]></kwd>
<kwd lng="es"><![CDATA[hogares]]></kwd>
<kwd lng="es"><![CDATA[Paleolítico]]></kwd>
<kwd lng="es"><![CDATA[magnetización termorremanente]]></kwd>
</kwd-group>
</article-meta>
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