<?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>S0016-71692016000400255</article-id>
<article-id pub-id-type="doi">10.19155/geofint.2016.055.4.3</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Establishing the range of background for radon variations in groundwater along the Serghaya fault in southwestern Syria]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Al-Hilal]]></surname>
<given-names><![CDATA[Mohamed]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Atomic Energy Commission of Syria Department of Geology ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Syria</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>55</volume>
<numero>4</numero>
<fpage>255</fpage>
<lpage>266</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-71692016000400255&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-71692016000400255&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-71692016000400255&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Long-term groundwater radon measurements were carried out in two selected karstic springs emerging from the Serghaya fault zone in southwestern Syria. The work is aimed at determining the range of radon background along the concerned fault, which represents a prominent branch segment of the Dead Sea Fault System in the region. The obtained data was statistically analyzed and the mean radon values have been standardized in terms of probability of magnitude in order to enable the separation between normal radon variations from other anomalous or geotectonic related values. The results revealed a general background range of radon concentration varying between 5000 and 13000 Bqm-3, and thus all radon values lying outside this range were considered anomalous. However, remarkable clusters of high radon concentrations with peak values more than twice times the background level, were observed in both monitoring springs through the period (1992-1994). These abnormal radon values were positively correlated with simultaneous time of high precipitations, while no significant earthquake activities were recorded in the region during that period. Therefore, such radon signals do not seem to be a reflection of regional changes in crustal strain, but rather they mostly indicate evidences of radon response to the groundwater table fluctuations due to high precipitations. These consequences may confirm the usefulness of radon application as an important natural tracer in hydrogeological investigations.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se midió la presencia a largo plazo de radón en el agua en dos manantiales kársticos que salen de la zona de falla de Serghaya en el suroeste de Siria. El objetivo de este trabajo es determinar el rango ambiental del radón a lo largo de dicha falla, lo cual en la región representa una rama prominente en el sistema de fallas de Mar Muerto. Se analizaron los datos obtenidos de forma estadística y los valores medios de radón fueron estandarizados en términos de probabilidad de magnitud, con la finalidad de permitir distinguir entre las variaciones normales de radón y las de otros valores anómalos o geotecnónicos. Los resultados revelaron una gama ambiental general de la concentración de radón que varía entre 5.000 y 13.000 Bqm-3 y, por lo tanto, todos los valores de radón que se encuentran fuera de este intervalo se consideraron anómalos. Sin embargo, existen ramas de altas concentraciones de radón con valores pico de más del doble a nivel de fondo; pudieron observarse durante el monitoreo en ambos muelles durante el periodo de 1992 a 1994. Estos valores anormales de radón se correlacionaron positivamente al momento de altas precipitaciones, y no se registró actividad sísmica durante este período. Por lo tanto, los cambios en la tensión de la cortesa no parecen verse reflejados en las concentración de radón, sino que la mayoría se debe a las altas precipitaciones. Lo anterior confirma la utilidad de la aplicación de radón como un importante indicador natural en investigaciones hidrogeológicas.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Radón ambiental]]></kwd>
<kwd lng="es"><![CDATA[agua subterránea]]></kwd>
<kwd lng="es"><![CDATA[primavera kárstica]]></kwd>
<kwd lng="es"><![CDATA[Falla de Serghaya]]></kwd>
<kwd lng="es"><![CDATA[Syria]]></kwd>
<kwd lng="en"><![CDATA[Radon background]]></kwd>
<kwd lng="en"><![CDATA[groundwater]]></kwd>
<kwd lng="en"><![CDATA[karstic spring]]></kwd>
<kwd lng="en"><![CDATA[Serghaya fault]]></kwd>
<kwd lng="en"><![CDATA[Syria]]></kwd>
</kwd-group>
</article-meta>
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