<?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>S1405-33222021000100017</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2021v73n1a021020</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Karst drainage of lake Chakanbacán and its relation to Icaiche Formation]]></article-title>
<article-title xml:lang="es"><![CDATA[Drenaje kárstico del lago Chakanbacán y su relación con la Formación Icaiche]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Leal-Bautista]]></surname>
<given-names><![CDATA[Rosa M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[Eugene C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarado-Flores]]></surname>
<given-names><![CDATA[Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alzate-Gavira]]></surname>
<given-names><![CDATA[Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Maldonado]]></surname>
<given-names><![CDATA[Jorge A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tapia-Tussell]]></surname>
<given-names><![CDATA[Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación Científica de Yucatán, A.C. Unidad de Ciencias del Agua ]]></institution>
<addr-line><![CDATA[Cancún Quintana Roo]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Northern Illinois University Geology and Environmental Geosciences Dept ]]></institution>
<addr-line><![CDATA[ Illinois]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro de Investigación Científica de Yucatán, A.C. Unidad de Ciencias del Agua ]]></institution>
<addr-line><![CDATA[Cancún Quintana Roo]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Centro de Investigación Científica de Yucatán, A.C. Unidad de Energía Renovable ]]></institution>
<addr-line><![CDATA[ Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>73</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222021000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222021000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222021000100017&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Sudden drainage of Lake Chakanbacán (also known as Om or Chakambacab) occurred naturally and without warning between 19 and 21 August, 2018. Lake Chakanbacán, located in southern Quintana Roo, 16.5 Km WNW of Nicolás Bravo, Quintana Roo is part of the western edge of the composite Morocoy-Nuevo Becak polje. Slumping associated with lake drainage has opened up fractures on the west bank of the lake, exposing gypsum of the Icaiche Formation. This occurrence establishes the western lake bank as the easternmost known outcrop of Icaiche gypsum in the area. Drainage of Lake Chakanbacán appears to be part of a karst process that proceeds by rapid dissolution and selective removal of layers of gypsum of the Icaiche Formation beneath the lake bed. Thus, the August 2018 lake drainage may demonstrate, in real-time, an ongoing weathering process responsible for a major regional geomorphic feature: the numerous internally drained karst depressions (poljes) up to &gt;100km long in Campeche and southern Quintana Roo. It has been proposed that these poljes are collapse features resulting from removal in solution of gypsum of the Icaiche Formation. They occur both within and adjacent to a large area where the Icaiche Formation crops out, and, notably, over an estimated 10000 km2 or more within that formation where massive beds of gypsum are present on the surface or beneath a thin protective cap of rock resistant to chemical weathering.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El repentino colapso del lago Chakanbacán (también conocido como Om o Chakambacab) ocurrió de forma natural y .sin previo aviso entre el 19 y el 21 de agosto de 2018. El Lago Chakanbacán, situado al .sur de Quintana Roo, 16.5 Km WNW de Nicolás Bravo, Quintana Roo es parte del borde occidental del polje Morocoy-Nuevo Becak. El desplome asociado con el drenaje del lago ha abierto fracturas en la orilla oeste del lago, exponiendo el yeso de la Formación Icaiche. Esta ocurrencia establece la orilla occidental del lago como el afloramiento más oriental conocido del yeso de Icaiche en la zona. El drenaje del lago Chakanbacán parece ser parte de un proceso kárstico que ocurre por rápida disolución y eliminación selectiva de capas de yeso de la Formación Icaiche bajo el lecho del lago. Por lo tanto, el colapso del lago en agosto de 2018puede demostrar, en tiempo real, un importante proceso de karstificación continuo responsable de una característica geomórologica regional: las numerosas depresiones kársticas drenadas internamente (poljes) de hasta &gt;100 km de largo en Campeche y el sur de Quintana Roo. Se ha propuesto que estos pojes son característicos de colapso resultantes de la eliminación en la solución de yeso de la Formación Icaiche. Estos se producen tanto dentro como adyacentes a una gran área donde la Formación Icaiche se extiende, y, en particular, sobre un estimado de 10000 km2 o más dentro de esa formación donde hay enormes lechos deyeso en la superficie o debajo de una fina capa protectora de roca resistente a la intemperie química.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[karst collapse]]></kwd>
<kwd lng="en"><![CDATA[lake drainage]]></kwd>
<kwd lng="en"><![CDATA[Yucatán Peninsula]]></kwd>
<kwd lng="en"><![CDATA[Gypsum]]></kwd>
<kwd lng="es"><![CDATA[colapso kárstico]]></kwd>
<kwd lng="es"><![CDATA[laguna drenada]]></kwd>
<kwd lng="es"><![CDATA[Yucatán Península]]></kwd>
<kwd lng="es"><![CDATA[yeso]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bauer-Gottwein]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Gondwe]]></surname>
<given-names><![CDATA[R.N.]]></given-names>
</name>
<name>
<surname><![CDATA[Charvet]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Marín]]></surname>
<given-names><![CDATA[L.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Rebolledo-Vieyra]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Merediz-Alonso]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Review: The Yucatán Peninsula karst aquifer, Mexico]]></article-title>
<source><![CDATA[Hydrogeology Journal]]></source>
<year>2011</year>
<volume>19</volume>
<page-range>507-24</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Butterlin]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bonet]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Información básica para la interpretación geohidrológica de la Península de Yucatán]]></source>
<year>1960</year>
<publisher-loc><![CDATA[México D.F., México ]]></publisher-loc>
<publisher-name><![CDATA[Reporte de la Secretaría de Recursos Hidráulicos]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dunning]]></surname>
<given-names><![CDATA[N.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Beach]]></surname>
<given-names><![CDATA[T.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Luzzadder-Beach]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Kax and kol: Collapse and resilience in lowland Maya civilization]]></article-title>
<source><![CDATA[Proceedings of National Academy of Sciences]]></source>
<year>2012</year>
<volume>109</volume>
<page-range>3652-7</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="">
<collab>Instituto Nacional de Estadística y Geografía</collab>
<source><![CDATA[Modelos Digitales de Elevación, Campeche, map E16A73, 1:50000. O 89°00 - O 89°00/N 18°15 - N 18°30]]></source>
<year>2001</year>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Johnson]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gypsum-karst problems in constructing dams in the USA]]></article-title>
<source><![CDATA[Environmental Geology]]></source>
<year>2008</year>
<volume>53</volume>
<page-range>945-50</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Klimchouk]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hydrogeology of gypsum formations]]></article-title>
<source><![CDATA[International Journal of Speleology]]></source>
<year>1996</year>
<volume>25</volume>
<page-range>83-9</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Leal-Bautista]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[colapso Laguna Om o ChakanBakan, Municipio de Othón P Blanco]]></source>
<year>2018</year>
<publisher-loc><![CDATA[Quintana Roo, México ]]></publisher-loc>
<publisher-name><![CDATA[Centro de Investigación Científica de Yucatán AC.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Marcial]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Desaparece laguna en el ejido de Laguna Om]]></article-title>
<source><![CDATA[Compendio Quintanarroense]]></source>
<year>2018</year>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[E.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Velázquez-Olimán]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Marin]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The hydrogeochemistry of the karst aquifer system of the northern Yucatán Peninsula, Mexico]]></article-title>
<source><![CDATA[International Geology Review]]></source>
<year>2002</year>
<volume>44</volume>
<page-range>191-221</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[E.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Paytan]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Pedersen]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Velázquez-Olimán]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Groundwater geochemistry of the Yucatán Peninsula, Mexico: constraints on stratigraphy and hydrogeology]]></article-title>
<source><![CDATA[Journal of Hydrogeology]]></source>
<year>2009</year>
<volume>367</volume>
<page-range>27-40</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[E.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Velázquez-Olimán]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Wagner]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Groundwater and surface water geochemistry of Cl, SO4, and Sr in Campeche and southern Quintana Roo]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Oswald]]></surname>
<given-names><![CDATA[Ú.]]></given-names>
</name>
</person-group>
<source><![CDATA[Water Research in Mexico: Scarcity, Degradation, Stress, Conflicts, Management and Policy]]></source>
<year>2011</year>
<page-range>87-97</page-range><publisher-loc><![CDATA[Berlin, Germany ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[E.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Velázquez-Olimán]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Leal-Bautista]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Dunning]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Icaiche Formation: Major Contributor to the Stratigraphy, Hydrogeochemistry and Geomorphology of the Northern Yucatán Peninsula, Mexico]]></article-title>
<source><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></source>
<year>2019</year>
<volume>71</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>741-60</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[E.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Leal-Bautista]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Velázquez-Olimán]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Wagner]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Icaiche formation: unacknowledged contributor to Yucatán hydrogeology and geomorphology]]></article-title>
<source><![CDATA[The 130th Annual Meeting of Geological Society of America in Indianapolis, Indiana, USA]]></source>
<year>2018</year>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[E.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Velazquez-Olimán]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Leal-Bautista]]></surname>
<given-names><![CDATA[R.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sanchez-Sanchez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wagner]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Aspects of the Hydrogeology of southern Campeche and Quintana Roo, México]]></article-title>
<source><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></source>
<year>2021</year>
<volume>73</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sánchez-Sánchez]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Álvarez-Legorreta]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Pacheco-Ávila]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[González-Herrera]]></surname>
<given-names><![CDATA[R.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Carrillo-Bribiezca]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Caracterización hidrogeoquímica de las aguas subterráneas del sur del Estado de Quintana Roo, México]]></article-title>
<source><![CDATA[Revista Mexicana de Ciencias Geológicas]]></source>
<year>2015</year>
<volume>32</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>62-76</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="">
<collab>Servicio Geológico Mexicano</collab>
<source><![CDATA[Carta Geológico-Minera, Estados de: Campeche, Quintana Roo y Yucatán, escala 1:500000; 1 map]]></source>
<year>2007</year>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<collab>Vanguardia</collab>
<source><![CDATA[Laguna de Quintana Roo quedó semiseca tras estruendo]]></source>
<year>2018</year>
<publisher-loc><![CDATA[Mexico ]]></publisher-loc>
<publisher-name><![CDATA[Grupo Editorial Coahuila]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wagner]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[A geochemical study of the southern and northeastern Yucatán Peninsula, Mexico]]></source>
<year>2009</year>
<publisher-loc><![CDATA[DeKalb, IL, USA ]]></publisher-loc>
<publisher-name><![CDATA[Northern Illinois University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="">
<collab>Yucatan times</collab>
<source><![CDATA[Laguna de Quintana Roo was semi-dry after roar. Quintana Roo: Mexico]]></source>
<year>2018</year>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
