Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology
Identifieur interne : 000027 ( Istex/Corpus ); précédent : 000026; suivant : 000028Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology
Auteurs : Mostafa Oukassou ; Omar Saddiqi ; Jocelyn Barbarand ; Samira Sebti ; Lahssen Baidder ; André MichardSource :
- Terra Nova [ 0954-4879 ] ; 2013-04.
Abstract
The origin of the Anti‐Atlas relief is one of the currently debated issues of Moroccan geology. To constrain the post‐Variscan evolution of the Central Anti‐Atlas, we collected nine samples from the Precambrian basement of the Bou Azzer‐El Graara inlier for zircon and apatite fission‐track thermochronology. Zircon ages cluster between 340 ± 20 and 306 ± 20 Ma, whereas apatite ages range from 171 ± 7 Ma to 133 ± 5 Ma. Zircon ages reflect the thermal effect of the Variscan orogeny (tectonic thickening of the ca. 7 km‐thick Paleozoic series), likely enhanced by fluid advection. Apatite ages record a complex Mesozoic–Cenozoic exhumation history. Track length modelling yields evidence that, (i) the Precambrian basement was still buried at ca. 5 km depth by Permian times, (ii) the Central Anti‐Atlas was subjected to (erosional) exhumation during the Triassic‐Early Cretaceous, then buried beneath ca. 1.5 km‐thick Cretaceous‐Paleogene deposits, (iii) final exhumation took place during the Neogene, contemporaneously with that of the High Atlas.
Url:
DOI: 10.1111/ter.12019
Links to Exploration step
ISTEX:A52B048C83D2D1DEAE281CBD0766AEA1F69008EFLe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology</title><author><name sortKey="Oukassou, Mostafa" sort="Oukassou, Mostafa" uniqKey="Oukassou M" first="Mostafa" last="Oukassou">Mostafa Oukassou</name><affiliation><mods:affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</mods:affiliation></affiliation></author><author><name sortKey="Saddiqi, Omar" sort="Saddiqi, Omar" uniqKey="Saddiqi O" first="Omar" last="Saddiqi">Omar Saddiqi</name><affiliation><mods:affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</mods:affiliation></affiliation></author><author><name sortKey="Barbarand, Jocelyn" sort="Barbarand, Jocelyn" uniqKey="Barbarand J" first="Jocelyn" last="Barbarand">Jocelyn Barbarand</name><affiliation><mods:affiliation>Université Paris‐Sud, UMR CNRS‐UPS 8148 IDES, 91405, Bâtiment 504Orsay Cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Sebti, Samira" sort="Sebti, Samira" uniqKey="Sebti S" first="Samira" last="Sebti">Samira Sebti</name><affiliation><mods:affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</mods:affiliation></affiliation></author><author><name sortKey="Baidder, Lahssen" sort="Baidder, Lahssen" uniqKey="Baidder L" first="Lahssen" last="Baidder">Lahssen Baidder</name><affiliation><mods:affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</mods:affiliation></affiliation></author><author><name sortKey="Michard, Andre" sort="Michard, Andre" uniqKey="Michard A" first="André" last="Michard">André Michard</name><affiliation><mods:affiliation>Paris XI University, 10 rue des Jeûneurs, 75002, Paris, France</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:A52B048C83D2D1DEAE281CBD0766AEA1F69008EF</idno><date when="2013" year="2013">2013</date><idno type="doi">10.1111/ter.12019</idno><idno type="url">https://api.istex.fr/document/A52B048C83D2D1DEAE281CBD0766AEA1F69008EF/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000027</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000027</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology</title><author><name sortKey="Oukassou, Mostafa" sort="Oukassou, Mostafa" uniqKey="Oukassou M" first="Mostafa" last="Oukassou">Mostafa Oukassou</name><affiliation><mods:affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</mods:affiliation></affiliation></author><author><name sortKey="Saddiqi, Omar" sort="Saddiqi, Omar" uniqKey="Saddiqi O" first="Omar" last="Saddiqi">Omar Saddiqi</name><affiliation><mods:affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</mods:affiliation></affiliation></author><author><name sortKey="Barbarand, Jocelyn" sort="Barbarand, Jocelyn" uniqKey="Barbarand J" first="Jocelyn" last="Barbarand">Jocelyn Barbarand</name><affiliation><mods:affiliation>Université Paris‐Sud, UMR CNRS‐UPS 8148 IDES, 91405, Bâtiment 504Orsay Cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Sebti, Samira" sort="Sebti, Samira" uniqKey="Sebti S" first="Samira" last="Sebti">Samira Sebti</name><affiliation><mods:affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</mods:affiliation></affiliation></author><author><name sortKey="Baidder, Lahssen" sort="Baidder, Lahssen" uniqKey="Baidder L" first="Lahssen" last="Baidder">Lahssen Baidder</name><affiliation><mods:affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</mods:affiliation></affiliation></author><author><name sortKey="Michard, Andre" sort="Michard, Andre" uniqKey="Michard A" first="André" last="Michard">André Michard</name><affiliation><mods:affiliation>Paris XI University, 10 rue des Jeûneurs, 75002, Paris, France</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Terra Nova</title><title level="j" type="abbrev">Terra Nova</title><idno type="ISSN">0954-4879</idno><idno type="eISSN">1365-3121</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2013-04">2013-04</date><biblScope unit="volume">25</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="151">151</biblScope><biblScope unit="page" to="159">159</biblScope></imprint><idno type="ISSN">0954-4879</idno></series><idno type="istex">A52B048C83D2D1DEAE281CBD0766AEA1F69008EF</idno><idno type="DOI">10.1111/ter.12019</idno><idno type="ArticleID">TER12019</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0954-4879</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The origin of the Anti‐Atlas relief is one of the currently debated issues of Moroccan geology. To constrain the post‐Variscan evolution of the Central Anti‐Atlas, we collected nine samples from the Precambrian basement of the Bou Azzer‐El Graara inlier for zircon and apatite fission‐track thermochronology. Zircon ages cluster between 340 ± 20 and 306 ± 20 Ma, whereas apatite ages range from 171 ± 7 Ma to 133 ± 5 Ma. Zircon ages reflect the thermal effect of the Variscan orogeny (tectonic thickening of the ca. 7 km‐thick Paleozoic series), likely enhanced by fluid advection. Apatite ages record a complex Mesozoic–Cenozoic exhumation history. Track length modelling yields evidence that, (i) the Precambrian basement was still buried at ca. 5 km depth by Permian times, (ii) the Central Anti‐Atlas was subjected to (erosional) exhumation during the Triassic‐Early Cretaceous, then buried beneath ca. 1.5 km‐thick Cretaceous‐Paleogene deposits, (iii) final exhumation took place during the Neogene, contemporaneously with that of the High Atlas.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Mostafa Oukassou</name><affiliations><json:string>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</json:string></affiliations></json:item><json:item><name>Omar Saddiqi</name><affiliations><json:string>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</json:string></affiliations></json:item><json:item><name>Jocelyn Barbarand</name><affiliations><json:string>Université Paris‐Sud, UMR CNRS‐UPS 8148 IDES, 91405, Bâtiment 504Orsay Cedex, France</json:string></affiliations></json:item><json:item><name>Samira Sebti</name><affiliations><json:string>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</json:string></affiliations></json:item><json:item><name>Lahssen Baidder</name><affiliations><json:string>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</json:string></affiliations></json:item><json:item><name>André Michard</name><affiliations><json:string>Paris XI University, 10 rue des Jeûneurs, 75002, Paris, France</json:string></affiliations></json:item></author><articleId><json:string>TER12019</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>The origin of the Anti‐Atlas relief is one of the currently debated issues of Moroccan geology. To constrain the post‐Variscan evolution of the Central Anti‐Atlas, we collected nine samples from the Precambrian basement of the Bou Azzer‐El Graara inlier for zircon and apatite fission‐track thermochronology. Zircon ages cluster between 340 ± 20 and 306 ± 20 Ma, whereas apatite ages range from 171 ± 7 Ma to 133 ± 5 Ma. Zircon ages reflect the thermal effect of the Variscan orogeny (tectonic thickening of the ca. 7 km‐thick Paleozoic series), likely enhanced by fluid advection. Apatite ages record a complex Mesozoic–Cenozoic exhumation history. Track length modelling yields evidence that, (i) the Precambrian basement was still buried at ca. 5 km depth by Permian times, (ii) the Central Anti‐Atlas was subjected to (erosional) exhumation during the Triassic‐Early Cretaceous, then buried beneath ca. 1.5 km‐thick Cretaceous‐Paleogene deposits, (iii) final exhumation took place during the Neogene, contemporaneously with that of the High Atlas.</abstract><qualityIndicators><score>6.664</score><pdfVersion>1.3</pdfVersion><pdfPageSize>595.276 x 790.866 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>0</keywordCount><abstractCharCount>1051</abstractCharCount><pdfWordCount>4912</pdfWordCount><pdfCharCount>36113</pdfCharCount><pdfPageCount>9</pdfPageCount><abstractWordCount>146</abstractWordCount></qualityIndicators><title>Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology</title><genre><json:string>article</json:string></genre><host><volume>25</volume><publisherId><json:string>TER</json:string></publisherId><pages><total>9</total><last>159</last><first>151</first></pages><issn><json:string>0954-4879</json:string></issn><issue>2</issue><subject><json:item><value>Paper</value></json:item></subject><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>1365-3121</json:string></eissn><title>Terra Nova</title><doi><json:string>10.1111/(ISSN)1365-3121</json:string></doi></host><publicationDate>2013</publicationDate><copyrightDate>2013</copyrightDate><doi><json:string>10.1111/ter.12019</json:string></doi><id>A52B048C83D2D1DEAE281CBD0766AEA1F69008EF</id><score>0.3419395</score><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/A52B048C83D2D1DEAE281CBD0766AEA1F69008EF/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/A52B048C83D2D1DEAE281CBD0766AEA1F69008EF/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/A52B048C83D2D1DEAE281CBD0766AEA1F69008EF/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><availability><p>Copyright © 2013 Blackwell Publishing Ltd© 2012 Blackwell Publishing Ltd</p></availability><date>2012-12-04</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology</title><author xml:id="author-1"><persName><forename type="first">Mostafa</forename><surname>Oukassou</surname></persName><affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</affiliation></author><author xml:id="author-2"><persName><forename type="first">Omar</forename><surname>Saddiqi</surname></persName><note type="correspondence"><p>Correspondence: Professor Omar Saddiqi, Geology, Uni. Hassan II Casablanca, BP 5366 MAARIF, Casablanca 20000, Morocco. Tel.: +00212661413712; fax: +00212522230674; e‐mail:</p></note><affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</affiliation></author><author xml:id="author-3"><persName><forename type="first">Jocelyn</forename><surname>Barbarand</surname></persName><affiliation>Université Paris‐Sud, UMR CNRS‐UPS 8148 IDES, 91405, Bâtiment 504Orsay Cedex, France</affiliation></author><author xml:id="author-4"><persName><forename type="first">Samira</forename><surname>Sebti</surname></persName><affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</affiliation></author><author xml:id="author-5"><persName><forename type="first">Lahssen</forename><surname>Baidder</surname></persName><affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</affiliation></author><author xml:id="author-6"><persName><forename type="first">André</forename><surname>Michard</surname></persName><affiliation>Paris XI University, 10 rue des Jeûneurs, 75002, Paris, France</affiliation></author></analytic><monogr><title level="j">Terra Nova</title><title level="j" type="abbrev">Terra Nova</title><idno type="pISSN">0954-4879</idno><idno type="eISSN">1365-3121</idno><idno type="DOI">10.1111/(ISSN)1365-3121</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2013-04"></date><biblScope unit="volume">25</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="151">151</biblScope><biblScope unit="page" to="159">159</biblScope></imprint></monogr><idno type="istex">A52B048C83D2D1DEAE281CBD0766AEA1F69008EF</idno><idno type="DOI">10.1111/ter.12019</idno><idno type="ArticleID">TER12019</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2012-12-04</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The origin of the Anti‐Atlas relief is one of the currently debated issues of Moroccan geology. To constrain the post‐Variscan evolution of the Central Anti‐Atlas, we collected nine samples from the Precambrian basement of the Bou Azzer‐El Graara inlier for zircon and apatite fission‐track thermochronology. Zircon ages cluster between 340 ± 20 and 306 ± 20 Ma, whereas apatite ages range from 171 ± 7 Ma to 133 ± 5 Ma. Zircon ages reflect the thermal effect of the Variscan orogeny (tectonic thickening of the ca. 7 km‐thick Paleozoic series), likely enhanced by fluid advection. Apatite ages record a complex Mesozoic–Cenozoic exhumation history. Track length modelling yields evidence that, (i) the Precambrian basement was still buried at ca. 5 km depth by Permian times, (ii) the Central Anti‐Atlas was subjected to (erosional) exhumation during the Triassic‐Early Cretaceous, then buried beneath ca. 1.5 km‐thick Cretaceous‐Paleogene deposits, (iii) final exhumation took place during the Neogene, contemporaneously with that of the High Atlas.</p></abstract><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Paper</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2012-02-11">Received</change><change when="2012-10-30">Registration</change><change when="2012-12-04">Created</change><change when="2013-04">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/A52B048C83D2D1DEAE281CBD0766AEA1F69008EF/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:id="ter12019" xml:lang="en"><header><publicationMeta level="product"><doi origin="wiley" registered="yes">10.1111/(ISSN)1365-3121</doi><issn type="print">0954-4879</issn><issn type="electronic">1365-3121</issn><idGroup><id type="product" value="TER"></id></idGroup><titleGroup><title sort="TERRA NOVA" type="main">Terra Nova</title><title type="short">Terra Nova</title></titleGroup></publicationMeta><publicationMeta level="part" position="04102"><doi origin="wiley">10.1111/ter.2013.25.issue-2</doi><copyright ownership="publisher">Copyright © 2013 Blackwell Publishing Ltd</copyright><numberingGroup><numbering type="journalVolume" number="25">25</numbering><numbering type="journalIssue">2</numbering></numberingGroup><coverDate startDate="2013-04">April 2013</coverDate></publicationMeta><publicationMeta level="unit" position="9" status="forIssue" type="article"><doi>10.1111/ter.12019</doi><idGroup><id type="unit" value="TER12019"></id></idGroup><countGroup><count number="9" type="pageTotal"></count></countGroup><titleGroup><title type="articleCategory">Paper</title><title type="tocHeading1">ORIGINAL ARTICLES</title></titleGroup><copyright ownership="publisher">© 2012 Blackwell Publishing Ltd</copyright><eventGroup><event date="2012-02-11" type="manuscriptReceived"></event><event date="2012-10-30" type="manuscriptAccepted"></event><event agent="SPS" date="2012-12-04" type="xmlCreated"></event><event type="publishedOnlineAccepted" date="2012-11-22"></event><event type="publishedOnlineEarlyUnpaginated" date="2013-01-03"></event><event type="firstOnline" date="2013-01-03"></event><event type="publishedOnlineFinalForm" date="2013-03-11"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-02-10"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.6.4 mode:FullText" date="2015-10-04"></event></eventGroup><numberingGroup><numbering type="pageFirst">151</numbering><numbering type="pageLast">159</numbering></numberingGroup><correspondenceTo>Correspondence: Professor Omar Saddiqi, Geology, Uni. Hassan II Casablanca, BP 5366 MAARIF, Casablanca 20000, Morocco. Tel.: +00212661413712; fax: +00212522230674; e‐mail: <email>omarsaddiqi@yahoo.fr</email></correspondenceTo><selfCitationGroup><citation type="self" xml:id="ter12019-cit-1000"><journalTitle>Terra Nova</journalTitle>, <vol>25</vol>, <pageFirst>151</pageFirst>–<pageLast>159</pageLast>, <pubYear year="2013">2013</pubYear></citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:TER.TER12019.pdf"></link></linkGroup></publicationMeta><contentMeta><titleGroup><title type="main">Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology</title><title type="shortAuthors">M. Oukassou <i>et al</i>.</title></titleGroup><creators><creator affiliationRef="#ter12019-aff-0001" creatorRole="author" xml:id="ter12019-cr-0001"><personName><givenNames>Mostafa</givenNames> <familyName>Oukassou</familyName></personName></creator><creator affiliationRef="#ter12019-aff-0001" corresponding="yes" creatorRole="author" xml:id="ter12019-cr-0002"><personName><givenNames>Omar</givenNames> <familyName>Saddiqi</familyName></personName></creator><creator affiliationRef="#ter12019-aff-0002" creatorRole="author" xml:id="ter12019-cr-0003"><personName><givenNames>Jocelyn</givenNames> <familyName>Barbarand</familyName></personName></creator><creator affiliationRef="#ter12019-aff-0001" creatorRole="author" xml:id="ter12019-cr-0004"><personName><givenNames>Samira</givenNames> <familyName>Sebti</familyName></personName></creator><creator affiliationRef="#ter12019-aff-0001" creatorRole="author" xml:id="ter12019-cr-0005"><personName><givenNames>Lahssen</givenNames> <familyName>Baidder</familyName></personName></creator><creator affiliationRef="#ter12019-aff-0003" creatorRole="author" xml:id="ter12019-cr-0006"><personName><givenNames>André</givenNames> <familyName>Michard</familyName></personName></creator></creators><affiliationGroup><affiliation countryCode="MA" type="organization" xml:id="ter12019-aff-0001"><orgDiv>Laboratoire «Géosciences»</orgDiv> <orgName>Faculté des Sciences</orgName> <orgName>Université Hassan II</orgName> <address><postCode>BP 5366 Maârif</postCode> <city>Casablanca</city> <country>Maroc</country></address></affiliation><affiliation countryCode="FR" type="organization" xml:id="ter12019-aff-0002"><orgName>Université Paris‐Sud</orgName> <address><street>UMR CNRS‐UPS 8148 IDES</street> <city>Bâtiment 504</city> <postCode>91405</postCode> <city>Orsay Cedex</city> <country>France</country></address></affiliation><affiliation countryCode="FR" type="organization" xml:id="ter12019-aff-0003"><orgName>Paris XI University</orgName> <address><street>10 rue des Jeûneurs</street> <postCode>75002</postCode> <city>Paris</city> <country>France</country></address></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:id="ter12019-abs-0001" xml:lang="en"><title type="main">Abstract</title><p>The origin of the Anti‐Atlas relief is one of the currently debated issues of Moroccan geology. To constrain the post‐Variscan evolution of the Central Anti‐Atlas, we collected nine samples from the Precambrian basement of the Bou Azzer‐El Graara inlier for zircon and apatite fission‐track thermochronology. Zircon ages cluster between 340 ± 20 and 306 ± 20 Ma, whereas apatite ages range from 171 ± 7 Ma to 133 ± 5 Ma. Zircon ages reflect the thermal effect of the Variscan orogeny (tectonic thickening of the <i>ca</i>. 7 km‐thick Paleozoic series), likely enhanced by fluid advection. Apatite ages record a complex Mesozoic–Cenozoic exhumation history. Track length modelling yields evidence that, (i) the Precambrian basement was still buried at <i>ca</i>. 5 km depth by Permian times, (ii) the Central Anti‐Atlas was subjected to (erosional) exhumation during the Triassic‐Early Cretaceous, then buried beneath <i>ca</i>. 1.5 km‐thick Cretaceous‐Paleogene deposits, (iii) final exhumation took place during the Neogene, contemporaneously with that of the High Atlas.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology</title></titleInfo><name type="personal"><namePart type="given">Mostafa</namePart><namePart type="family">Oukassou</namePart><affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Omar</namePart><namePart type="family">Saddiqi</namePart><affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</affiliation><description>Correspondence: Professor Omar Saddiqi, Geology, Uni. Hassan II Casablanca, BP 5366 MAARIF, Casablanca 20000, Morocco. Tel.: +00212661413712; fax: +00212522230674; e‐mail: </description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jocelyn</namePart><namePart type="family">Barbarand</namePart><affiliation>Université Paris‐Sud, UMR CNRS‐UPS 8148 IDES, 91405, Bâtiment 504Orsay Cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Samira</namePart><namePart type="family">Sebti</namePart><affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Lahssen</namePart><namePart type="family">Baidder</namePart><affiliation>Laboratoire «Géosciences», Faculté des Sciences, Université Hassan II, BP 5366 Maârif, Casablanca, Maroc</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">André</namePart><namePart type="family">Michard</namePart><affiliation>Paris XI University, 10 rue des Jeûneurs, 75002, Paris, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">2013-04</dateIssued><dateCreated encoding="w3cdtf">2012-12-04</dateCreated><dateCaptured encoding="w3cdtf">2012-02-11</dateCaptured><dateValid encoding="w3cdtf">2012-10-30</dateValid><edition>Terra Nova, 25, 151–159, 2013</edition><copyrightDate encoding="w3cdtf">2013</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The origin of the Anti‐Atlas relief is one of the currently debated issues of Moroccan geology. To constrain the post‐Variscan evolution of the Central Anti‐Atlas, we collected nine samples from the Precambrian basement of the Bou Azzer‐El Graara inlier for zircon and apatite fission‐track thermochronology. Zircon ages cluster between 340 ± 20 and 306 ± 20 Ma, whereas apatite ages range from 171 ± 7 Ma to 133 ± 5 Ma. Zircon ages reflect the thermal effect of the Variscan orogeny (tectonic thickening of the ca. 7 km‐thick Paleozoic series), likely enhanced by fluid advection. Apatite ages record a complex Mesozoic–Cenozoic exhumation history. Track length modelling yields evidence that, (i) the Precambrian basement was still buried at ca. 5 km depth by Permian times, (ii) the Central Anti‐Atlas was subjected to (erosional) exhumation during the Triassic‐Early Cretaceous, then buried beneath ca. 1.5 km‐thick Cretaceous‐Paleogene deposits, (iii) final exhumation took place during the Neogene, contemporaneously with that of the High Atlas.</abstract><relatedItem type="host"><titleInfo><title>Terra Nova</title></titleInfo><titleInfo type="abbreviated"><title>Terra Nova</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Paper</topic></subject><identifier type="ISSN">0954-4879</identifier><identifier type="eISSN">1365-3121</identifier><identifier type="DOI">10.1111/(ISSN)1365-3121</identifier><identifier type="PublisherID">TER</identifier><part><date>2013</date><detail type="volume"><caption>vol.</caption><number>25</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>151</start><end>159</end><total>9</total></extent></part></relatedItem><identifier type="istex">A52B048C83D2D1DEAE281CBD0766AEA1F69008EF</identifier><identifier type="DOI">10.1111/ter.12019</identifier><identifier type="ArticleID">TER12019</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2013 Blackwell Publishing Ltd© 2012 Blackwell Publishing Ltd</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/CobaltMaghrebV1/Data/Istex/Corpus
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000027 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Corpus/biblio.hfd -nk 000027 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= CobaltMaghrebV1
|flux= Istex
|étape= Corpus
|type= RBID
|clé= ISTEX:A52B048C83D2D1DEAE281CBD0766AEA1F69008EF
|texte= Post‐Variscan exhumation of the Central Anti‐Atlas (Morocco) constrained by zircon and apatite fission‐track thermochronology
}}
| This area was generated with Dilib version V0.6.32. |  |