Variations in amount and direction of seafloor spreading along the northeast Atlantic Ocean and resulting deformation of the continental margin of northwest Europe
Identifieur interne : 000634 ( Istex/Corpus ); précédent : 000633; suivant : 000635Variations in amount and direction of seafloor spreading along the northeast Atlantic Ocean and resulting deformation of the continental margin of northwest Europe
Auteurs : E. Le Breton ; P. R. Cobbold ; O. Dauteuil ; G. LewisSource :
- Tectonics [ 0278-7407 ] ; 2012-10.
Abstract
The NE Atlantic Ocean opened progressively between Greenland and NW Europe during the Cenozoic. Seafloor spreading occurred along three ridge systems: the Reykjanes Ridge south of Iceland, the Mohns Ridge north of the Jan Mayen Fracture Zone (JMFZ), and the Aegir and Kolbeinsey Ridges between Iceland and the JMFZ. At the same time, compressional structures developed along the continental margin of NW Europe. We investigate how these compressional structures may have resulted from variations in the amount and direction of seafloor spreading along the ridge system. Assuming that Greenland is rigid and stationary, we have used a least squares method of palinspastic restoration to calculate differences in direction and rate of spreading along the Reykjanes, Kolbeinsey/Aegir and Mohns Ridges. The restoration generates relative rotations and displacements between the oceanic segments and predicts two main periods of left‐lateral strike slip along the main oceanic fracture zones: (1) early Eocene to late Oligocene, along the Faeroe Fracture Zone and (2) late Eocene to early Oligocene and during the Miocene, along the JMFZ. Such left‐lateral motion and relative rotation between the oceanic segments are compatible with the development of inversion structures on the Faeroe‐Rockall Plateau and Norwegian Margin at those times and probably with the initiation of the Fugløy Ridge in the Faeroe‐Shetland Basin during the Eocene and Oligocene. The Iceland Mantle Plume appears to have been in a position to generate differential seafloor spreading along the NE Atlantic and resulting deformation of the European margin.
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DOI: 10.1029/2011TC003087
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ISTEX:CA7544DFCFF268674EE7784CD3473E4EF6903B25Le document en format XML
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Le Breton</name><affiliation><mods:affiliation>Geosciences Rennes, Université de Rennes 1, CNRS, Rennes, France</mods:affiliation></affiliation><affiliation><mods:affiliation>Now at Department of Earth Sciences, Freie Universität Berlin, Berlin, Germany</mods:affiliation></affiliation></author><author><name sortKey="Cobbold, P R" sort="Cobbold, P R" uniqKey="Cobbold P" first="P. R." last="Cobbold">P. R. Cobbold</name><affiliation><mods:affiliation>Geosciences Rennes, Université de Rennes 1, CNRS, Rennes, France</mods:affiliation></affiliation></author><author><name sortKey="Dauteuil, O" sort="Dauteuil, O" uniqKey="Dauteuil O" first="O." last="Dauteuil">O. Dauteuil</name><affiliation><mods:affiliation>Geosciences Rennes, Université de Rennes 1, CNRS, Rennes, France</mods:affiliation></affiliation></author><author><name sortKey="Lewis, G" sort="Lewis, G" uniqKey="Lewis G" first="G." last="Lewis">G. Lewis</name><affiliation><mods:affiliation>Chevron Onshore Europe, Aberdeen, UK</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Tectonics</title><title level="j" type="abbrev">Tectonics</title><idno type="ISSN">0278-7407</idno><idno type="eISSN">1944-9194</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2012-10">2012-10</date><biblScope unit="volume">31</biblScope><biblScope unit="issue">5</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint><idno type="ISSN">0278-7407</idno></series><idno type="istex">CA7544DFCFF268674EE7784CD3473E4EF6903B25</idno><idno type="DOI">10.1029/2011TC003087</idno><idno type="ArticleID">2011TC003087</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0278-7407</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">The NE Atlantic Ocean opened progressively between Greenland and NW Europe during the Cenozoic. Seafloor spreading occurred along three ridge systems: the Reykjanes Ridge south of Iceland, the Mohns Ridge north of the Jan Mayen Fracture Zone (JMFZ), and the Aegir and Kolbeinsey Ridges between Iceland and the JMFZ. At the same time, compressional structures developed along the continental margin of NW Europe. We investigate how these compressional structures may have resulted from variations in the amount and direction of seafloor spreading along the ridge system. Assuming that Greenland is rigid and stationary, we have used a least squares method of palinspastic restoration to calculate differences in direction and rate of spreading along the Reykjanes, Kolbeinsey/Aegir and Mohns Ridges. The restoration generates relative rotations and displacements between the oceanic segments and predicts two main periods of left‐lateral strike slip along the main oceanic fracture zones: (1) early Eocene to late Oligocene, along the Faeroe Fracture Zone and (2) late Eocene to early Oligocene and during the Miocene, along the JMFZ. Such left‐lateral motion and relative rotation between the oceanic segments are compatible with the development of inversion structures on the Faeroe‐Rockall Plateau and Norwegian Margin at those times and probably with the initiation of the Fugløy Ridge in the Faeroe‐Shetland Basin during the Eocene and Oligocene. The Iceland Mantle Plume appears to have been in a position to generate differential seafloor spreading along the NE Atlantic and resulting deformation of the European margin.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>E. 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American Geophysical Union. All Rights Reserved.</p></availability><date>2012</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Variations in amount and direction of seafloor spreading along the northeast Atlantic Ocean and resulting deformation of the continental margin of northwest Europe</title><author xml:id="author-1"><persName><forename type="first">E.</forename><surname>Le Breton</surname></persName><note type="correspondence"><p>Correspondence: Corresponding author: E. Le Breton, Department of Earth Sciences, Freie Universität Berlin, Malterserstr. 74‐100, 12249 Berlin, Germany. )</p></note><affiliation>Geosciences Rennes, Université de Rennes 1, CNRS, Rennes, France</affiliation><affiliation>Now at Department of Earth Sciences, Freie Universität Berlin, Berlin, Germany</affiliation></author><author xml:id="author-2"><persName><forename type="first">P. 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Seafloor spreading occurred along three ridge systems: the Reykjanes Ridge south of Iceland, the Mohns Ridge north of the Jan Mayen Fracture Zone (JMFZ), and the Aegir and Kolbeinsey Ridges between Iceland and the JMFZ. At the same time, compressional structures developed along the continental margin of NW Europe. We investigate how these compressional structures may have resulted from variations in the amount and direction of seafloor spreading along the ridge system. Assuming that Greenland is rigid and stationary, we have used a least squares method of palinspastic restoration to calculate differences in direction and rate of spreading along the Reykjanes, Kolbeinsey/Aegir and Mohns Ridges. The restoration generates relative rotations and displacements between the oceanic segments and predicts two main periods of left‐lateral strike slip along the main oceanic fracture zones: (1) early Eocene to late Oligocene, along the Faeroe Fracture Zone and (2) late Eocene to early Oligocene and during the Miocene, along the JMFZ. Such left‐lateral motion and relative rotation between the oceanic segments are compatible with the development of inversion structures on the Faeroe‐Rockall Plateau and Norwegian Margin at those times and probably with the initiation of the Fugløy Ridge in the Faeroe‐Shetland Basin during the Eocene and Oligocene. The Iceland Mantle Plume appears to have been in a position to generate differential seafloor spreading along the NE Atlantic and resulting deformation of the European margin.</p></abstract><abstract style="short"><p>Palinspastic restoration of the opening of the NE Atlantic Differential seafloor spreading generates displacements along transform faults Left‐lateral motion along transform faults and deformation of NW European Margin</p></abstract><textClass><keywords scheme="keyword"><list><head>keywords</head><item><term>European Margin</term></item><item><term>Iceland Mantle Plume</term></item><item><term>compression</term></item><item><term>fracture zones</term></item><item><term>northeast Atlantic</term></item><item><term>seafloor spreading</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>index-terms</head><item><term>GEOCHEMISTRY</term></item><item><term>Mid‐oceanic ridge processes</term></item><item><term>Intra‐plate processes</term></item><item><term>GEODESY AND GRAVITY</term></item><item><term>Earth's interior: composition and state</term></item><item><term>MARINE GEOLOGY AND GEOPHYSICS</term></item><item><term>Plate tectonics</term></item><item><term>Plate tectonics</term></item><item><term>MINERALOGY AND PETROLOGY</term></item><item><term>Mid‐oceanic ridge processes</term></item><item><term>Intra‐plate processes</term></item><item><term>TECTONOPHYSICS</term></item><item><term>Continental margins: divergent</term></item><item><term>Plate boundary: general</term></item><item><term>Plate motions: general</term></item><item><term>Earth's interior: composition and state</term></item><item><term>VOLCANOLOGY</term></item><item><term>Mid‐oceanic ridge processes</term></item><item><term>Intra‐plate processes</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2011-12-22">Received</change><change when="2012-08-31">Registration</change><change when="2012-10">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/CA7544DFCFF268674EE7784CD3473E4EF6903B25/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:lang="en" xml:id="tect2359"><header><publicationMeta level="product"><doi>10.1002/(ISSN)1944-9194</doi><issn type="print">0278-7407</issn><issn type="electronic">1944-9194</issn><idGroup><id type="product" value="TECT"></id><id type="coden" value="TCTNDM"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="TECTONICS">Tectonics</title><title type="short">Tectonics</title></titleGroup></publicationMeta><publicationMeta level="part" position="50"><doi>10.1002/tect.v31.5</doi><numberingGroup><numbering type="journalVolume" number="31">31</numbering><numbering type="journalIssue">5</numbering></numberingGroup><coverDate startDate="2012-10">October 2012</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="80" status="forIssue"><doi>10.1029/2011TC003087</doi><idGroup><id type="editorialOffice" value="2011TC003087"></id><id type="society" value="TC5006"></id><id type="unit" value="TECT2359"></id></idGroup><countGroup><count type="pageTotal" number="16"></count></countGroup><copyright ownership="thirdParty">©2012. American Geophysical Union. All Rights Reserved.</copyright><eventGroup><event type="manuscriptReceived" date="2011-12-22"></event><event type="manuscriptRevised" date="2012-08-16"></event><event type="manuscriptAccepted" date="2012-08-31"></event><event type="firstOnline" date="2012-10-16"></event><event type="publishedOnlineFinalForm" date="2012-10-16"></event><event type="xmlConverted" agent="SPi Global Converter:AGUv5.2_TO_WileyML3Gv1.0.3 version:1.3; WileyML 3G Packaging Tool v1.0" date="2013-03-08"></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:4.3.4 mode:FullText" date="2015-02-24"></event></eventGroup><numberingGroup><numbering type="pageFirst">n/a</numbering><numbering type="pageLast">n/a</numbering></numberingGroup><correspondenceTo>Corresponding author: E. Le Breton, Department of Earth Sciences, Freie Universität Berlin, Malterserstr. 74‐100, 12249 Berlin, Germany. <email normalForm="(eline.lebreton@fu-berlin.de)">(eline.lebreton@fu‐berlin.de</email>)</correspondenceTo><subjectInfo><subject href="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/1032">Mid‐oceanic ridge processes</subject><subject href="http://psi.agu.org/taxonomy5/1033">Intra‐plate processes</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/1200">GEODESY AND GRAVITY</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/1212">Earth's interior: composition and state</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3040">Plate tectonics</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3040">Plate tectonics</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3600">MINERALOGY AND PETROLOGY</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3614">Mid‐oceanic ridge processes</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3615">Intra‐plate processes</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/8100">TECTONOPHYSICS</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/8105">Continental margins: divergent</subject><subject href="http://psi.agu.org/taxonomy5/8150">Plate boundary: general</subject><subject href="http://psi.agu.org/taxonomy5/8155">Plate motions: general</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8124">Earth's interior: composition and state</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8416">Mid‐oceanic ridge processes</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8415">Intra‐plate processes</subject></subjectInfo></subjectInfo><selfCitationGroup><citation xml:id="tect2359-cit-0000" type="self"><author><familyName>Le Breton</familyName>, <givenNames>E.</givenNames></author>, <author><givenNames>P. R.</givenNames> <familyName>Cobbold</familyName></author>, <author><givenNames>O.</givenNames> <familyName>Dauteuil</familyName></author>, and <author><givenNames>G.</givenNames> <familyName>Lewis</familyName></author> (<pubYear year="2012">2012</pubYear>), <articleTitle>Variations in amount and direction of seafloor spreading along the northeast Atlantic Ocean and resulting deformation of the continental margin of northwest Europe</articleTitle>, <journalTitle>Tectonics</journalTitle>, <vol>31</vol>, TC5006, doi:<accessionId ref="info:doi/10.1029/2011TC003087">10.1029/2011TC003087</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:TECT.TECT2359.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="wordTotal" number="11000"></count><count type="figureTotal" number="11"></count></countGroup><titleGroup><title type="main">Variations in amount and direction of seafloor spreading along the northeast Atlantic Ocean and resulting deformation of the continental margin of northwest Europe</title><title type="shortAuthors">LE BRETON ET AL.</title><title type="short">DIFFERENTIAL SPREADING, NE ATLANTIC</title></titleGroup><creators><creator xml:id="tect2359-cr-0001" creatorRole="author" affiliationRef="#tect2359-aff-0001 #tect2359-aff-0002" corresponding="yes"><personName><givenNames>E.</givenNames><familyName>Le Breton</familyName></personName><contactDetails><email normalForm="eline.lebreton@univ-rennes1.fr">eline.lebreton@univ‐rennes1.fr</email></contactDetails></creator><creator xml:id="tect2359-cr-0002" creatorRole="author" affiliationRef="#tect2359-aff-0001"><personName><givenNames>P. R.</givenNames><familyName>Cobbold</familyName></personName></creator><creator xml:id="tect2359-cr-0003" creatorRole="author" affiliationRef="#tect2359-aff-0001"><personName><givenNames>O.</givenNames><familyName>Dauteuil</familyName></personName></creator><creator xml:id="tect2359-cr-0004" creatorRole="author" affiliationRef="#tect2359-aff-0003"><personName><givenNames>G.</givenNames><familyName>Lewis</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="tect2359-aff-0001" countryCode="FR" type="organization"><unparsedAffiliation>Geosciences Rennes, Université de Rennes 1, CNRS, Rennes, France</unparsedAffiliation></affiliation><affiliation xml:id="tect2359-aff-0002" countryCode="DE" type="organization"><unparsedAffiliation>Now at Department of Earth Sciences, Freie Universität Berlin, Berlin, Germany</unparsedAffiliation></affiliation><affiliation xml:id="tect2359-aff-0003" countryCode="GB" type="organization"><unparsedAffiliation>Chevron Onshore Europe, Aberdeen, UK</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="tect2359-kwd-0001">European Margin</keyword><keyword xml:id="tect2359-kwd-0002">Iceland Mantle Plume</keyword><keyword xml:id="tect2359-kwd-0003">compression</keyword><keyword xml:id="tect2359-kwd-0004">fracture zones</keyword><keyword xml:id="tect2359-kwd-0005">northeast Atlantic</keyword><keyword xml:id="tect2359-kwd-0006">seafloor spreading</keyword></keywordGroup><supportingInformation xml:id="tect2359-sup-0000"><p xml:id="tect2359-para-0001">Auxiliary material for this article contains plots of geographic coordinates (WGS 1984) of NE Atlantic isochrons and fracture zones, the G values for the restorations, and the best fit rotation poles and their uncertainties for each spreading system for both models.</p><p xml:id="tect2359-para-0002">Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac).</p><p xml:id="tect2359-para-0003">Additional file information is provided in the readme.txt.</p><supportingInfoItem><mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:02787407:media:tect2359:tect2359-sup-0001-readme"></mediaResource><caption>readme.txt</caption></supportingInfoItem><supportingInfoItem xml:id="tect2359-sup-0001"><mediaResource alt="supplementary data" mimeType="application/pdf" href="urn-x:wiley:02787407:media:tect2359:tect2359-sup-0002-ds01"></mediaResource><caption>Data Set S1. Geographic coordinates (WGS 1984) of NE Atlantic isochrons and fracture zones.</caption></supportingInfoItem><supportingInfoItem xml:id="tect2359-sup-0002"><mediaResource alt="supplementary data" mimeType="application/pdf" href="urn-x:wiley:02787407:media:tect2359:tect2359-sup-0003-txts01"></mediaResource><caption>Text S1. Plots of restoration of the opening of the NE Atlantic for 13 stages for each restoration, calculation of the G values for the restorations, and tables of the best fit rotation poles and their uncertainties for each spreading system for both models.</caption></supportingInfoItem></supportingInformation><abstractGroup><abstract type="main"><p xml:id="tect2359-para-0004" label="1">The NE Atlantic Ocean opened progressively between Greenland and NW Europe during the Cenozoic. Seafloor spreading occurred along three ridge systems: the Reykjanes Ridge south of Iceland, the Mohns Ridge north of the Jan Mayen Fracture Zone (JMFZ), and the Aegir and Kolbeinsey Ridges between Iceland and the JMFZ. At the same time, compressional structures developed along the continental margin of NW Europe. We investigate how these compressional structures may have resulted from variations in the amount and direction of seafloor spreading along the ridge system. Assuming that Greenland is rigid and stationary, we have used a least squares method of palinspastic restoration to calculate differences in direction and rate of spreading along the Reykjanes, Kolbeinsey/Aegir and Mohns Ridges. The restoration generates relative rotations and displacements between the oceanic segments and predicts two main periods of left‐lateral strike slip along the main oceanic fracture zones: (1) early Eocene to late Oligocene, along the Faeroe Fracture Zone and (2) late Eocene to early Oligocene and during the Miocene, along the JMFZ. Such left‐lateral motion and relative rotation between the oceanic segments are compatible with the development of inversion structures on the Faeroe‐Rockall Plateau and Norwegian Margin at those times and probably with the initiation of the Fugløy Ridge in the Faeroe‐Shetland Basin during the Eocene and Oligocene. The Iceland Mantle Plume appears to have been in a position to generate differential seafloor spreading along the NE Atlantic and resulting deformation of the European margin.</p></abstract><abstract type="short"><title type="main">Key Points</title><p xml:id="tect2359-para-0005"><list style="bulleted"><listItem>Palinspastic restoration of the opening of the NE Atlantic</listItem><listItem>Differential seafloor spreading generates displacements along transform faults</listItem><listItem>Left‐lateral motion along transform faults and deformation of NW European Margin</listItem></list></p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Variations in amount and direction of seafloor spreading along the northeast Atlantic Ocean and resulting deformation of the continental margin of northwest Europe</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>DIFFERENTIAL SPREADING, NE ATLANTIC</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Variations in amount and direction of seafloor spreading along the northeast Atlantic Ocean and resulting deformation of the continental margin of northwest Europe</title></titleInfo><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Le Breton</namePart><affiliation>Geosciences Rennes, Université de Rennes 1, CNRS, Rennes, France</affiliation><affiliation>Now at Department of Earth Sciences, Freie Universität Berlin, Berlin, Germany</affiliation><description>Correspondence: Corresponding author: E. Le Breton, Department of Earth Sciences, Freie Universität Berlin, Malterserstr. 74‐100, 12249 Berlin, Germany. )</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P. R.</namePart><namePart type="family">Cobbold</namePart><affiliation>Geosciences Rennes, Université de Rennes 1, CNRS, Rennes, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">O.</namePart><namePart type="family">Dauteuil</namePart><affiliation>Geosciences Rennes, Université de Rennes 1, CNRS, Rennes, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Lewis</namePart><affiliation>Chevron Onshore Europe, Aberdeen, UK</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">2012-10</dateIssued><dateCaptured encoding="w3cdtf">2011-12-22</dateCaptured><dateValid encoding="w3cdtf">2012-08-31</dateValid><edition>Le Breton, E., P. R. Cobbold, O. Dauteuil, and G. Lewis (2012), Variations in amount and direction of seafloor spreading along the northeast Atlantic Ocean and resulting deformation of the continental margin of northwest Europe, Tectonics, 31, TC5006, doi:10.1029/2011TC003087.</edition><copyrightDate encoding="w3cdtf">2012</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">11</extent><extent unit="words">11000</extent></physicalDescription><abstract>The NE Atlantic Ocean opened progressively between Greenland and NW Europe during the Cenozoic. Seafloor spreading occurred along three ridge systems: the Reykjanes Ridge south of Iceland, the Mohns Ridge north of the Jan Mayen Fracture Zone (JMFZ), and the Aegir and Kolbeinsey Ridges between Iceland and the JMFZ. At the same time, compressional structures developed along the continental margin of NW Europe. We investigate how these compressional structures may have resulted from variations in the amount and direction of seafloor spreading along the ridge system. Assuming that Greenland is rigid and stationary, we have used a least squares method of palinspastic restoration to calculate differences in direction and rate of spreading along the Reykjanes, Kolbeinsey/Aegir and Mohns Ridges. The restoration generates relative rotations and displacements between the oceanic segments and predicts two main periods of left‐lateral strike slip along the main oceanic fracture zones: (1) early Eocene to late Oligocene, along the Faeroe Fracture Zone and (2) late Eocene to early Oligocene and during the Miocene, along the JMFZ. Such left‐lateral motion and relative rotation between the oceanic segments are compatible with the development of inversion structures on the Faeroe‐Rockall Plateau and Norwegian Margin at those times and probably with the initiation of the Fugløy Ridge in the Faeroe‐Shetland Basin during the Eocene and Oligocene. The Iceland Mantle Plume appears to have been in a position to generate differential seafloor spreading along the NE Atlantic and resulting deformation of the European margin.</abstract><abstract type="short">Palinspastic restoration of the opening of the NE Atlantic Differential seafloor spreading generates displacements along transform faults Left‐lateral motion along transform faults and deformation of NW European Margin</abstract><subject><genre>keywords</genre><topic>European Margin</topic><topic>Iceland Mantle Plume</topic><topic>compression</topic><topic>fracture zones</topic><topic>northeast Atlantic</topic><topic>seafloor spreading</topic></subject><relatedItem type="host"><titleInfo><title>Tectonics</title></titleInfo><titleInfo type="abbreviated"><title>Tectonics</title></titleInfo><genre type="journal">journal</genre><note type="content"> Auxiliary material for this article contains plots of geographic coordinates (WGS 1984) of NE Atlantic isochrons and fracture zones, the G values for the restorations, and the best fit rotation poles and their uncertainties for each spreading system for both models. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). Additional file information is provided in the readme.txt. Auxiliary material for this article contains plots of geographic coordinates (WGS 1984) of NE Atlantic isochrons and fracture zones, the G values for the restorations, and the best fit rotation poles and their uncertainties for each spreading system for both models. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). Additional file information is provided in the readme.txt. Auxiliary material for this article contains plots of geographic coordinates (WGS 1984) of NE Atlantic isochrons and fracture zones, the G values for the restorations, and the best fit rotation poles and their uncertainties for each spreading system for both models. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). Additional file information is provided in the readme.txt.Supporting Info Item: readme.txt - Data Set S1. Geographic coordinates (WGS 1984) of NE Atlantic isochrons and fracture zones. - Text S1. Plots of restoration of the opening of the NE Atlantic for 13 stages for each restoration, calculation of the G values for the restorations, and tables of the best fit rotation poles and their uncertainties for each spreading system for both models. - </note><subject><genre>index-terms</genre><topic authorityURI="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1032">Mid‐oceanic ridge processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1033">Intra‐plate processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1200">GEODESY AND GRAVITY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1212">Earth's interior: composition and state</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3040">Plate tectonics</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3040">Plate tectonics</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3600">MINERALOGY AND PETROLOGY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3614">Mid‐oceanic ridge processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3615">Intra‐plate processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8100">TECTONOPHYSICS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8105">Continental margins: divergent</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8150">Plate boundary: general</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8155">Plate motions: general</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8124">Earth's interior: composition and state</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8416">Mid‐oceanic ridge processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8415">Intra‐plate processes</topic></subject><identifier type="ISSN">0278-7407</identifier><identifier type="eISSN">1944-9194</identifier><identifier type="DOI">10.1002/(ISSN)1944-9194</identifier><identifier type="CODEN">TCTNDM</identifier><identifier type="PublisherID">TECT</identifier><part><date>2012</date><detail type="volume"><caption>vol.</caption><number>31</number></detail><detail type="issue"><caption>no.</caption><number>5</number></detail><extent unit="pages"><start>n/a</start><end>n/a</end><total>16</total></extent></part></relatedItem><identifier type="istex">CA7544DFCFF268674EE7784CD3473E4EF6903B25</identifier><identifier type="DOI">10.1029/2011TC003087</identifier><identifier type="ArticleID">2011TC003087</identifier><accessCondition type="use and reproduction" contentType="copyright">©2012. American Geophysical Union. All Rights Reserved.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><enrichments><json:item><type>multicat</type><uri>https://api.istex.fr/document/CA7544DFCFF268674EE7784CD3473E4EF6903B25/enrichments/multicat</uri></json:item></enrichments><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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