Mantle provinces under North America from multifrequency P wave tomography
Identifieur interne : 000701 ( Istex/Corpus ); précédent : 000700; suivant : 000702Mantle provinces under North America from multifrequency P wave tomography
Auteurs : Karin SiglochSource :
- Geochemistry, Geophysics, Geosystems [ 1525-2027 ] ; 2011-02.
Abstract
This is a survey of mantle provinces (large‐scale seismic anomalies) under North America, from the surface down to 1500–1800 km depth. The underlying P velocity model was obtained by multifrequency tomography, a waveform‐based method that systematically measures and models the frequency‐dependence of teleseismic body waves. A novel kind of three‐dimensional rendering technique is used to make the considerable structural complexities under North America accessible. In the transition zone and below, the North American mantle is dominated by seismically fast provinces, which represent distinct subduction episodes of the Farallon plate. I attempt to date and interpret the various slab fragments by reconciling their present positions with paleotrench locations from plate tectonic reconstructions and with major geologic surface episodes. Differences in vertical sinking velocity have led to large vertical offsets across adjacent, coeval slabs. Some of the mantle provinces have not been discussed much previously, including (1) a seismically slow blanket overlying the oldest Farallon subduction along the eastern continental margin, (2) a transition zone slab coeval with the Laramide orogeny (ca. 80–60 Myr), which I discuss in analogy to the “stagnant slab” subduction style commonly found in the western Pacific today, (3) the lower mantle root of present‐day Cascadia subduction, which may have started out as intraoceanic subduction,(4) a lower mantle slab under Arizona and New Mexico, the last material to subduct before strike‐slip motion developed along the San Andreas boundary, and (5) two narrow plate tears thousands of kilometers long, one of which is the subducted conjugate of the Mendocino Fracture Zone.
Url:
DOI: 10.1029/2010GC003421
Links to Exploration step
ISTEX:853A844AE56D4803E672B9550513C8161044F602Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Mantle provinces under North America from multifrequency P wave tomography</title><author><name sortKey="Sigloch, Karin" sort="Sigloch, Karin" uniqKey="Sigloch K" first="Karin" last="Sigloch">Karin Sigloch</name><affiliation><mods:affiliation>Department of Earth and Environmental Sciences, Ludwig‐Maximilians‐Universität, Theresienstrasse 41,, D‐80333, Munich, Germany</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: sigloch@geophysik.uni-muenchen.de</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:853A844AE56D4803E672B9550513C8161044F602</idno><date when="2011" year="2011">2011</date><idno type="doi">10.1029/2010GC003421</idno><idno type="url">https://api.istex.fr/document/853A844AE56D4803E672B9550513C8161044F602/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000701</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Mantle provinces under North America from multifrequency P wave tomography</title><author><name sortKey="Sigloch, Karin" sort="Sigloch, Karin" uniqKey="Sigloch K" first="Karin" last="Sigloch">Karin Sigloch</name><affiliation><mods:affiliation>Department of Earth and Environmental Sciences, Ludwig‐Maximilians‐Universität, Theresienstrasse 41,, D‐80333, Munich, Germany</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: sigloch@geophysik.uni-muenchen.de</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Geochemistry, Geophysics, Geosystems</title><title level="j" type="abbrev">Geochem. Geophys. Geosyst.</title><idno type="ISSN">1525-2027</idno><idno type="eISSN">1525-2027</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2011-02">2011-02</date><biblScope unit="volume">12</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint><idno type="ISSN">1525-2027</idno></series><idno type="istex">853A844AE56D4803E672B9550513C8161044F602</idno><idno type="DOI">10.1029/2010GC003421</idno><idno type="ArticleID">2010GC003421</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1525-2027</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">This is a survey of mantle provinces (large‐scale seismic anomalies) under North America, from the surface down to 1500–1800 km depth. The underlying P velocity model was obtained by multifrequency tomography, a waveform‐based method that systematically measures and models the frequency‐dependence of teleseismic body waves. A novel kind of three‐dimensional rendering technique is used to make the considerable structural complexities under North America accessible. In the transition zone and below, the North American mantle is dominated by seismically fast provinces, which represent distinct subduction episodes of the Farallon plate. I attempt to date and interpret the various slab fragments by reconciling their present positions with paleotrench locations from plate tectonic reconstructions and with major geologic surface episodes. Differences in vertical sinking velocity have led to large vertical offsets across adjacent, coeval slabs. Some of the mantle provinces have not been discussed much previously, including (1) a seismically slow blanket overlying the oldest Farallon subduction along the eastern continental margin, (2) a transition zone slab coeval with the Laramide orogeny (ca. 80–60 Myr), which I discuss in analogy to the “stagnant slab” subduction style commonly found in the western Pacific today, (3) the lower mantle root of present‐day Cascadia subduction, which may have started out as intraoceanic subduction,(4) a lower mantle slab under Arizona and New Mexico, the last material to subduct before strike‐slip motion developed along the San Andreas boundary, and (5) two narrow plate tears thousands of kilometers long, one of which is the subducted conjugate of the Mendocino Fracture Zone.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Karin Sigloch</name><affiliations><json:string>Department of Earth and Environmental Sciences, Ludwig‐Maximilians‐Universität, Theresienstrasse 41,, D‐80333, Munich, Germany</json:string><json:string>E-mail: sigloch@geophysik.uni-muenchen.de</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>seismic tomography</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>mantle structure</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>North America</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Farallon plate</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>computational seismology</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>finite frequency</value></json:item></subject><articleId><json:string>2010GC003421</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>This is a survey of mantle provinces (large‐scale seismic anomalies) under North America, from the surface down to 1500–1800 km depth. The underlying P velocity model was obtained by multifrequency tomography, a waveform‐based method that systematically measures and models the frequency‐dependence of teleseismic body waves. A novel kind of three‐dimensional rendering technique is used to make the considerable structural complexities under North America accessible. In the transition zone and below, the North American mantle is dominated by seismically fast provinces, which represent distinct subduction episodes of the Farallon plate. I attempt to date and interpret the various slab fragments by reconciling their present positions with paleotrench locations from plate tectonic reconstructions and with major geologic surface episodes. Differences in vertical sinking velocity have led to large vertical offsets across adjacent, coeval slabs. Some of the mantle provinces have not been discussed much previously, including (1) a seismically slow blanket overlying the oldest Farallon subduction along the eastern continental margin, (2) a transition zone slab coeval with the Laramide orogeny (ca. 80–60 Myr), which I discuss in analogy to the “stagnant slab” subduction style commonly found in the western Pacific today, (3) the lower mantle root of present‐day Cascadia subduction, which may have started out as intraoceanic subduction,(4) a lower mantle slab under Arizona and New Mexico, the last material to subduct before strike‐slip motion developed along the San Andreas boundary, and (5) two narrow plate tears thousands of kilometers long, one of which is the subducted conjugate of the Mendocino Fracture Zone.</abstract><qualityIndicators><score>9.5</score><pdfVersion>1.6</pdfVersion><pdfPageSize>612 x 792 pts (letter)</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>6</keywordCount><abstractCharCount>1729</abstractCharCount><pdfWordCount>13133</pdfWordCount><pdfCharCount>81677</pdfCharCount><pdfPageCount>27</pdfPageCount><abstractWordCount>252</abstractWordCount></qualityIndicators><title>Mantle provinces under North America from multifrequency P wave tomography</title><genre><json:string>article</json:string></genre><host><volume>12</volume><publisherId><json:string>GGGE</json:string></publisherId><pages><total>27</total><last>n/a</last><first>n/a</first></pages><issn><json:string>1525-2027</json:string></issn><issue>2</issue><subject><json:item><value>Plate Reconstructions, Mantle Convection, and Tomography Models: A Complementary Vision of Earth's Interior</value></json:item><json:item><value>Plate Reconstructions, Mantle Convection, and Tomography Models: A Complementary Vision of Earth's Interior</value></json:item><json:item><value>GEODESY AND GRAVITY</value></json:item><json:item><value>Earth's interior: composition and state</value></json:item><json:item><value>Earth's interior: dynamics</value></json:item><json:item><value>RADIO SCIENCE</value></json:item><json:item><value>Tomography and imaging</value></json:item><json:item><value>SEISMOLOGY</value></json:item><json:item><value>Tomography</value></json:item><json:item><value>Mantle</value></json:item><json:item><value>Body waves</value></json:item><json:item><value>TECTONOPHYSICS</value></json:item><json:item><value>Tomography</value></json:item><json:item><value>Earth's interior: composition and state</value></json:item></subject><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>1525-2027</json:string></eissn><title>Geochemistry, Geophysics, Geosystems</title><doi><json:string>10.1002/(ISSN)1525-2027</json:string></doi></host><publicationDate>2011</publicationDate><copyrightDate>2011</copyrightDate><doi><json:string>10.1029/2010GC003421</json:string></doi><id>853A844AE56D4803E672B9550513C8161044F602</id><score>0.0982067</score><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/853A844AE56D4803E672B9550513C8161044F602/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/853A844AE56D4803E672B9550513C8161044F602/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/853A844AE56D4803E672B9550513C8161044F602/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Mantle provinces under North America from multifrequency P wave tomography</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><availability><p>Copyright 2011 by the American Geophysical Union.</p></availability><date>2011</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Mantle provinces under North America from multifrequency P wave tomography</title><author xml:id="author-1"><persName><forename type="first">Karin</forename><surname>Sigloch</surname></persName><email>sigloch@geophysik.uni-muenchen.de</email><affiliation>Department of Earth and Environmental Sciences, Ludwig‐Maximilians‐Universität, Theresienstrasse 41,, D‐80333, Munich, Germany</affiliation></author></analytic><monogr><title level="j">Geochemistry, Geophysics, Geosystems</title><title level="j" type="abbrev">Geochem. Geophys. Geosyst.</title><idno type="pISSN">1525-2027</idno><idno type="eISSN">1525-2027</idno><idno type="DOI">10.1002/(ISSN)1525-2027</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2011-02"></date><biblScope unit="volume">12</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint></monogr><idno type="istex">853A844AE56D4803E672B9550513C8161044F602</idno><idno type="DOI">10.1029/2010GC003421</idno><idno type="ArticleID">2010GC003421</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2011</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>This is a survey of mantle provinces (large‐scale seismic anomalies) under North America, from the surface down to 1500–1800 km depth. The underlying P velocity model was obtained by multifrequency tomography, a waveform‐based method that systematically measures and models the frequency‐dependence of teleseismic body waves. A novel kind of three‐dimensional rendering technique is used to make the considerable structural complexities under North America accessible. In the transition zone and below, the North American mantle is dominated by seismically fast provinces, which represent distinct subduction episodes of the Farallon plate. I attempt to date and interpret the various slab fragments by reconciling their present positions with paleotrench locations from plate tectonic reconstructions and with major geologic surface episodes. Differences in vertical sinking velocity have led to large vertical offsets across adjacent, coeval slabs. Some of the mantle provinces have not been discussed much previously, including (1) a seismically slow blanket overlying the oldest Farallon subduction along the eastern continental margin, (2) a transition zone slab coeval with the Laramide orogeny (ca. 80–60 Myr), which I discuss in analogy to the “stagnant slab” subduction style commonly found in the western Pacific today, (3) the lower mantle root of present‐day Cascadia subduction, which may have started out as intraoceanic subduction,(4) a lower mantle slab under Arizona and New Mexico, the last material to subduct before strike‐slip motion developed along the San Andreas boundary, and (5) two narrow plate tears thousands of kilometers long, one of which is the subducted conjugate of the Mendocino Fracture Zone.</p></abstract><textClass><keywords scheme="keyword"><list><head>keywords</head><item><term>seismic tomography</term></item><item><term>mantle structure</term></item><item><term>North America</term></item><item><term>Farallon plate</term></item><item><term>computational seismology</term></item><item><term>finite frequency</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>index-terms</head><item><term>Plate Reconstructions, Mantle Convection, and Tomography Models: A Complementary Vision of Earth's Interior</term></item><item><term>Plate Reconstructions, Mantle Convection, and Tomography Models: A Complementary Vision of Earth's Interior</term></item><item><term>GEODESY AND GRAVITY</term></item><item><term>Earth's interior: composition and state</term></item><item><term>Earth's interior: dynamics</term></item><item><term>RADIO SCIENCE</term></item><item><term>Tomography and imaging</term></item><item><term>SEISMOLOGY</term></item><item><term>Tomography</term></item><item><term>Mantle</term></item><item><term>Body waves</term></item><item><term>TECTONOPHYSICS</term></item><item><term>Tomography</term></item><item><term>Earth's interior: composition and state</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2010-10-26">Received</change><change when="2010-12-21">Registration</change><change when="2011-02">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/853A844AE56D4803E672B9550513C8161044F602/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="ggge1901"><header><publicationMeta level="product"><doi>10.1002/(ISSN)1525-2027</doi><issn type="print">1525-2027</issn><issn type="electronic">1525-2027</issn><idGroup><id type="product" value="GGGE"></id><id type="coden" value="GGGGFR"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS">Geochemistry, Geophysics, Geosystems</title><title type="short">Geochem. Geophys. Geosyst.</title></titleGroup></publicationMeta><publicationMeta level="part" position="20"><doi>10.1002/ggge.v12.2</doi><titleGroup><title type="main" xml:lang="en" sort="GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS">Geochemistry, Geophysics, Geosystems</title></titleGroup><numberingGroup><numbering type="journalVolume" number="12">12</numbering><numbering type="journalIssue">2</numbering></numberingGroup><coverDate startDate="2011-02">February 2011</coverDate></publicationMeta><publicationMeta level="unit" position="90" type="article" status="forIssue"><doi>10.1029/2010GC003421</doi><idGroup><id type="editorialOffice" value="2010GC003421"></id><id type="society" value="Q02W08"></id><id type="unit" value="GGGE1901"></id></idGroup><countGroup><count type="pageTotal" number="27"></count></countGroup><copyright ownership="thirdParty">Copyright 2011 by the American Geophysical Union.</copyright><eventGroup><event type="manuscriptReceived" date="2010-10-26"></event><event type="manuscriptRevised" date="2010-12-08"></event><event type="manuscriptAccepted" date="2010-12-21"></event><event type="firstOnline" date="2011-02-18"></event><event type="publishedOnlineFinalForm" date="2011-02-18"></event><event type="xmlConverted" agent="SPi Global Converter:AGUv3.44_TO_WileyML3Gv1.0.3 version:1.0; AGU2WileyML3G Final Clean Up v1.0; WileyML 3G Packaging Tool v1.0" date="2012-12-23"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-26"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-16"></event></eventGroup><numberingGroup><numbering type="pageFirst">n/a</numbering><numbering type="pageLast">n/a</numbering></numberingGroup><subjectInfo><subject href="http://psi.agu.org/specialSection/TOMOGRAPH1">Plate Reconstructions, Mantle Convection, and Tomography Models: A Complementary Vision of Earth's Interior</subject><subject href="http://psi.agu.org/specialSection/TOMOGRAPH1">Plate Reconstructions, Mantle Convection, and Tomography Models: A Complementary Vision of Earth's Interior</subject><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><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/1213">Earth's interior: dynamics</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/6900">RADIO SCIENCE</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/6982">Tomography and imaging</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/7200">SEISMOLOGY</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/7270">Tomography</subject><subject href="http://psi.agu.org/taxonomy5/7208">Mantle</subject><subject href="http://psi.agu.org/taxonomy5/7203">Body waves</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/8100">TECTONOPHYSICS</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8180">Tomography</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8124">Earth's interior: composition and state</subject></subjectInfo></subjectInfo><selfCitationGroup><citation xml:id="ggge1901-cit-0000" type="self"><author><familyName>Sigloch</familyName>, <givenNames>K.</givenNames></author> (<pubYear year="2011">2011</pubYear>), <articleTitle>Mantle provinces under North America from multifrequency <i>P</i> wave tomography</articleTitle>, <journalTitle>Geochem. Geophys. Geosyst.</journalTitle>, <vol>12</vol>, Q02W08, doi:<accessionId ref="info:doi/10.1029/2010GC003421">10.1029/2010GC003421</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:GGGE.GGGE1901.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="wordTotal" number="15100"></count><count type="figureTotal" number="12"></count></countGroup><titleGroup><title type="main">Mantle provinces under North America from multifrequency <i>P</i> wave tomography</title><title type="short">MANTLE PROVINCES UNDER NORTH AMERICA</title><title type="shortAuthors">Sigloch</title></titleGroup><creators><creator creatorRole="author" xml:id="ggge1901-cr-0001" affiliationRef="#ggge1901-aff-0001"><personName><givenNames>Karin</givenNames> <familyName>Sigloch</familyName></personName><contactDetails><email normalForm="sigloch@geophysik.uni-muenchen.de">sigloch@geophysik.uni-muenchen.de</email></contactDetails></creator></creators><affiliationGroup><affiliation countryCode="DE" type="organization" xml:id="ggge1901-aff-0001"><orgDiv>Department of Earth and Environmental Sciences</orgDiv><orgName>Ludwig‐Maximilians‐Universität</orgName><address><street>Theresienstrasse 41,</street><postCode>D‐80333</postCode><city>Munich</city><country>Germany</country></address></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="ggge1901-kwd-0001">seismic tomography</keyword><keyword xml:id="ggge1901-kwd-0002">mantle structure</keyword><keyword xml:id="ggge1901-kwd-0003">North America</keyword><keyword xml:id="ggge1901-kwd-0004">Farallon plate</keyword><keyword xml:id="ggge1901-kwd-0005">computational seismology</keyword><keyword xml:id="ggge1901-kwd-0006">finite frequency</keyword></keywordGroup><supportingInformation><p xml:id="ggge1901-para-0001">Auxiliary material for this article the 3‐D tomographic model that is described in the paper.</p><p xml:id="ggge1901-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="ggge1901-para-0003">Additional file information is provided in the readme.txt.</p><supportingInfoItem><mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:15252027:media:ggge1901:ggge1901-sup-0001-readme"></mediaResource><caption>readme.txt</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="" href="urn-x:wiley:15252027:media:ggge1901:ggge1901-sup-0002-sfts01"></mediaResource><caption>Software S1. The 3‐D velocity model discussed in the paper.</caption></supportingInfoItem></supportingInformation><abstractGroup><abstract type="main"><p xml:id="ggge1901-para-0004">This is a survey of mantle provinces (large‐scale seismic anomalies) under North America, from the surface down to 1500–1800 km depth. The underlying <i>P</i> velocity model was obtained by multifrequency tomography, a waveform‐based method that systematically measures and models the frequency‐dependence of teleseismic body waves. A novel kind of three‐dimensional rendering technique is used to make the considerable structural complexities under North America accessible. In the transition zone and below, the North American mantle is dominated by seismically fast provinces, which represent distinct subduction episodes of the Farallon plate. I attempt to date and interpret the various slab fragments by reconciling their present positions with paleotrench locations from plate tectonic reconstructions and with major geologic surface episodes. Differences in vertical sinking velocity have led to large vertical offsets across adjacent, coeval slabs. Some of the mantle provinces have not been discussed much previously, including (1) a seismically slow blanket overlying the oldest Farallon subduction along the eastern continental margin, (2) a transition zone slab coeval with the Laramide orogeny (ca. 80–60 Myr), which I discuss in analogy to the “stagnant slab” subduction style commonly found in the western Pacific today, (3) the lower mantle root of present‐day Cascadia subduction, which may have started out as intraoceanic subduction,(4) a lower mantle slab under Arizona and New Mexico, the last material to subduct before strike‐slip motion developed along the San Andreas boundary, and (5) two narrow plate tears thousands of kilometers long, one of which is the subducted conjugate of the Mendocino Fracture Zone.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Mantle provinces under North America from multifrequency P wave tomography</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>MANTLE PROVINCES UNDER NORTH AMERICA</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Mantle provinces under North America from multifrequency P wave tomography</title></titleInfo><name type="personal"><namePart type="given">Karin</namePart><namePart type="family">Sigloch</namePart><affiliation>Department of Earth and Environmental Sciences, Ludwig‐Maximilians‐Universität, Theresienstrasse 41,, D‐80333, Munich, Germany</affiliation><affiliation>E-mail: sigloch@geophysik.uni-muenchen.de</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">2011-02</dateIssued><dateCaptured encoding="w3cdtf">2010-10-26</dateCaptured><dateValid encoding="w3cdtf">2010-12-21</dateValid><edition>Sigloch, K. (2011), Mantle provinces under North America from multifrequency P wave tomography, Geochem. Geophys. Geosyst., 12, Q02W08, doi:10.1029/2010GC003421.</edition><copyrightDate encoding="w3cdtf">2011</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">12</extent><extent unit="words">15100</extent></physicalDescription><abstract>This is a survey of mantle provinces (large‐scale seismic anomalies) under North America, from the surface down to 1500–1800 km depth. The underlying P velocity model was obtained by multifrequency tomography, a waveform‐based method that systematically measures and models the frequency‐dependence of teleseismic body waves. A novel kind of three‐dimensional rendering technique is used to make the considerable structural complexities under North America accessible. In the transition zone and below, the North American mantle is dominated by seismically fast provinces, which represent distinct subduction episodes of the Farallon plate. I attempt to date and interpret the various slab fragments by reconciling their present positions with paleotrench locations from plate tectonic reconstructions and with major geologic surface episodes. Differences in vertical sinking velocity have led to large vertical offsets across adjacent, coeval slabs. Some of the mantle provinces have not been discussed much previously, including (1) a seismically slow blanket overlying the oldest Farallon subduction along the eastern continental margin, (2) a transition zone slab coeval with the Laramide orogeny (ca. 80–60 Myr), which I discuss in analogy to the “stagnant slab” subduction style commonly found in the western Pacific today, (3) the lower mantle root of present‐day Cascadia subduction, which may have started out as intraoceanic subduction,(4) a lower mantle slab under Arizona and New Mexico, the last material to subduct before strike‐slip motion developed along the San Andreas boundary, and (5) two narrow plate tears thousands of kilometers long, one of which is the subducted conjugate of the Mendocino Fracture Zone.</abstract><subject><genre>keywords</genre><topic>seismic tomography</topic><topic>mantle structure</topic><topic>North America</topic><topic>Farallon plate</topic><topic>computational seismology</topic><topic>finite frequency</topic></subject><relatedItem type="host"><titleInfo><title>Geochemistry, Geophysics, Geosystems</title></titleInfo><titleInfo type="abbreviated"><title>Geochem. Geophys. Geosyst.</title></titleInfo><genre type="journal">journal</genre><note type="content"> Auxiliary material for this article the 3‐D tomographic model that is described in the paper. 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 the 3‐D tomographic model that is described in the paper. 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 the 3‐D tomographic model that is described in the paper. 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 - Software S1. The 3‐D velocity model discussed in the paper. - </note><subject><genre>index-terms</genre><topic authorityURI="http://psi.agu.org/specialSection/TOMOGRAPH1">Plate Reconstructions, Mantle Convection, and Tomography Models: A Complementary Vision of Earth's Interior</topic><topic authorityURI="http://psi.agu.org/specialSection/TOMOGRAPH1">Plate Reconstructions, Mantle Convection, and Tomography Models: A Complementary Vision of Earth's Interior</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/taxonomy5/1213">Earth's interior: dynamics</topic><topic authorityURI="http://psi.agu.org/taxonomy5/6900">RADIO SCIENCE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/6982">Tomography and imaging</topic><topic authorityURI="http://psi.agu.org/taxonomy5/7200">SEISMOLOGY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/7270">Tomography</topic><topic authorityURI="http://psi.agu.org/taxonomy5/7208">Mantle</topic><topic authorityURI="http://psi.agu.org/taxonomy5/7203">Body waves</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8100">TECTONOPHYSICS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8180">Tomography</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8124">Earth's interior: composition and state</topic></subject><identifier type="ISSN">1525-2027</identifier><identifier type="eISSN">1525-2027</identifier><identifier type="DOI">10.1002/(ISSN)1525-2027</identifier><identifier type="CODEN">GGGGFR</identifier><identifier type="PublisherID">GGGE</identifier><part><date>2011</date><detail type="title"><title>Geochemistry, Geophysics, Geosystems</title></detail><detail type="volume"><caption>vol.</caption><number>12</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>n/a</start><end>n/a</end><total>27</total></extent></part></relatedItem><identifier type="istex">853A844AE56D4803E672B9550513C8161044F602</identifier><identifier type="DOI">10.1029/2010GC003421</identifier><identifier type="ArticleID">2010GC003421</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright 2011 by the American Geophysical Union.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><enrichments><json:item><type>multicat</type><uri>https://api.istex.fr/document/853A844AE56D4803E672B9550513C8161044F602/enrichments/multicat</uri></json:item></enrichments><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Ticri/CIDE/explor/CyberinfraV1/Data/Istex/Corpus
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000701 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Corpus/biblio.hfd -nk 000701 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Ticri/CIDE
|area= CyberinfraV1
|flux= Istex
|étape= Corpus
|type= RBID
|clé= ISTEX:853A844AE56D4803E672B9550513C8161044F602
|texte= Mantle provinces under North America from multifrequency P wave tomography
}}
| This area was generated with Dilib version V0.6.25. |  |