Teleseismic p-wave traveltime residuals and deep structure of the Aegean region
Identifieur interne : 000474 ( Istex/Corpus ); précédent : 000473; suivant : 000475Teleseismic p-wave traveltime residuals and deep structure of the Aegean region
Auteurs : N. K. Agarwal ; W. R. Jacoby ; H. BerckhemerSource :
- Tectonophysics [ 0040-1951 ] ; 1976.
English descriptors
- KwdEn :
- Absolute residuals, Absolute traveltime residuals, Additional constraints, Aegean region, Anomaly, Azimuth, Azimuthal, Azimuthal variation, Benioff zone, Compressional waves, Constant term, Constant terms, Crete, Crust, Crustal, Crustal velocities, Deep events, Deep structure, Earth planet, Eastern mediterranean, Epicentral distance, Epicentral distance range, Focal depth, Focal parameters, Further analysis, Geophys, Geophysical, Gravity anomalies, Greek stations, Heat flow, Hellenic trench, Large scatter, Lateral, Lateral inhomogeneities, Lateral variation, Magnetic anomalies, Maximum velocity, Mckenzie, Mediterranean region, Mediterranean ridge, National observatory, Original records, Other geophysical, Overlying material, Papazachos, Personal communication, Pindus range, Plate tectonics, Pure appl, Relative motions, Relative residuals, Relative traveltime residuals, Residual, Scatter, Seismic, Seismic zone, Seismicity, Seismological institute, Simple arithmetic, Space phys, Sprengnether, Standard deviations, Standard model, Tectonics, Teleseismic traveltime residuals, Thickness variations, Tonga island, Travel time anomaly, Travel times, Traveltime, Traveltime residuals, Uneven data distribution, Upper limit, Upper mantle, Uppermost mantle, Velocity anomalies, Wave residuals.
- Teeft :
- Absolute residuals, Absolute traveltime residuals, Additional constraints, Aegean region, Anomaly, Azimuth, Azimuthal, Azimuthal variation, Benioff zone, Compressional waves, Constant term, Constant terms, Crete, Crust, Crustal, Crustal velocities, Deep events, Deep structure, Earth planet, Eastern mediterranean, Epicentral distance, Epicentral distance range, Focal depth, Focal parameters, Further analysis, Geophys, Geophysical, Gravity anomalies, Greek stations, Heat flow, Hellenic trench, Large scatter, Lateral, Lateral inhomogeneities, Lateral variation, Magnetic anomalies, Maximum velocity, Mckenzie, Mediterranean region, Mediterranean ridge, National observatory, Original records, Other geophysical, Overlying material, Papazachos, Personal communication, Pindus range, Plate tectonics, Pure appl, Relative motions, Relative residuals, Relative traveltime residuals, Residual, Scatter, Seismic, Seismic zone, Seismicity, Seismological institute, Simple arithmetic, Space phys, Sprengnether, Standard deviations, Standard model, Tectonics, Teleseismic traveltime residuals, Thickness variations, Tonga island, Travel time anomaly, Travel times, Traveltime, Traveltime residuals, Uneven data distribution, Upper limit, Upper mantle, Uppermost mantle, Velocity anomalies, Wave residuals.
Abstract
Abstract: Teleseismic P-wave traveltime residuals have been measured at the Greek seismic stations with respect to the Herrin 68 tables. In spite of the large scatter, some insight into crustal and upper-mantle structure of the Aegean region can be gained. The average absolute residuals (observed minus Herrin traveltimes) are of the order of + 2 s. The most plausible interpretation is an efficient low-velocity zone in the upper mantle. Simple estimates of densities and subsequently gravity with the aid of Birch's law suggest that the Aegean region is underlain by hot expanded upper mantle, perhaps involving partial melting. The relative P residuals (observed minus Herrin traveltime differences between a station and Athens) are generally positive and can be interpreted with lateral variations of the LVZ or of the crust. The latter interpretation is supported in some cases by seismic refraction data. The azimuthal variation of the relative residuals at stations on the non-volcanic arc bears a distinct relation with the arc orientation. At Archangelos (Rhodes) where we “see” through the Benioff zone, the residuals from N to W are between -1 and -2 s and indicate a high-velocity slab sinking below the Aegean sea. At Vamos (Crete), Valsamata (Kephallenia), and Joanina (Pindus Range) the largest (smallest) residuals are along directions parallel (perpendicular) to the arc. This can be interpreted by crustal thickening under the sedimentary arc and/or by velocity anisotropy with the maximum perpendicular to the arc. On the whole, our study supports the hypothesis that the Aegean region is a trench—island-arc—marginal-sea system.
Url:
DOI: 10.1016/0040-1951(76)90166-9
Links to Exploration step
ISTEX:E846AEA6DC6B1C3BB0753670612C7CD2C7EE5F4DLe document en format XML
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At Archangelos (Rhodes) where we “see” through the Benioff zone, the residuals from N to W are between -1 and -2 s and indicate a high-velocity slab sinking below the Aegean sea. At Vamos (Crete), Valsamata (Kephallenia), and Joanina (Pindus Range) the largest (smallest) residuals are along directions parallel (perpendicular) to the arc. This can be interpreted by crustal thickening under the sedimentary arc and/or by velocity anisotropy with the maximum perpendicular to the arc. 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Agarwal</name><affiliations><json:string>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</json:string></affiliations></json:item><json:item><name>W.R. Jacoby</name><affiliations><json:string>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</json:string></affiliations></json:item><json:item><name>H. Berckhemer</name><affiliations><json:string>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</json:string></affiliations></json:item></author><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>Teleseismic P-wave traveltime residuals have been measured at the Greek seismic stations with respect to the Herrin 68 tables. In spite of the large scatter, some insight into crustal and upper-mantle structure of the Aegean region can be gained. The average absolute residuals (observed minus Herrin traveltimes) are of the order of + 2 s. The most plausible interpretation is an efficient low-velocity zone in the upper mantle. Simple estimates of densities and subsequently gravity with the aid of Birch's law suggest that the Aegean region is underlain by hot expanded upper mantle, perhaps involving partial melting. The relative P residuals (observed minus Herrin traveltime differences between a station and Athens) are generally positive and can be interpreted with lateral variations of the LVZ or of the crust. The latter interpretation is supported in some cases by seismic refraction data. The azimuthal variation of the relative residuals at stations on the non-volcanic arc bears a distinct relation with the arc orientation. At Archangelos (Rhodes) where we “see” through the Benioff zone, the residuals from N to W are between -1 and -2 s and indicate a high-velocity slab sinking below the Aegean sea. At Vamos (Crete), Valsamata (Kephallenia), and Joanina (Pindus Range) the largest (smallest) residuals are along directions parallel (perpendicular) to the arc. This can be interpreted by crustal thickening under the sedimentary arc and/or by velocity anisotropy with the maximum perpendicular to the arc. On the whole, our study supports the hypothesis that the Aegean region is a trench—island-arc—marginal-sea system.</abstract><qualityIndicators><score>8.5</score><pdfVersion>1.4</pdfVersion><pdfPageSize>468 x 684 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>0</keywordCount><abstractCharCount>1639</abstractCharCount><pdfWordCount>6030</pdfWordCount><pdfCharCount>36127</pdfCharCount><pdfPageCount>25</pdfPageCount><abstractWordCount>252</abstractWordCount></qualityIndicators><title>Teleseismic p-wave traveltime residuals and deep structure of the Aegean region</title><pii><json:string>0040-1951(76)90166-9</json:string></pii><genre><json:string>research-article</json:string></genre><serie><title>(in Greek with English abstract)</title><language><json:string>unknown</json:string></language></serie><host><title>Tectonophysics</title><language><json:string>unknown</json:string></language><publicationDate>1976</publicationDate><issn><json:string>0040-1951</json:string></issn><pii><json:string>S0040-1951(00)X0458-1</json:string></pii><volume>31</volume><issue>1–2</issue><pages><first>33</first><last>57</last></pages><genre><json:string>journal</json:string></genre></host><categories><wos><json:string>science</json:string><json:string>geochemistry & geophysics</json:string></wos><scienceMetrix><json:string>natural sciences</json:string><json:string>earth & environmental sciences</json:string><json:string>geochemistry & geophysics</json:string></scienceMetrix><inist><json:string>sciences appliquees, technologies et medecines</json:string><json:string>sciences exactes et technologie</json:string><json:string>terre, ocean, espace</json:string><json:string>sciences de la terre</json:string></inist></categories><publicationDate>1976</publicationDate><copyrightDate>1976</copyrightDate><doi><json:string>10.1016/0040-1951(76)90166-9</json:string></doi><id>E846AEA6DC6B1C3BB0753670612C7CD2C7EE5F4D</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/E846AEA6DC6B1C3BB0753670612C7CD2C7EE5F4D/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/E846AEA6DC6B1C3BB0753670612C7CD2C7EE5F4D/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/E846AEA6DC6B1C3BB0753670612C7CD2C7EE5F4D/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a">Teleseismic p-wave traveltime residuals and deep structure of the Aegean region</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>ELSEVIER</p></availability><date>1976</date></publicationStmt><notesStmt><note type="content">Section title: Research paper</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a">Teleseismic p-wave traveltime residuals and deep structure of the Aegean region</title><author xml:id="author-0000"><persName><forename type="first">N.K.</forename><surname>Agarwal</surname></persName><note type="biography">Now at: Oil and Natural Gas Commission, 41 Chowringhee Road, Calcutta, India.</note><affiliation>Now at: Oil and Natural Gas Commission, 41 Chowringhee Road, Calcutta, India.</affiliation><affiliation>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</affiliation></author><author xml:id="author-0001"><persName><forename type="first">W.R.</forename><surname>Jacoby</surname></persName><affiliation>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</affiliation></author><author xml:id="author-0002"><persName><forename type="first">H.</forename><surname>Berckhemer</surname></persName><affiliation>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</affiliation></author><idno type="istex">E846AEA6DC6B1C3BB0753670612C7CD2C7EE5F4D</idno><idno type="DOI">10.1016/0040-1951(76)90166-9</idno><idno type="PII">0040-1951(76)90166-9</idno></analytic><monogr><title level="j">Tectonophysics</title><title level="j" type="abbrev">TECTO</title><idno type="pISSN">0040-1951</idno><idno type="PII">S0040-1951(00)X0458-1</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1976"></date><biblScope unit="volume">31</biblScope><biblScope unit="issue">1–2</biblScope><biblScope unit="page" from="33">33</biblScope><biblScope unit="page" to="57">57</biblScope></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1976</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Teleseismic P-wave traveltime residuals have been measured at the Greek seismic stations with respect to the Herrin 68 tables. In spite of the large scatter, some insight into crustal and upper-mantle structure of the Aegean region can be gained. The average absolute residuals (observed minus Herrin traveltimes) are of the order of + 2 s. The most plausible interpretation is an efficient low-velocity zone in the upper mantle. Simple estimates of densities and subsequently gravity with the aid of Birch's law suggest that the Aegean region is underlain by hot expanded upper mantle, perhaps involving partial melting. The relative P residuals (observed minus Herrin traveltime differences between a station and Athens) are generally positive and can be interpreted with lateral variations of the LVZ or of the crust. The latter interpretation is supported in some cases by seismic refraction data. The azimuthal variation of the relative residuals at stations on the non-volcanic arc bears a distinct relation with the arc orientation. At Archangelos (Rhodes) where we “see” through the Benioff zone, the residuals from N to W are between -1 and -2 s and indicate a high-velocity slab sinking below the Aegean sea. At Vamos (Crete), Valsamata (Kephallenia), and Joanina (Pindus Range) the largest (smallest) residuals are along directions parallel (perpendicular) to the arc. This can be interpreted by crustal thickening under the sedimentary arc and/or by velocity anisotropy with the maximum perpendicular to the arc. On the whole, our study supports the hypothesis that the Aegean region is a trench—island-arc—marginal-sea system.</p></abstract></profileDesc><revisionDesc><change when="1976">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/E846AEA6DC6B1C3BB0753670612C7CD2C7EE5F4D/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla"><item-info><jid>TECTO</jid><aid>76901669</aid><ce:pii>0040-1951(76)90166-9</ce:pii><ce:doi>10.1016/0040-1951(76)90166-9</ce:doi><ce:copyright type="unknown" year="1976"></ce:copyright></item-info><head><ce:dochead><ce:textfn>Research paper</ce:textfn></ce:dochead><ce:title>Teleseismic p-wave traveltime residuals and deep structure of the Aegean region</ce:title><ce:author-group><ce:author><ce:given-name>N.K.</ce:given-name><ce:surname>Agarwal</ce:surname><ce:cross-ref refid="FN1"><ce:sup>1</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>W.R.</ce:given-name><ce:surname>Jacoby</ce:surname></ce:author><ce:author><ce:given-name>H.</ce:given-name><ce:surname>Berckhemer</ce:surname></ce:author><ce:affiliation><ce:textfn>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</ce:textfn></ce:affiliation><ce:footnote id="FN1"><ce:label>1</ce:label><ce:note-para>Now at: Oil and Natural Gas Commission, 41 Chowringhee Road, Calcutta, India.</ce:note-para></ce:footnote></ce:author-group><ce:date-received day="12" month="8" year="1975"></ce:date-received><ce:date-accepted day="3" month="11" year="1975"></ce:date-accepted><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>Teleseismic P-wave traveltime residuals have been measured at the Greek seismic stations with respect to the Herrin 68 tables. In spite of the large scatter, some insight into crustal and upper-mantle structure of the Aegean region can be gained. The average absolute residuals (observed minus Herrin traveltimes) are of the order of + 2 s. The most plausible interpretation is an efficient low-velocity zone in the upper mantle. Simple estimates of densities and subsequently gravity with the aid of Birch's law suggest that the Aegean region is underlain by hot expanded upper mantle, perhaps involving partial melting. The relative P residuals (observed minus Herrin traveltime differences between a station and Athens) are generally positive and can be interpreted with lateral variations of the LVZ or of the crust. The latter interpretation is supported in some cases by seismic refraction data. The azimuthal variation of the relative residuals at stations on the non-volcanic arc bears a distinct relation with the arc orientation. At Archangelos (Rhodes) where we “see” through the Benioff zone, the residuals from N to W are between -1 and -2 s and indicate a high-velocity slab sinking below the Aegean sea. At Vamos (Crete), Valsamata (Kephallenia), and Joanina (Pindus Range) the largest (smallest) residuals are along directions parallel (perpendicular) to the arc. This can be interpreted by crustal thickening under the sedimentary arc and/or by velocity anisotropy with the maximum perpendicular to the arc. On the whole, our study supports the hypothesis that the Aegean region is a trench—island-arc—marginal-sea system.</ce:simple-para></ce:abstract-sec></ce:abstract></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo><title>Teleseismic p-wave traveltime residuals and deep structure of the Aegean region</title></titleInfo><titleInfo type="alternative" contentType="CDATA"><title>Teleseismic p-wave traveltime residuals and deep structure of the Aegean region</title></titleInfo><name type="personal"><namePart type="given">N.K.</namePart><namePart type="family">Agarwal</namePart><affiliation>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</affiliation><description>Now at: Oil and Natural Gas Commission, 41 Chowringhee Road, Calcutta, India.</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">W.R.</namePart><namePart type="family">Jacoby</namePart><affiliation>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H.</namePart><namePart type="family">Berckhemer</namePart><affiliation>Institute of Meteorology and Geophysics, University of Frankfurt, Frankfurt a. M. Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-1JC4F85T-7">research-article</genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1976</dateIssued><copyrightDate encoding="w3cdtf">1976</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><abstract lang="en">Abstract: Teleseismic P-wave traveltime residuals have been measured at the Greek seismic stations with respect to the Herrin 68 tables. In spite of the large scatter, some insight into crustal and upper-mantle structure of the Aegean region can be gained. The average absolute residuals (observed minus Herrin traveltimes) are of the order of + 2 s. The most plausible interpretation is an efficient low-velocity zone in the upper mantle. Simple estimates of densities and subsequently gravity with the aid of Birch's law suggest that the Aegean region is underlain by hot expanded upper mantle, perhaps involving partial melting. The relative P residuals (observed minus Herrin traveltime differences between a station and Athens) are generally positive and can be interpreted with lateral variations of the LVZ or of the crust. The latter interpretation is supported in some cases by seismic refraction data. The azimuthal variation of the relative residuals at stations on the non-volcanic arc bears a distinct relation with the arc orientation. At Archangelos (Rhodes) where we “see” through the Benioff zone, the residuals from N to W are between -1 and -2 s and indicate a high-velocity slab sinking below the Aegean sea. At Vamos (Crete), Valsamata (Kephallenia), and Joanina (Pindus Range) the largest (smallest) residuals are along directions parallel (perpendicular) to the arc. This can be interpreted by crustal thickening under the sedimentary arc and/or by velocity anisotropy with the maximum perpendicular to the arc. On the whole, our study supports the hypothesis that the Aegean region is a trench—island-arc—marginal-sea system.</abstract><note type="content">Section title: Research paper</note><relatedItem type="host"><titleInfo><title>Tectonophysics</title></titleInfo><titleInfo type="abbreviated"><title>TECTO</title></titleInfo><genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">197603</dateIssued></originInfo><identifier type="ISSN">0040-1951</identifier><identifier type="PII">S0040-1951(00)X0458-1</identifier><part><date>197603</date><detail type="volume"><number>31</number><caption>vol.</caption></detail><detail type="issue"><number>1–2</number><caption>no.</caption></detail><extent unit="issue-pages"><start>T1</start><end>T53</end></extent><extent unit="issue-pages"><start>1</start><end>137</end></extent><extent unit="pages"><start>33</start><end>57</end></extent></part></relatedItem><identifier type="istex">E846AEA6DC6B1C3BB0753670612C7CD2C7EE5F4D</identifier><identifier type="ark">ark:/67375/6H6-F00LXJQL-B</identifier><identifier type="DOI">10.1016/0040-1951(76)90166-9</identifier><identifier type="PII">0040-1951(76)90166-9</identifier><recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-HKKZVM7B-M">elsevier</recordContentSource></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/E846AEA6DC6B1C3BB0753670612C7CD2C7EE5F4D/metadata/json</uri></json:item></metadata></istex></record>Pour manipuler ce document sous Unix (Dilib)
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