Crustal structure and seismicity of the Havre Trough at 26°S
Identifieur interne : 000379 ( PascalFrancis/Corpus ); précédent : 000378; suivant : 000380Crustal structure and seismicity of the Havre Trough at 26°S
Auteurs : A. Nishizawa ; N. Takahashi ; S. AbeSource :
- Geophysical research letters [ 0094-8276 ] ; 1999.
Descripteurs français
- Pascal (Inist)
- Sismicité, Sismographe fond sous marin, Tectonique, Bassin arrière arc, Océan Pacifique Sud Ouest, Hypocentre, Séisme, Bathymétrie, Bassin Lau, Fosse Kermadec, Onde sismique, Onde P, Levé sismique, Sismique réfraction, Tectonique extension, Volcanisme sous marin, Rifting, Expansion fond océanique, Epicentre, Carte bathymétrique, Fosse Havre.
English descriptors
- KwdEn :
- Kermadec Trench, Lau Basin, P-waves, Southwest Pacific, back-arc basins, bathymetric maps, bathymetry, earthquakes, epicenters, extension tectonics, hypocenter, ocean bottom seismographs, rifting, sea-floor spreading, seismic refraction, seismic surveys, seismic waves, seismicity, submarine volcanism, tectonics.
Abstract
An ocean bottom seismographic (OBS) experiment was carried out to investigate the present-day tectonics at the northern end of the Havre Trough, a backarc basin in the southwestern Pacific. Hypocenter distribution shows no seismicity within 50 km of the OBS array but two active regions outside the Trough; one is to the northeast of the array at a bathymetric high between the Lau Basin and Havre Trough; the other is to the southeast of the array beneath the landward slope of the Kermadec Trench. P wavespeed structure obtained from the refraction survey is characterized by a thinned island arc crust with a thickness of 9-10 km. Many volcanic intrusions shown in reflection profiles that support extension tectonics are covered by undisturbed sediments. These suggest little present activity related to rifting and/or spreading.
Notice en format standard (ISO 2709)
Pour connaître la documentation sur le format Inist Standard.
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Format Inist (serveur)
| NO : | PASCAL 99-0447432 INIST |
|---|---|
| ET : | Crustal structure and seismicity of the Havre Trough at 26°S |
| AU : | NISHIZAWA (A.); TAKAHASHI (N.); ABE (S.) |
| AF : | Hydrographic Department, Maritime Safety Agency/Tokyo/Japon (1 aut.); Japan Marine Science and Technology Center/Yokosuka/Japon (2 aut.); Central Research Institute of Electric Power Industry/Abiko/Japon (3 aut.) |
| DT : | Publication en série; Niveau analytique |
| SO : | Geophysical research letters; ISSN 0094-8276; Coden GPRLAJ; Etats-Unis; Da. 1999; Vol. 26; No. 16; Pp. 2549-2552; Bibl. 21 ref. |
| LA : | Anglais |
| EA : | An ocean bottom seismographic (OBS) experiment was carried out to investigate the present-day tectonics at the northern end of the Havre Trough, a backarc basin in the southwestern Pacific. Hypocenter distribution shows no seismicity within 50 km of the OBS array but two active regions outside the Trough; one is to the northeast of the array at a bathymetric high between the Lau Basin and Havre Trough; the other is to the southeast of the array beneath the landward slope of the Kermadec Trench. P wavespeed structure obtained from the refraction survey is characterized by a thinned island arc crust with a thickness of 9-10 km. Many volcanic intrusions shown in reflection profiles that support extension tectonics are covered by undisturbed sediments. These suggest little present activity related to rifting and/or spreading. |
| CC : | 225B03; 225A; 001E01M03; 001E01L |
| FD : | Sismicité; Sismographe fond sous marin; Tectonique; Bassin arrière arc; Océan Pacifique Sud Ouest; Hypocentre; Séisme; Bathymétrie; Bassin Lau; Fosse Kermadec; Onde sismique; Onde P; Levé sismique; Sismique réfraction; Tectonique extension; Volcanisme sous marin; Rifting; Expansion fond océanique; Epicentre; Carte bathymétrique; Fosse Havre |
| FG : | Océan Pacifique; Océan Pacifique Sud |
| ED : | seismicity; ocean bottom seismographs; tectonics; back-arc basins; Southwest Pacific; hypocenter; earthquakes; bathymetry; Lau Basin; Kermadec Trench; seismic waves; P-waves; seismic surveys; seismic refraction; extension tectonics; submarine volcanism; rifting; sea-floor spreading; epicenters; bathymetric maps |
| EG : | Pacific Ocean; South Pacific |
| SD : | Sismicidad; Sismógrafo fondo submarino; Tectónico; Cuenca marginal interna; Hipocentro; Sismo; Batimetría; Cuenca Lau; Onda sísmica; Onda P; Levantamiento sísmico; Método refracción sísmica; Volcanismo submarino; Expansión fondo oceánico; Epicentro; Mapa batimétrico |
| LO : | INIST-16687.354000089296070360 |
| ID : | 99-0447432 |
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Pascal:99-0447432Le document en format XML
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Abe</name><affiliation><inist:fA14 i1="03"><s1>Central Research Institute of Electric Power Industry</s1><s2>Abiko</s2><s3>JPN</s3><sZ>3 aut.</sZ></inist:fA14></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">99-0447432</idno><date when="1999">1999</date><idno type="stanalyst">PASCAL 99-0447432 INIST</idno><idno type="RBID">Pascal:99-0447432</idno><idno type="wicri:Area/PascalFrancis/Corpus">000379</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Crustal structure and seismicity of the Havre Trough at 26°S</title><author><name sortKey="Nishizawa, A" sort="Nishizawa, A" uniqKey="Nishizawa A" first="A." last="Nishizawa">A. Nishizawa</name><affiliation><inist:fA14 i1="01"><s1>Hydrographic Department, Maritime Safety Agency</s1><s2>Tokyo</s2><s3>JPN</s3><sZ>1 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Takahashi, N" sort="Takahashi, N" uniqKey="Takahashi N" first="N." last="Takahashi">N. Takahashi</name><affiliation><inist:fA14 i1="02"><s1>Japan Marine Science and Technology Center</s1><s2>Yokosuka</s2><s3>JPN</s3><sZ>2 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Abe, S" sort="Abe, S" uniqKey="Abe S" first="S." last="Abe">S. Abe</name><affiliation><inist:fA14 i1="03"><s1>Central Research Institute of Electric Power Industry</s1><s2>Abiko</s2><s3>JPN</s3><sZ>3 aut.</sZ></inist:fA14></affiliation></author></analytic><series><title level="j" type="main">Geophysical research letters</title><title level="j" type="abbreviated">Geophys. res. lett.</title><idno type="ISSN">0094-8276</idno><imprint><date when="1999">1999</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Geophysical research letters</title><title level="j" type="abbreviated">Geophys. res. lett.</title><idno type="ISSN">0094-8276</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Kermadec Trench</term><term>Lau Basin</term><term>P-waves</term><term>Southwest Pacific</term><term>back-arc basins</term><term>bathymetric maps</term><term>bathymetry</term><term>earthquakes</term><term>epicenters</term><term>extension tectonics</term><term>hypocenter</term><term>ocean bottom seismographs</term><term>rifting</term><term>sea-floor spreading</term><term>seismic refraction</term><term>seismic surveys</term><term>seismic waves</term><term>seismicity</term><term>submarine volcanism</term><term>tectonics</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Sismicité</term><term>Sismographe fond sous marin</term><term>Tectonique</term><term>Bassin arrière arc</term><term>Océan Pacifique Sud Ouest</term><term>Hypocentre</term><term>Séisme</term><term>Bathymétrie</term><term>Bassin Lau</term><term>Fosse Kermadec</term><term>Onde sismique</term><term>Onde P</term><term>Levé sismique</term><term>Sismique réfraction</term><term>Tectonique extension</term><term>Volcanisme sous marin</term><term>Rifting</term><term>Expansion fond océanique</term><term>Epicentre</term><term>Carte bathymétrique</term><term>Fosse Havre</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">An ocean bottom seismographic (OBS) experiment was carried out to investigate the present-day tectonics at the northern end of the Havre Trough, a backarc basin in the southwestern Pacific. Hypocenter distribution shows no seismicity within 50 km of the OBS array but two active regions outside the Trough; one is to the northeast of the array at a bathymetric high between the Lau Basin and Havre Trough; the other is to the southeast of the array beneath the landward slope of the Kermadec Trench. P wavespeed structure obtained from the refraction survey is characterized by a thinned island arc crust with a thickness of 9-10 km. Many volcanic intrusions shown in reflection profiles that support extension tectonics are covered by undisturbed sediments. These suggest little present activity related to rifting and/or spreading.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0094-8276</s0></fA01><fA02 i1="01"><s0>GPRLAJ</s0></fA02><fA03 i2="1"><s0>Geophys. res. lett.</s0></fA03><fA05><s2>26</s2></fA05><fA06><s2>16</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Crustal structure and seismicity of the Havre Trough at 26°S</s1></fA08><fA11 i1="01" i2="1"><s1>NISHIZAWA (A.)</s1></fA11><fA11 i1="02" i2="1"><s1>TAKAHASHI (N.)</s1></fA11><fA11 i1="03" i2="1"><s1>ABE (S.)</s1></fA11><fA14 i1="01"><s1>Hydrographic Department, Maritime Safety Agency</s1><s2>Tokyo</s2><s3>JPN</s3><sZ>1 aut.</sZ></fA14><fA14 i1="02"><s1>Japan Marine Science and Technology Center</s1><s2>Yokosuka</s2><s3>JPN</s3><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>Central Research Institute of Electric Power Industry</s1><s2>Abiko</s2><s3>JPN</s3><sZ>3 aut.</sZ></fA14><fA20><s1>2549-2552</s1></fA20><fA21><s1>1999</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>16687</s2><s5>354000089296070360</s5></fA43><fA44><s0>0000</s0><s1>© 1999 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>21 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>99-0447432</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Geophysical research letters</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>An ocean bottom seismographic (OBS) experiment was carried out to investigate the present-day tectonics at the northern end of the Havre Trough, a backarc basin in the southwestern Pacific. Hypocenter distribution shows no seismicity within 50 km of the OBS array but two active regions outside the Trough; one is to the northeast of the array at a bathymetric high between the Lau Basin and Havre Trough; the other is to the southeast of the array beneath the landward slope of the Kermadec Trench. P wavespeed structure obtained from the refraction survey is characterized by a thinned island arc crust with a thickness of 9-10 km. Many volcanic intrusions shown in reflection profiles that support extension tectonics are covered by undisturbed sediments. These suggest little present activity related to rifting and/or spreading.</s0></fC01><fC02 i1="01" i2="2"><s0>225B03</s0></fC02><fC02 i1="02" i2="2"><s0>225A</s0></fC02><fC02 i1="03" i2="X"><s0>001E01M03</s0></fC02><fC02 i1="04" i2="X"><s0>001E01L</s0></fC02><fC03 i1="01" i2="2" l="FRE"><s0>Sismicité</s0><s5>01</s5></fC03><fC03 i1="01" i2="2" l="ENG"><s0>seismicity</s0><s5>01</s5></fC03><fC03 i1="01" i2="2" l="SPA"><s0>Sismicidad</s0><s5>01</s5></fC03><fC03 i1="02" i2="2" l="FRE"><s0>Sismographe fond sous marin</s0><s5>02</s5></fC03><fC03 i1="02" i2="2" l="ENG"><s0>ocean bottom seismographs</s0><s5>02</s5></fC03><fC03 i1="02" i2="2" l="SPA"><s0>Sismógrafo fondo submarino</s0><s5>02</s5></fC03><fC03 i1="03" i2="2" l="FRE"><s0>Tectonique</s0><s5>04</s5></fC03><fC03 i1="03" i2="2" l="ENG"><s0>tectonics</s0><s5>04</s5></fC03><fC03 i1="03" i2="2" l="SPA"><s0>Tectónico</s0><s5>04</s5></fC03><fC03 i1="04" i2="2" l="FRE"><s0>Bassin arrière arc</s0><s5>05</s5></fC03><fC03 i1="04" i2="2" l="ENG"><s0>back-arc basins</s0><s5>05</s5></fC03><fC03 i1="04" i2="2" l="SPA"><s0>Cuenca marginal interna</s0><s5>05</s5></fC03><fC03 i1="05" i2="2" l="FRE"><s0>Océan Pacifique Sud Ouest</s0><s2>NG</s2><s5>06</s5></fC03><fC03 i1="05" i2="2" l="ENG"><s0>Southwest Pacific</s0><s2>NG</s2><s5>06</s5></fC03><fC03 i1="06" i2="2" l="FRE"><s0>Hypocentre</s0><s5>07</s5></fC03><fC03 i1="06" i2="2" l="ENG"><s0>hypocenter</s0><s5>07</s5></fC03><fC03 i1="06" i2="2" l="SPA"><s0>Hipocentro</s0><s5>07</s5></fC03><fC03 i1="07" i2="2" l="FRE"><s0>Séisme</s0><s5>08</s5></fC03><fC03 i1="07" i2="2" l="ENG"><s0>earthquakes</s0><s5>08</s5></fC03><fC03 i1="07" i2="2" l="SPA"><s0>Sismo</s0><s5>08</s5></fC03><fC03 i1="08" i2="2" l="FRE"><s0>Bathymétrie</s0><s5>09</s5></fC03><fC03 i1="08" i2="2" l="ENG"><s0>bathymetry</s0><s5>09</s5></fC03><fC03 i1="08" i2="2" l="SPA"><s0>Batimetría</s0><s5>09</s5></fC03><fC03 i1="09" i2="2" l="FRE"><s0>Bassin Lau</s0><s2>NG</s2><s5>10</s5></fC03><fC03 i1="09" i2="2" l="ENG"><s0>Lau Basin</s0><s2>NG</s2><s5>10</s5></fC03><fC03 i1="09" i2="2" l="SPA"><s0>Cuenca Lau</s0><s2>NG</s2><s5>10</s5></fC03><fC03 i1="10" i2="2" l="FRE"><s0>Fosse Kermadec</s0><s2>NG</s2><s5>11</s5></fC03><fC03 i1="10" i2="2" l="ENG"><s0>Kermadec Trench</s0><s2>NG</s2><s5>11</s5></fC03><fC03 i1="11" i2="2" l="FRE"><s0>Onde sismique</s0><s5>12</s5></fC03><fC03 i1="11" i2="2" l="ENG"><s0>seismic waves</s0><s5>12</s5></fC03><fC03 i1="11" i2="2" l="SPA"><s0>Onda sísmica</s0><s5>12</s5></fC03><fC03 i1="12" i2="2" l="FRE"><s0>Onde P</s0><s5>13</s5></fC03><fC03 i1="12" i2="2" l="ENG"><s0>P-waves</s0><s5>13</s5></fC03><fC03 i1="12" i2="2" l="SPA"><s0>Onda P</s0><s5>13</s5></fC03><fC03 i1="13" i2="2" l="FRE"><s0>Levé sismique</s0><s5>14</s5></fC03><fC03 i1="13" i2="2" l="ENG"><s0>seismic surveys</s0><s5>14</s5></fC03><fC03 i1="13" i2="2" l="SPA"><s0>Levantamiento sísmico</s0><s5>14</s5></fC03><fC03 i1="14" i2="2" l="FRE"><s0>Sismique réfraction</s0><s5>15</s5></fC03><fC03 i1="14" i2="2" l="ENG"><s0>seismic refraction</s0><s5>15</s5></fC03><fC03 i1="14" i2="2" l="SPA"><s0>Método refracción sísmica</s0><s5>15</s5></fC03><fC03 i1="15" i2="2" l="FRE"><s0>Tectonique extension</s0><s5>17</s5></fC03><fC03 i1="15" i2="2" l="ENG"><s0>extension tectonics</s0><s5>17</s5></fC03><fC03 i1="16" i2="2" l="FRE"><s0>Volcanisme sous marin</s0><s5>18</s5></fC03><fC03 i1="16" i2="2" l="ENG"><s0>submarine volcanism</s0><s5>18</s5></fC03><fC03 i1="16" i2="2" l="SPA"><s0>Volcanismo submarino</s0><s5>18</s5></fC03><fC03 i1="17" i2="2" l="FRE"><s0>Rifting</s0><s5>19</s5></fC03><fC03 i1="17" i2="2" l="ENG"><s0>rifting</s0><s5>19</s5></fC03><fC03 i1="18" i2="2" l="FRE"><s0>Expansion fond océanique</s0><s5>20</s5></fC03><fC03 i1="18" i2="2" l="ENG"><s0>sea-floor spreading</s0><s5>20</s5></fC03><fC03 i1="18" i2="2" l="SPA"><s0>Expansión fondo oceánico</s0><s5>20</s5></fC03><fC03 i1="19" i2="2" l="FRE"><s0>Epicentre</s0><s5>21</s5></fC03><fC03 i1="19" i2="2" l="ENG"><s0>epicenters</s0><s5>21</s5></fC03><fC03 i1="19" i2="2" l="SPA"><s0>Epicentro</s0><s5>21</s5></fC03><fC03 i1="20" i2="2" l="FRE"><s0>Carte bathymétrique</s0><s5>22</s5></fC03><fC03 i1="20" i2="2" l="ENG"><s0>bathymetric maps</s0><s5>22</s5></fC03><fC03 i1="20" i2="2" l="SPA"><s0>Mapa batimétrico</s0><s5>22</s5></fC03><fC03 i1="21" i2="2" l="FRE"><s0>Fosse Havre</s0><s4>INC</s4><s5>52</s5></fC03><fC06><s0>ILS</s0></fC06><fC07 i1="01" i2="2" l="FRE"><s0>Océan Pacifique</s0></fC07><fC07 i1="01" i2="2" l="ENG"><s0>Pacific Ocean</s0></fC07><fC07 i1="01" i2="2" l="SPA"><s0>Océano Pacífico</s0></fC07><fC07 i1="02" i2="2" l="FRE"><s0>Océan Pacifique Sud</s0><s2>NG</s2></fC07><fC07 i1="02" i2="2" l="ENG"><s0>South Pacific</s0><s2>NG</s2></fC07><fN21><s1>284</s1></fN21></pA></standard><server><NO>PASCAL 99-0447432 INIST</NO><ET>Crustal structure and seismicity of the Havre Trough at 26°S</ET><AU>NISHIZAWA (A.); TAKAHASHI (N.); ABE (S.)</AU><AF>Hydrographic Department, Maritime Safety Agency/Tokyo/Japon (1 aut.); Japan Marine Science and Technology Center/Yokosuka/Japon (2 aut.); Central Research Institute of Electric Power Industry/Abiko/Japon (3 aut.)</AF><DT>Publication en série; Niveau analytique</DT><SO>Geophysical research letters; ISSN 0094-8276; Coden GPRLAJ; Etats-Unis; Da. 1999; Vol. 26; No. 16; Pp. 2549-2552; Bibl. 21 ref.</SO><LA>Anglais</LA><EA>An ocean bottom seismographic (OBS) experiment was carried out to investigate the present-day tectonics at the northern end of the Havre Trough, a backarc basin in the southwestern Pacific. Hypocenter distribution shows no seismicity within 50 km of the OBS array but two active regions outside the Trough; one is to the northeast of the array at a bathymetric high between the Lau Basin and Havre Trough; the other is to the southeast of the array beneath the landward slope of the Kermadec Trench. P wavespeed structure obtained from the refraction survey is characterized by a thinned island arc crust with a thickness of 9-10 km. Many volcanic intrusions shown in reflection profiles that support extension tectonics are covered by undisturbed sediments. These suggest little present activity related to rifting and/or spreading.</EA><CC>225B03; 225A; 001E01M03; 001E01L</CC><FD>Sismicité; Sismographe fond sous marin; Tectonique; Bassin arrière arc; Océan Pacifique Sud Ouest; Hypocentre; Séisme; Bathymétrie; Bassin Lau; Fosse Kermadec; Onde sismique; Onde P; Levé sismique; Sismique réfraction; Tectonique extension; Volcanisme sous marin; Rifting; Expansion fond océanique; Epicentre; Carte bathymétrique; Fosse Havre</FD><FG>Océan Pacifique; Océan Pacifique Sud</FG><ED>seismicity; ocean bottom seismographs; tectonics; back-arc basins; Southwest Pacific; hypocenter; earthquakes; bathymetry; Lau Basin; Kermadec Trench; seismic waves; P-waves; seismic surveys; seismic refraction; extension tectonics; submarine volcanism; rifting; sea-floor spreading; epicenters; bathymetric maps</ED><EG>Pacific Ocean; South Pacific</EG><SD>Sismicidad; Sismógrafo fondo submarino; Tectónico; Cuenca marginal interna; Hipocentro; Sismo; Batimetría; Cuenca Lau; Onda sísmica; Onda P; Levantamiento sísmico; Método refracción sísmica; Volcanismo submarino; Expansión fondo oceánico; Epicentro; Mapa batimétrico</SD><LO>INIST-16687.354000089296070360</LO><ID>99-0447432</ID></server></inist></record>Pour manipuler ce document sous Unix (Dilib)
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