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<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>P-wave tomography of the mantle beneath the South Pacific Superswell revealed by joint ocean floor and islands broadband seismic experiments</title>
<creator>Tanaka, S.</creator>
<creator>Obayashi, M.</creator>
<creator>Suetsugu, D.</creator>
<creator>Shiobara, H.</creator>
<creator>Sugioka, H.</creator>
<creator>Yoshimitsu, J.</creator>
<creator>Kanazawa, T.</creator>
<creator>Fukao, Y.</creator>
<creator>Barruol, Guilhem</creator>
<contributor>Institute for Research on Earth Evolution (IFREE), JAMSTEC, Yokosuka ; Japan Agency for Marine-Earth Science and Technology (JAMSTEC)</contributor>
<contributor>Earthquake Research Institute, University of Tokyo ; The University of Tokyo</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0031-9201</source>
<source>EISSN: 0031-9201</source>
<source>Physics of the Earth and Planetary Interiors</source>
<publisher>Elsevier</publisher>
<identifier>hal-00413036</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00413036</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00413036/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00413036/file/Tanaka_tomo_PLUME_PEPI2009_hal.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00413036</source>
<source>Physics of the Earth and Planetary Interiors, Elsevier, 2009, 172 (3-4), pp.268-277. 〈10.1016/j.pepi.2008.10.016〉</source>
<identifier>DOI : 10.1016/j.pepi.2008.10.016</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pepi.2008.10.016</relation>
<language>en</language>
<subject lang=en>PLUME project</subject>
<subject lang=en>French Polynesia</subject>
<subject lang=en>P-wave tomography</subject>
<subject lang=en>Broadband ocean bottom seismograph (BBOBS)</subject>
<subject lang=en>South Pacific Superswell</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<subject>[PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Three-dimensional P-wave velocity structure of the mantle beneath the South Pacific Superswell is determined through passive broadband seismic experiments on the ocean floor and islands between 2003 and 2005. We collected approximately 1500 relative times of long-period teleseismic P-waves by using a waveform cross-correlation. We analyzed this data set with relative time tomography to depths of 2000 km. The resultant structure shows lateral heterogeneity of approximately +/- 2%, in which a distinct low velocity region is found beneath the center of the Superswell at a depth of 1600 km. At 1200km depth, an elongated low velocity region is found beneath the Society to Pitcairn hotspots. At 800 km depth, two linear low velocity regions are located beneath Tuamotu and Austral islands. Isolated low velocity regions are identified beneath the Society, Marquesas, and Macdonald hotspots at 400 km depth. Our new tomographic images reveal that the large low velocity region rooted in the deep lower mantle is split into two sheets at 1200 km depth and these terminate at approximately 800 km depth. This feature appears to be consistent with the characteristics of a thermo-chemical pile or dome.</description>
<date>2009</date>
</dc>
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