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<datestamp>2018-01-11</datestamp>
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<title lang=en>Multi-mode surface waveform tomography of the Pacific Ocean: A closer look at lithospheric cooling</title>
<creator>Maggi, Alessia</creator>
<creator>Debayle, Eric</creator>
<creator>Priestley, Keith</creator>
<creator>Barruol, Guilhem</creator>
<contributor>Institut de physique du globe de Strasbourg (IPGS) ; Institut national des sciences de l'Univers (INSU - CNRS) - Université Louis Pasteur - Strasbourg I - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Bullard Laboratories ; University of Cambridge [UK] (CAM)</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>
<contributor>Laboratoire de Tectonophysique (Tectonophysique) ; Université Montpellier 2 - Sciences et Techniques (UM2) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<source>ISSN: 0956-540X</source>
<source>EISSN: 1365-246X</source>
<source>Geophysical Journal International</source>
<publisher>Oxford University Press (OUP)</publisher>
<identifier>hal-00105949</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00105949</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00105949/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00105949/file/Maggi_Pacif_tomo_GJI2006.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00105949</source>
<source>Geophysical Journal International, Oxford University Press (OUP), 2006, 166 (3), pp.1384-1397. 〈10.1111/j.1365-246X.2006.03037.x〉</source>
<identifier>DOI : 10.1111/j.1365-246X.2006.03037.x</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2006.03037.x</relation>
<language>en</language>
<subject lang=en>lithosphere</subject>
<subject lang=en> Pacific Ocean</subject>
<subject lang=en> plate tectonics</subject>
<subject lang=en> Rayleigh waves</subject>
<subject lang=en> tomography</subject>
<subject>[PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We present a regional surface waveform tomography of the Pacific upper mantle, obtained using an automated multimode surface waveform inversion technique on fundamental and higher mode Rayleigh waves, to constrain the VSV structure down to ∼400 km depth. We have improved on previous implementations of this technique by robustly accounting for the effects of uncertainties in earthquake source parameters in the tomographic inversion. We have furthermore improved path coverage in the South Pacific region by including Rayleigh wave observations from the French Polynesian Pacific Lithosphere and Upper Mantle Experiment deployment. This improvement has led to imaging of vertical low-velocity structures associated with hotspots within the South Pacific Super-Swell region. We have produced an age-dependent averagecross-sectionforthePacificOceanlithosphereandfoundthattheincreaseinVSV with age is broadly compatible with a half-space cooling model of oceanic lithosphere formation. We cannot confirm evidence for a Pacific-wide reheating event. Our synthetic tests show that detailed interpretation of average VSV trends across the Pacific Ocean may be misleading unless lateral resolution and amplitude recovery are uniform across the region, a condition that is difficult to achieve in such a large oceanic basin with current seismic stations.</description>
<date>2006</date>
</dc>
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