Imaging of the Polynesian mantle plumes from seismic and geomagnetic observation on seafloor in French Polynesia

2010 Fiscal Year Final Research Report

• Project/Area Number: 19253004
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Solid earth and planetary physics
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: SUETSUGU Daisuke Japan Agency for Marine-Earth Science and Technology, 地球内部ダイナミクス領域, プログラムディレクター (20359178)
• Co-Investigator(Renkei-kenkyūsha): SHIOBARA Hajime 東京大学, 地震研究所, 准教授 (60211950) ; SUGIOKA Hiroko 独立行政法人海洋研究開発機構, 地球内部, イナミクス領域・技術研究主任 (00359184) ; ISSE Takehi 東京大学, 地震研究所, 助教 (60359180) ; KASAYA Takafumi 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 技術研究副主任 (90373456) ; TADA Noriko 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 技術研究副主任 (00509713) ; ITO Aki 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 技術研究主事 (90371723) ; BABA Kiyoshi 東京大学, 地震研究所, 助教 (70371721) ; TANAKA Satoru 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 主任研究員 (60281961) ; FUKAO Yoshio 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 領域長 (10022708)
• Research Collaborator: DOMINIQUE Reymond タヒチ地球物理学観測所, 所長 ; CLAUDIA Adam ポルトガル, エボラ大学地球科学教室, 助手
• Project Period (FY): 2007 – 2010
• Keywords: ホットスポット / マントルプルーム / 海底地震計 / 海底電磁気計 / トモグラフィ

Research Abstract

We deployed broadband seismographs, ocean bottom electro-magnetometers, and differential pressure gauges on the Polynesian seafloor from Feb. 2009 to Dec. 2010. The aim of the observation is to understand origins of hotspot volcanism of the Society Islands. The observation was completed with success. A preliminary data analysis shows a presence of slow seismic-wave velocities beneath the hotspot, which suggests a hot mantle plume as the origin of the volcanism of the Society hotspots.

Research Products

• [Journal Article] Depths of the 410-km and 660-km discontinuities in and around the stagnant slab beneath the Philippine Sea : Is water stored in the stagnant slab? (2010)
  • Author(s): Suetsugu, D., T.Inoue, M.Obayashi, A.Yamada, H.Shiobara, H.Sugioka, A.Ito, T.Kanazawa, H.Kawakatsu, A.Shito, Y.Fukao,
  • Journal Title: Phys. Earth Planet. Inter. 183 Pages: 270-279
  • Peer Reviewed
• [Journal Article] South Pacific hotspot swells dynamically supported by mantle flows, (2010)
  • Author(s): Adam, C., M.Yoshida, T.Isse, D.Suetsugu, Y.Fukao, G.Barruol
  • Journal Title: Geophys. Res.Lett. 37 Pages: L08302, doi:10.1029/2010GL042534
  • Peer Reviewed
• [Journal Article] Seismic discontinuities in the mantle transition zone and at the top of the lower mantle beneath eastern China and Korea : Influence of the stagnant Pacific slab, Phys. (2010)
  • Author(s): Gao, Y., D.Suetsugu, Y.Fukao, M.Obayashi, Y.Shi, R.Liu,
  • Journal Title: Earth Planet. Inter. Pages: 288-295
  • Peer Reviewed
• [Journal Article] Fast P and S wave velocities associated with the "cold" stagnant slab beneath the northern Philippine Sea, Phys. (2010)
  • Author(s): Sugioka, H., D.Suetsugu, M.Obayashi, Y.Fukao, Y.Gao
  • Journal Title: Earth Planet. Inter. 179 Pages: 1-6
  • Peer Reviewed
• [Journal Article] Evidence for infragravity wave-tide resonance in deep oceans (2010)
  • Author(s): Sugioka, H., Y.Fukao, N.Hibiya
  • Journal Title: Nature Communications 1 Pages: doi:10.1038/ncomms1083
  • Peer Reviewed
• [Journal Article] Electrical conductivity imaging of the Philippine Sea upper mantle using seafloor magnetotelluric data (2010)
  • Author(s): Baba, K., H.Utada, T.Goto, T.Kasaya, H.Shimizu, N.Tada
  • Journal Title: Phys.Earth Planet. Inter. 183 Pages: 270-279
  • Peer Reviewed
• [Journal Article] South Pacific mantle plumes imaged by seismic observation on islands and seafloor (2009)
  • Author(s): Suetsugu, D., T.Isse, S.Tanaka, M.Obayashi, H.Shiobara, H.Sugioka, T.Kanazawa, Y.Fukao, G.Barruol D.Reymond
  • Journal Title: Geochemistry, Geophysics, Geosystem 10 Pages: Q11014, doi : 10.1029/2009GC002533
  • Peer Reviewed
• [Journal Article] G. H. R. Bokelmann, F. R. Fontaine, and D. Reymond, Mapping upper mantle flow beneath French Polynesia from broadband ocean bottom seismic observations (2009)
  • Author(s): Barruol, G., D.Suetsugu, H.Shiobara, H.Sugioka, S.Tanaka
  • Journal Title: Geophys. Res. Lett. 36 Pages: L14301, doi : 10.1029/2009GL038139
  • Peer Reviewed
• [Journal Article] The vertical extent of the large low shear velocity province beneath the South Pacific Superswell, Geophys. (2009)
  • Author(s): Tanaka, S., D.Suetsugu, H. Shiobara, H.Sugioka, T.Kanazawa, Y.Fukao, G.Barruol, D.Reymond
  • Journal Title: Res.Lett. 36 Pages: L07305, doi : 10.1029/2009GL037568
  • Peer Reviewed
• [Journal Article] Seismic structure of the upper mantle beneath the Philippine Sea from seafloor and land observation : Implications for mantle convection and magma genesis in the Izu.Bonin.Mariana subduction zone (2009)
  • Author(s): Isse, T., H.Shiobara, Y.Tamura, D.Suetsugu, K.Yoshizawa, H.Sugioka, A.Ito, T.Kanazawa, M.Shinohara, K.Mochizuki, E.Araki, K.Nakahigashi, H.Kawakatsu, A.Shito, Y.Fukao, O.Ishizuka J.B.Gill
  • Journal Title: Earth Planet. Sci. Lett. 278 Pages: 107-119, doi:10.1016/j/epsl.2008.11.032
  • Peer Reviewed
• [Journal Article] Trial of multidisciplinary observation at an expandable sub-marine cabled station "off-Hatsushima Island Observatory" in Sagami Bay (2009)
  • Author(s): Kasaya, T.(他11名中、第1著者)
  • Journal Title: Sensors 9 Pages: 9241-9254
  • Peer Reviewed
• [Journal Article] Seafloor topography, ocean infragravity waves and background Love and Rayleigh Waves (2009)
  • Author(s): Fukao, Y., K.Nishida, N.Kobayashi
  • Journal Title: J. Geophys. Res. Pages: doi : 10.1029/2009JB006678
  • Peer Reviewed
• [Journal Article] 海底地震計用軽量自律型センサーの開発 (2009)
  • Author(s): 塩原肇
  • Journal Title: 地震2 61 Pages: 137-144
  • Peer Reviewed
• [Journal Article] P-wave tomography of the mantle beneath the South Pacific Superswell revealed by joint ocean floor and islands broadband seismic experiments, (2008)
  • Author(s): Tanaka, S., D.Suetsugu, M.Obayashi, H.Shiobara, H.Sugioka, Y.Fukao, T.Kanazawa, G.Burruol,
  • Journal Title: Phys. Earth Planet. Inter. 172 Pages: 268-277
  • Peer Reviewed
• [Journal Article] 深海巡航AUV「うらしま」によって得られた相模湾初島沖の海底地すべり音響イメージ (2007)
  • Author(s): 笠谷貴史(他9名、第1著者)
  • Journal Title: 海洋調査技術 19 Pages: 11-17
  • Peer Reviewed
• [Journal Article] Possibility of a low P-wave velocity layer in the outermost core from global SmKS waveforms (2007)
  • Author(s): Tanaka, S.
  • Journal Title: Earth Planet. Sci. Lett. 259 Pages: 486-499
  • Peer Reviewed
• [Presentation] Imaging and Understanding the Electrical Conductivity of Earth's Mantle; Lab Measurements, Regional and Global Studies, and Physical Interpretations (2010)
  • Author(s): Tada, N
  • Organizer: AGU Fall Meeting
  • Place of Presentation: Moscone Center, San Francisco, USA.
  • Year and Date: 2010-12-14
• [Presentation] Detection of near-source ground motions associated with VLF (very low frequency) earthquakes beneath the forearc slope of the Nankai trough by broadband ocean bottom seismometers (2010)
  • Author(s): Sugioka H.
  • Organizer: AGU Fall Meeting
  • Place of Presentation: Moscone Center, San Francisco, USA.
  • Year and Date: 2010-12-14
• [Presentation] Depth extent of hemispherical difference in equatorial path velocities in the upper inner core (2010)
  • Author(s): Tanaka, S.
  • Organizer: AGU Fall Meeting
  • Place of Presentation: Moscone Center, San Francisco, USA.
  • Year and Date: 2010-12-13
• [Presentation] Deep Earth opportunities for EPOBS (2010)
  • Author(s): Tanaka, S.
  • Organizer: Experiments with Portable Ocean Bottom Seismographs (EPOBS)
  • Place of Presentation: Snowbird Resort, Snowbird, Utah. USA.
  • Year and Date: 2010-09-27
• [Presentation] Reduction of oceanic/seafloor noise (2010)
  • Author(s): Tanaka, S.
  • Organizer: Experiments with Portable Ocean Bottom Seismographs (EPOBS)
  • Place of Presentation: Snowbird Resort, Snowbird, Utah. USA.
  • Year and Date: 2010-09-27
• [Presentation] A three-dimensional inversion of marine magnetotelluric data: Extended version of WSINV3DMT (2010)
  • Author(s): Tada, N.
  • Organizer: The 20th International Workshop on EM Induction in The Earth
  • Place of Presentation: Cataract Pyramids Resort, Giza, Egypt.
  • Year and Date: 2010-09-20
• [Presentation] Array analysis of PKP(BC) phase with station corrections for travel times and amplitudes (2009)
  • Author(s): Tanaka, S.
  • Organizer: AGU Fall Meeting 2009
  • Place of Presentation: Moscone Center, San Francisco, USA.
  • Year and Date: 2009-12-16
• [Presentation] Recent progress of the Electro-Magnetic survey using ocean bottom electro magnetometer (2009)
  • Author(s): Kasaya, T.
  • Organizer: RAEG2009
  • Place of Presentation: 京都大学
  • Year and Date: 2009-10-16
• [Presentation] First step for mobile ocean bottom broadband seismic observation of the next generation (2009)
  • Author(s): Shiobara, H.
  • Organizer: Workshop for developing a broadband ocean bottom seismometer pool in the UK
  • Place of Presentation: NOC Southampton, UK.
  • Year and Date: 2009-09-15
• [Presentation] Modifications on wsinv3dmt to apply seafloor MT data (2009)
  • Author(s): Tada, N.
  • Organizer: IAGA2009
  • Place of Presentation: Liszt Ferenc Conference Center, Sopron, Hungary.
  • Year and Date: 2009-08-26
• [Presentation] Submarine volcanic activity in French Polynesia detected by broadband ocean bottom seismographs (2009)
  • Author(s): Ito, A.
  • Organizer: International Scientific Studies 2009
  • Place of Presentation: Hofburg Congress Center Vienna, Austria.
  • Year and Date: 2009-06-15
• [Presentation] First stp for mobile ocean bottom broadband seismic observation of the next generation (2008)
  • Author(s): Shiobara, H.
  • Organizer: AGU 2008 Fall meeting
  • Place of Presentation: Moscone Center, San Francisco, USA.
  • Year and Date: 2008-12-17
• [Presentation] S-wave velocity structure beneath the South Pacific superswell, derived from passive seismic experiments (2008)
  • Author(s): Tanaka, S.
  • Organizer: AGU 2008 Fall meeting
  • Place of Presentation: Moscone Center, San Francisco, USA.
  • Year and Date: 2008-12-15
• [Presentation] P-wave travel time tomography in the mantle beneath the South Pacific superswell (2008)
  • Author(s): Tanaka, S.
  • Organizer: the 7^th General Assembly of Asian Seismological Comission
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2008-11-25
• [Presentation] French Polynesia hotspot swells explained by dynamic topography (2007)
  • Author(s): Adam, C.
  • Organizer: AGU 2007 Fall meeting
  • Place of Presentation: Moscone Center, San Francisco, USA.
  • Year and Date: 2007-12-11
• [Presentation] Seismic image of the South Pacific superswell (2007)
  • Author(s): Suetsugu, D.
  • Organizer: SOPAC 2007 annual meeting
  • Place of Presentation: ヌクアロファ(トンガ王国)
  • Year and Date: 2007-11-22