Formation processes of intra-oceanic arc-mantle wedge imaging in the Izu-Bonin arc-

2010 Fiscal Year Final Research Report

• Project/Area Number: 20340122
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: KODAIRA Shuichi Japan Agency for Marine-Earth Science and Technology, 地球内部ダイナミクス領域, チームリーダー (80250421)
• Co-Investigator(Kenkyū-buntansha): TAKAHSHI Narumi 独立行政法人海洋研究開発機構, 地球内部ダイナミクス研究領域, 技術研究主幹 (70359131) ; OBANA Koichiro 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, 研究員 (10359200) ; TAKAHASHI Tsutomu 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, 研究員 (90435842) ; TAMURA Yoshihiko 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, チームリーダー (40293336)
• Project Period (FY): 2008 – 2010
• Keywords: 島弧火山 / 大陸地殻 / マントルイメージング

Research Abstract

In order to understand formation processed of an intra-oceanic arc, we performed seismic tomography for mantle wedge imaging by using existing earthquake data in the northern Izu arc. Results of mantle imaging shows that there are low velocity mantle wedge beneath areas where thick island arc crust is observed. In addition to the mantle imaging, we carried out OBS experiment to obtain new earthquake data in the southern Izu-Bonin arc.

Research Products

• [Journal Article] Random inhomogeneities in the northern Izu-Bonin arc estimated by tomographic inversion of peak delay times of S wave seismograms (2011)
  • Author(s): Takahashi, T., Obana, K., Kodaira, S., Suetsugu, D., Takahashi, N., Kamiya, S., Tamura, Y.
  • Journal Title: J.Geophys. Res.,AGU 116 Pages: doi:10.1029/2010JB007691
  • Peer Reviewed
• [Journal Article] Along-arc variation in seismic velocity structure related to variable growth of arc crust in northern Izu-Bonin intraoceanic arc (2010)
  • Author(s): Obana, K., Kamiya, S., Kodaira, S., Suetsugu, D., Takahashi, N., Takahashi, T., Tamura, Y.
  • Journal Title: Geochem. Geophys. Geosyst. 11 Pages: doi:10.1029/2010GC003146
  • Peer Reviewed
• [Journal Article] Missing Oligocene Crust of the Izu.Bonin Arc : Consumed or Rejuvenated During Collision? (2010)
  • Author(s): Tamura, Y., Ishizuka, O., Aoike, K., Kawate, S., Kawabata, H., Chang, Q., Saito, S., Tatsumi, Y., Arima, M., Takahashi, M., Kanamaru, T., Kodaira, S., Fiske, R. S.
  • Journal Title: J.Petrol. 51 Pages: 823-846, doi:10.1093/petrology/egq002
  • Peer Reviewed
• [Journal Article] Evolution from fore-arc oceanic crust to island arc crust : A seismic study along the Izu-Bonin fore arcs (2010)
  • Author(s): Kodaira, S., Noguchi, N., Takahashi, N., Ishizuka, O., Kaneda, Y.
  • Journal Title: J.Geophys. Res. 115 Pages: doi:10.1029/2009JB006968
  • Peer Reviewed
• [Journal Article] 日本周辺沈み込み帯での海域地下構造探査 (2009)
  • Author(s): 小平秀一
  • Journal Title: 地震 61 Pages: 155-163
  • Peer Reviewed
• [Journal Article] Structural variations of arc crusts and rifted margins in the southern Izu-Ogasawara arc.back arc systems (2009)
  • Author(s): Takahashi, N., Kodaira, S., Tatsumi, Y., Yamashita, M., Sato, T., Kaiho, Y., Miura, S., No, T., Takizawa, K., Kaneda, Y.
  • Journal Title: Geochem. Geophys. Geosyst. 10 Pages: doi:10.1029/2008GC002146
  • Peer Reviewed
• [Journal Article] Silicic Magmas in the Izu-Bonin Oceanic Arc and Implications for Crustal Evolution, (2009)
  • Author(s): Tamura, Y., Gill, J. B., Tollstrup, D., Kawabata, H., Shukuno, H., Chang, Q., Miyazaki, T., Takahashi, T., Hirahara, Y., Kodaira, S., Ishizuka, O., Suzuki, T., Kido, Y., Fiske, R. S., Tatsumi, Y.
  • Journal Title: J.Petrology 50 Pages: 685-723, doi:10.1093/petrology/egp017
  • Peer Reviewed
• [Journal Article] Seismic imaging of a possible paleoarc in the Izu-Bonin intraoceanic arc and its implications for arc evolution processes (2008)
  • Author(s): Kodaira, S., Sato, T., Takahashi, N., Yamashita, M., No, T., Kaneda, Y.
  • Journal Title: Geochem. Geophys. Geosyst. 9 Pages: doi:10.1029/2008GC002073
  • Peer Reviewed
• [Presentation] Intrinsic absorption structure of S-wave in the northeastern Japanand northern Izu-Bonin arc (2010)
  • Author(s): Takahashi T., et al.
  • Organizer: Americal Geophysical Union
  • Place of Presentation: San Francisco.
  • Year and Date: 2010-12-15
• [Presentation] Crustal structure and growth of the Izu-Bonin-Mariana arc (2010)
  • Author(s): Takahashi N., et al.
  • Organizer: Western Pacific Geophysical Union
  • Place of Presentation: Taipei.
  • Year and Date: 2010-06-24
• [Presentation] Result of active-source seismic imaging in Izu-Bonin intra-oceanic arc and its implications for arc evolution (2010)
  • Author(s): Kodaira, S., et al.
  • Organizer: Japan Geoscience Union
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2010-05-26
• [Presentation] Forearc oceanic crust in the Izu-Bonin arc-new insights from active-source seismic survey- (2009)
  • Author(s): Kodaira, S., et al.
  • Organizer: 2009 AGU Fall meeting
  • Place of Presentation: San Francisco.
  • Year and Date: 2009-12-16
• [Presentation] Crustal rifting and magmatic underplating in the Izu-Ogasawara (Bonin) intra-oceanic arc detected by active source seismic studies (2009)
  • Author(s): Takahashi, N., et al.
  • Organizer: 2009 AGU Fall meeting
  • Place of Presentation: San Francisco
  • Year and Date: 2009-12-16
• [Presentation] The Missing Oligocene Izu-Bonin Arc Crust : Consumed or Rejuvenated During Collision? (2009)
  • Author(s): Tamura, Y., et al.
  • Organizer: 2009 AGU Fall meeting
  • Place of Presentation: San Francisco.
  • Year and Date: 2009-12-16
• [Presentation] Seismic velocity structure variation along northern Izu-Bonin arc (2009)
  • Author(s): Obana, K., et al.
  • Organizer: 2009 AGU Fall meeting
  • Place of Presentation: San Francisco.
  • Year and Date: 2009-12-16
• [Presentation] Seismological constraints on crustal formation processes in the Izu-Bonin intra-oceanic subduction zone (2008)
  • Author(s): Kodaira, S., et al.
  • Organizer: 2008 AGU Fall meeting
  • Place of Presentation: San Francisco.
  • Year and Date: 2008-12-16
• [Presentation] Crustal formation process and mass transfer in the Izu-Bonin subduction factory revealed by active-passive seismic studies (2008)
  • Author(s): Kodaira, S., et al.
  • Organizer: 2008 EGU general assembly
  • Place of Presentation: Vienna.
  • Year and Date: 2008-04-15
• [Book] Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin (2011)
  • Author(s): Narumi Takahashi, et al.
  • Total Pages: 75-95
  • Publisher: Springer, Rifting structure of central Izu-Ogasawara (Bonin) arc crust : Results of seismic crustal imaging