Study of deep structure of various trench-ridge system, and that of present activity elucidated by micro earthquake observation

2004 Fiscal Year Final Research Report Summary

• Project/Area Number: 13373001
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: 固体地球物理学
• Research Institution: National Institute of Polar Research (2004); Hokkaido University (2001-2003)
• Principal Investigator: SHIMAMURA Hideki National Institute of Polar Research, Director, 所長 (10011636)
• Co-Investigator(Kenkyū-buntansha): NARUSE Renji Hokkaido Univ., Low Temperature Institute, Assistant Prof., 低温科学研究所, 助教授 (10002099) ; TAKANAMI Tetsuo Hokkaido Univ., Faculty of Science, Assistant Prof., 大学院・理学研究科, 助教授 (60002177) ; MURAI Yoshio Hokkaido Univ., Faculty of Science, Research Assistant, 大学院・理学研究科, 助手 (40301931)
• Project Period (FY): 2001 – 2004
• Keywords: earthquake observations / plate boundary / micro earthquakes / Ocean Bottom Seismograph / Mid Ocean Ridge / subbottom structure / tectonics / earthquake foci distribution

Research Abstract

The aim of this research "Study of deep structure of various trench-ridge system, and that of present activity elucidated by micro earthquake observation" was to study present activity and subbottom structure of the sites where plates were made, as well as the sites of plate boundaries.
In order to make this kind of studies, it is essential to deploy a number of seismographs in order to make natural earthquake observations and/or to make controlled source seismological studies. Every year from 2001 through 2004 we made successfully sensitive seismographic studies in various important sites.
Many interesting sites of geoscience are beneath sea bottom because new plates were only born on the sea bottoms, so that sensitive and reliable OBS (Ocean Bottom Seismographs) are indispensable to make this kind of studies. The OBS, which has been successfully developed by Shimamura and his group since late 1960's, were commonly used in this study.
In 2001, two expeditions were made, in the Marmara Sea, Turkey, and in the Carribean Sea near Guadelupe and Martinique Islands. In 2002 the expedition was made in the North Atlantic - Arctic Sea region near Svalbard Islands. This study was for controlled source seismology to illustrate subbottom deep structure. In 2003 the expedition was made in the Norwegian Sea, off the west coast of Norway. The aim of this research was to elucidate the history of the opening of the Atlantic Ocean, and present activity and situation of the Atlantic Ocean. In 2004, the expedition was made in the Southern Argentina, Fiego Islands, where the plate boundary of the Scotia plate crosses the Island. Micro earthquake study has illustrated the exact position of the present plate boundary and the activity of the plate boundary.

Research Products

• [Journal Article] Lepine Refraction reflection seismic reconnaissance of the Lesser Antilles subduction zone (Guadeloupe and Martinique Islands). (2006)
  • Author(s): Roux, E, Laigle, M, Sapin, M, Him, A, De Voogd, B., Charvis P., Hello, Y., Murai, Y., Nishimura, Y., Shimamura, H., Galve A.
  • Journal Title: EGU, April 2006 General Assembly, Wien
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Elements of the Seismic Structure and Activity of the Lesser Antilles Subduction Zone (Guadeloupe and Martinique Islands) from the SISMANTILLES Seismic Survey. (2005)
  • Author(s): Laigle, M., Roux, E., Sapin, M., Him, A., De Voogd, B., Charvis P., Hello, Y., Murai, Y., Nishimura, Y., Shimamura, H., Galve A., Lepine, J-C., Lebrun J.-F., Diaz, J., Gallart, J., Beauducel, F., Viode, J.-P.
  • Journal Title: AGU, 2005 Fall Meeting (San Francisco)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Crustal transect from the North Atlantic Knipovich Ridge to the Svalbard Margin west of Hornsund (2004)
  • Author(s): Ljones, F.
  • Journal Title: Tectonophysics 378 Pages: 17-41
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Crustal transect from the North Atlantic Knipovich Ridge to the Svalbard Margin west of Hornsund. (2004)
  • Author(s): Ljones, E, Kuwano, A., Mjelde, R., Breivik, A., Shimamura, H., Murai, Y., Nishimura, Y.
  • Journal Title: Tectonophysics 378 Pages: 17-41
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Seismic Structure and Activity of the North Anatolian Fault in the Sea of Marmara from the SEISMARMARA Leg1 Seismic Survey. (2004)
  • Author(s): Becel, A., Charvis P., De Voogd, B., Galve, A., Him, A., Laigle, M., Lepine J.-C., Murai, Y., Ozalaybey, S., Sapin, M., Shimamura, H., Singh, S., Taymaz, T.
  • Journal Title: AGU, 2004 Fall Meeting (San Francisco)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Spatial relationship between recent compressional structures and older high-velocity crustal structures; Examples from the Voring Margin, NE Atlantic, and Northern Honshu, Japan. (2003)
  • Author(s): Mjelde, R.
  • Journal Title: Journal of Geodynamic 36 Pages: 537-562
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Vp/Vs ratio along the Voring Margin, NE Atlantic, derived from OBS data : implications on lithology and stress field (2003)
  • Author(s): Mjelde, R.
  • Journal Title: Tectonophysics 369 Pages: 175-197
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Crustal lineaments, distribution of lower crustal intrusives and structural evolution of the Voring Margin, NE Atlantic; new insight from wide-angle seismic models (2003)
  • Author(s): Mjelde, R
  • Journal Title: Tectonophysics 369 Pages: 199-218
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Crustal structure and transform margin development south of Svalbard based on ocean bottom seismometer data (2003)
  • Author(s): Breivik, A.J.
  • Journal Title: Tectonophysics 369 Pages: 37-70
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Regional and semi-regional modeling of wide-angle shear waves in OBS data from the Voring Basin, N. Nowray - a comparison (2003)
  • Author(s): Digranes, P.
  • Journal Title: Earth Planets Space 55 Pages: 65-81
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Acquisition, processing and analysis of densely sampled P- and S-wave OBS-data on the mid-Norwegian Margin, NE Atlantic (2003)
  • Author(s): Mjelde, R.
  • Journal Title: Earth Planets Space 54 Pages: 1219-1236
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Spatial relationship between recent compressional structures and older high-velocity crustal structures ; Examples from the Voring Margin, NE Atlantic, and Northern Honshu, Japan. (2003)
  • Author(s): Mjelde, R., Iwasaki, T., Shimamura, H., Kanazawa, T., Kodaira, S., Raum, T., Shiobara, H.
  • Journal Title: Journal of Geodynamics 36 Pages: 537-562
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Vp/Vs ratio along the Voring Margin, NE Atlantic, derived from OBS data : implications on lithology and stress field. (2003)
  • Author(s): Mjelde, R., Raum, T., Digranes, P., Shimamura, H., Shiobara, H., Kodaira, S.
  • Journal Title: Tectonophysics 369,Issues3-4 Pages: 175-197
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Crustal lineaments, distribution of lower crustal intrusives and structural evolution of the Voring Margin, NE Atlantic ; new insight from wide-angle seismic models. (2003)
  • Author(s): Mjelde, R., Shimamura, H., Kanazawa, T., Kodaira, S., Raum, T., Shiobara, H.
  • Journal Title: Tectonophysics 369,Issues3-4 Pages: 199-218
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Crustal structure and transform margin development south of Svalbard based on ocean bottom seismometer data. (2003)
  • Author(s): Breivik, A.J., Mjelde, R., Grogan, P., Shimamura, H., Murai, Y., Nishimura, Y.
  • Journal Title: Tectonophysics 369,1-2 Pages: 37-70
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Regional and semi-regional modeling of wide-angle shear waves in OBS data from the Voring Basin, N. Nowray - a comparison. (2003)
  • Author(s): Digranes, P., Mjelde, R., Kodaira, S., Shimamura, H., Kanazawa, T., Shiobara, H.
  • Journal Title: Earth Planets Space 55 Pages: 65-81
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Elements of structure at crustal scale under the Sea of Marmara from multichannel seismics of the SEISMARMARA survey. (2003)
  • Author(s): Hirn, A., Singh, S., Saatcilar, R., Laigle, M., de Voogd, B., Taymaz, T., Ozalaybey, S., Cetin, S., Becel, A., Vigner, A., Carton, H., Shimamura, H., Lepine, J.-C., Sapin, M., Charvis, P., Karabulut, H., Geli, L.
  • Journal Title: EGS-AGU-EUG joint Assembly (Nice 2003)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Refraction and wide-angle reflection, examples of OBS velocity and depth-prolongation of vertical-reflection in Seismarmara. (2003)
  • Author(s): Becel, A., Shimamura, H, Lepine, J.-C., Taymaz, T., Murai, Y., Charvis, P., Nishimura, Y., Yamada, A., Ozalaybey, S., Tan, 0., Yolsal, S., Laigle, M., Him, A., Singh, S., Geli, L., Karabulut, H.
  • Journal Title: EGS-AGU-EUG joint Assembly (Nice 2003)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Refraction and Wide-Angle Reflection Studies by Use Of MCS and OBS in Marmara Sea, TURKEY (SEISMARMARA 2001) (2003)
  • Author(s): H.Shimamura (ISV Sapporo), A.Becel (IPG Paris), J-C.Lepine (IPG Paris), T.Taymaz (ITU Istanbul), Y.Murai (ISV Sapporo), P.Charvis (IRD Azur), Y.Nishimura (ISV Sapporo), M.Laigle (IPG Paris), A.Hirn (IPG Paris), S.Ozalaybey (Tubitak-Mam, Gebze ), O.Tan (ITU), S.Yolsal (ITU), S.Singh (Geosciences Marines, Institut de Physique du Globe de Paris), L.Geli (Geosciences Marines, DRO/GM, Ifremer, Brest), H.Karabulut (Kandilli Observatory and Research Institute, Istanbul.)
  • Journal Title: IUGG General Assembly (2003 July Sapporo) Session code : SS03 Date time : Monday, July 7 AM, Session room : Site A (Royton Sapporo), Room
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Lower crustal seismic velocity-anomalies; magmatic underplating or sepentinized peridotite? Evidence from the Voring Margin, NE Atlantic (2002)
  • Author(s): Mjelde, R.
  • Journal Title: Marine Geophysical Researches 23 Pages: 125-145
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] possible Caledonide arm through the Barents Sea imaged by OBS data (2002)
  • Author(s): Breivik, A.J.
  • Journal Title: Tectonophysics 355 Pages: 67-97
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Crustal structure of the southern part of the Voring Basin, mid-Norway margin, from wide-angle seismic and gravity data (2002)
  • Author(s): Raum, T.
  • Journal Title: Tectonophysics 355 Pages: 99-126
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Where do P-S conversion occur ? Analysis of OBS data from the NE Atlantic Margin (2002)
  • Author(s): Mjelde, R.
  • Journal Title: first break 20 Pages: 153-160
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Acquisition, processing and analysis of densely sampled P- and S-wave OBS-data on the mid-Norwegian Margin, NE Atlantic. (2002)
  • Author(s): Mjelde, R., Timenes, T., Shimamura, H., Kanazawa, T., Shiobara, H., Kodaira, S., Nakanishi, A.
  • Journal Title: Earth Planets Space 54 Pages: 1219-1236
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Vp/Vs-ratios from the central Kolbeinsey ridge to the Jan Mayen basin, North Atlantic; implications for lithology, porosity and present-day stress field. (2002)
  • Author(s): Mjelde, R., Aurvaag, R., Kodaira, S., Shimamura, H., Gunnarsson, K., Nakanishi, A., Shiobara, H.
  • Journal Title: Marine Geophysical Researches 23 Pages: 125-145
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Lower crustal seismic velocity-anomalies ; magmatic underplating or sepentinized peridotite? Evidence from the Voring Margin, NE Atlantic. (2002)
  • Author(s): Mjelde, R., Kasahara, J., Shimamura, H., Kamimura, A., Kanazawa, T., Kodaira, S., Raum, T., Shiobara, H.
  • Journal Title: Marine Geophysical Researches 23 Pages: 169-183
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] A possible Caledonide arm through the Barents Sea imaged by OBS data. (2002)
  • Author(s): Breivik, A., Mjelde, R., Grogan, P., Shimamura, H., Murai, Y., Nishimura, Y., Kuwano, A.
  • Journal Title: Tectonophysics 355 Pages: 67-97
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Crustal structure of the southern part of the Voring Basin, mid-Norway margin, from wide-angle seismic and gravity data. (2002)
  • Author(s): Raum, T., Mjelde, R., Digranes, P., Shimamura, H., Shiobara, H., Kodaira, S., Haatvedt, G, Sorenes, N., Thorbjornsen, T.
  • Journal Title: Tectonophysics 355 Pages: 99-126
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Where do P-S conversion occur? Analysis of OBS data from the NE Atlantic Margin, (2002)
  • Author(s): Mjelde, R., Fjellanger, J.P., Raum, T., Digranes, P., Kodaira, S., Breivik, A, mamura, H.
  • Journal Title: first break 20 Pages: 153-160
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Crustal structure of the outer Voring Plateau, offshore Norway, from ocean bottom seismic and gravity data (2001)
  • Author(s): Mjelde, R.
  • Journal Title: Journal of Geophysical Research 106 Pages: 6769-6791
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Three component OBS-data processing for lithology and fluid prediction in the mid-Norway margin, NE Atlantic (2001)
  • Author(s): Berg, E.
  • Journal Title: Earth, Planets and Space 53 Pages: 75-89
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Crustal structure of the outer Voring Plateau, offshore Norway, from ocean bottom seismic and gravity data. (2001)
  • Author(s): Mjelde, R., Digranes, P., Van Schaack, M., Shimamura, H., Shiobara, H.Kodaira, S., Naess, O., Sorenes, N., Vaagnes, E.
  • Journal Title: Journal of Geophysical Research 106, B4 Pages: 6769-6791
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Three component OBS-data processing for lithology and fluid prediction in the mid-Norway margin, NE Atlantic. (2001)
  • Author(s): Berg, E., Amundsen, L., Morton, A., Mjelde, R., Shimamura, H., Shiobara, H., Kanazawa, T., Kodaira, S., J.P.Fjellanger, J.P.
  • Journal Title: Earth, Planets and Space 53 Pages: 75-89
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Geological development of the Sorvestsnaget Basin, SW Barents Sea, from ocean bottom seismic, surface seismic and potential field data.
  • Author(s): Mjelde, R.
  • Journal Title: Norwegian Journal of Geology (印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Geological development of the Sorvestsnaget Basin, SW Barents Sea, from ocean bottom seismic, surface seismic and potential field data.
  • Author(s): Mjelde, R., Breivik, A., Elstad, H., Ryseth, AE., Skilbrei, J.R., Opsal, J.G, Shimamura, H., Murai, Y., Nishimura, Y.
  • Journal Title: Norwegian Journal of Geology (accepted)
  • Description: 「研究成果報告書概要(欧文)」より
• [Book] ポケット図解 最新 地震がよ〜くわかる本 (2005)
  • Author(s): 島村英紀
  • Total Pages: 304
  • Publisher: 秀和システム
  • Description: 「研究成果報告書概要(和文)」より
• [Book] 地震学がよくわかる---誰も知らない地球のドラマ (2002)
  • Author(s): 島村英紀
  • Total Pages: 256
  • Publisher: 彰国社
  • Description: 「研究成果報告書概要(和文)」より