東北地方太平洋沖地震後の緊急調査掘削（IODP第343次航海：J-FAST）の成果
海洋では初となる緊急掘削調査（地震直後に科学目的のために行われる掘削調査）が2011年東北地方太平洋沖地震の後に日本海溝で実施され，巨大地震に伴って生じた巨大津波のメカニズムについて多くの知見が得られた．中でも，1）断層帯が薄く（5m）弱かった（低速すべり条件と高速すべり条件でそれぞれ摩擦係数0.2-0.26と0.08-0.1）こと，2）この低摩擦の性質は，断層帯に粘土鉱物の一種であるスメクタイトが多く含まれることとThermal pressurization と呼ばれる摩擦熱による間隙水圧上昇が原因であること，3）地震前と地震後で応力環境が圧縮から伸張に激変していること，などが主要成果である...
Saved in:
| Published in | Chishitsugaku zasshi Vol. 124; no. 1; pp. 67 - 76 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Japanese |
| Published |
Tokyo
一般社団法人 日本地質学会
15.01.2018
Japan Science and Technology Agency |
| Subjects | |
| Online Access | Get full text |
Cover
Loading…
| Abstract | 海洋では初となる緊急掘削調査（地震直後に科学目的のために行われる掘削調査）が2011年東北地方太平洋沖地震の後に日本海溝で実施され，巨大地震に伴って生じた巨大津波のメカニズムについて多くの知見が得られた．中でも，1）断層帯が薄く（5m）弱かった（低速すべり条件と高速すべり条件でそれぞれ摩擦係数0.2-0.26と0.08-0.1）こと，2）この低摩擦の性質は，断層帯に粘土鉱物の一種であるスメクタイトが多く含まれることとThermal pressurization と呼ばれる摩擦熱による間隙水圧上昇が原因であること，3）地震前と地震後で応力環境が圧縮から伸張に激変していること，などが主要成果である．残された課題として，1）海底から基盤岩までの連続した物性や，2）側方へのすべり不均一性を決定する要素を把握・理解することが挙げられる．これらを解決するためには，近い将来に再び科学掘削が実施されることが望まれる． |
|---|---|
| AbstractList | The first offshore ‘rapid response drilling,’ a drilling immediately after an earthquake for a scientific purpose, was conducted at the Japan Trench after the 2011 off the Pacific coast of Tohoku Earthquake as IODP Expedition 343. It brought various insights into the mechanism of huge tsunami induced by the mega earthquake. Major findings include 1) the fault zone is thin (5 meters) and weak (0.2-0.26 and 0.08-0.1 as its friction coefficient under low and high velocity slip conditions respectively), 2) low friction of the fault zone at seismic slip rates is due to abundance of smectite (a clay mineral) and thermal pressurization effects that can explain the large co-seismic slip, 3) the stress field dramatically changed from compressional (pre-earthquake) to extensional (post-earthquake). Remaining issues are to understand 1) the complete profile of physical property from the seafloor to the basement, 2) the factors that determine the slip heterogeneity along strike. Another scientific drilling is expected to solve these in near future. 海洋では初となる緊急掘削調査（地震直後に科学目的のために行われる掘削調査）が2011年東北地方太平洋沖地震の後に日本海溝で実施され，巨大地震に伴って生じた巨大津波のメカニズムについて多くの知見が得られた．中でも，1）断層帯が薄く（5m）弱かった（低速すべり条件と高速すべり条件でそれぞれ摩擦係数0.2-0.26と0.08-0.1）こと，2）この低摩擦の性質は，断層帯に粘土鉱物の一種であるスメクタイトが多く含まれることとThermal pressurization と呼ばれる摩擦熱による間隙水圧上昇が原因であること，3）地震前と地震後で応力環境が圧縮から伸張に激変していること，などが主要成果である．残された課題として，1）海底から基盤岩までの連続した物性や，2）側方へのすべり不均一性を決定する要素を把握・理解することが挙げられる．これらを解決するためには，近い将来に再び科学掘削が実施されることが望まれる． |
| Author | 小平, 秀一 林, 為人 氏家, 恒太郎 山田, 泰広 Mori, Jim |
| Author_xml | – sequence: 1 fullname: 山田, 泰広 organization: 海洋研究開発機構海洋掘削科学研究開発センター – sequence: 2 fullname: Mori, Jim organization: 京都大学防災研究所 – sequence: 3 fullname: 氏家, 恒太郎 organization: 海洋研究開発機構海洋掘削科学研究開発センター – sequence: 4 fullname: 林, 為人 organization: 京都大学大学院工学研究科 – sequence: 5 fullname: 小平, 秀一 organization: 海洋研究開発機構地震津波海域観測研究開発センター |
| BookMark | eNo9kE1LAlEUhi9hkJn79q3H7sfMHWcplmkIBtn6cp0PU8yxGV20q1VqEq0swoqgNiLRJyJJ_ZiYq638C40Zbc4Lh-c9B55FECjbZROAZQQjiqIqq3nTdm09giFSIxBG4RwIIiJrkqZREgBBCBGVVErgAgi7biEHIdQIJSoOAi6unrzWudd5FO2Bd9f1Bi_i9UQ8t_3Nd-fY-2h9HT2M-k1xeD_ufoqbd3F64TWak2E9lVnbGvV6RCaidzuud8VbfzK83JQSse3sZNjwa6J-Jq47S2De4iXXDP9lCOwk1rPxpJTObKTisbRUxIhCycrpiFDZgoZhIU4wNqOKgg1EDaioPGpg2cIcY00jas6yOOKGhhDHhl_glBoKCYGV2d2KY-_XTLfKinbNKfsvGYayihU1KkOfSs6oolvleZNVnMIedw4Yd6oFvWSymUmGsMzQ75w6ZVOn_4i-yx1W5OQHasuQXA |
| ContentType | Journal Article |
| Copyright | 2018 日本地質学会 Copyright Japan Science and Technology Agency 2018 |
| Copyright_xml | – notice: 2018 日本地質学会 – notice: Copyright Japan Science and Technology Agency 2018 |
| DBID | F1W H96 L.G |
| DOI | 10.5575/geosoc.2017.0080 |
| DatabaseName | ASFA: Aquatic Sciences and Fisheries Abstracts Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources Aquatic Science & Fisheries Abstracts (ASFA) Professional |
| DatabaseTitle | Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources Aquatic Science & Fisheries Abstracts (ASFA) Professional ASFA: Aquatic Sciences and Fisheries Abstracts |
| DatabaseTitleList | Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources |
| DeliveryMethod | fulltext_linktorsrc |
| Discipline | Geology |
| EISSN | 1349-9963 |
| EndPage | 76 |
| ExternalDocumentID | article_geosoc_124_1_124_2017_0080_article_char_ja |
| GroupedDBID | 29B 2WC 5GY ALMA_UNASSIGNED_HOLDINGS BBORY E3Z JSF KQ8 OK1 P2P RJT RNS XSB ~02 F1W H96 L.G |
| ID | FETCH-LOGICAL-j2160-fbc1364f0ddf1a322e8552d16d057a8d24f2a229937bffa1ad911a2df0da66d53 |
| ISSN | 0016-7630 |
| IngestDate | Fri Sep 13 02:32:34 EDT 2024 Thu Aug 17 20:30:53 EDT 2023 |
| IsDoiOpenAccess | true |
| IsOpenAccess | true |
| IsPeerReviewed | false |
| IsScholarly | true |
| Issue | 1 |
| Language | Japanese |
| LinkModel | OpenURL |
| MergedId | FETCHMERGED-LOGICAL-j2160-fbc1364f0ddf1a322e8552d16d057a8d24f2a229937bffa1ad911a2df0da66d53 |
| OpenAccessLink | https://www.jstage.jst.go.jp/article/geosoc/124/1/124_2017.0080/_article/-char/ja |
| PQID | 2047257840 |
| PQPubID | 2029105 |
| PageCount | 10 |
| ParticipantIDs | proquest_journals_2047257840 jstage_primary_article_geosoc_124_1_124_2017_0080_article_char_ja |
| PublicationCentury | 2000 |
| PublicationDate | 2018/01/15 |
| PublicationDateYYYYMMDD | 2018-01-15 |
| PublicationDate_xml | – month: 01 year: 2018 text: 2018/01/15 day: 15 |
| PublicationDecade | 2010 |
| PublicationPlace | Tokyo |
| PublicationPlace_xml | – name: Tokyo |
| PublicationTitle | Chishitsugaku zasshi |
| PublicationTitleAlternate | 地質雑 |
| PublicationYear | 2018 |
| Publisher | 一般社団法人 日本地質学会 Japan Science and Technology Agency |
| Publisher_xml | – name: 一般社団法人 日本地質学会 – name: Japan Science and Technology Agency |
| References | Ikari, M. J., Kameda, J., Saffer, D. M. and Kopf, A. J., 2015b, Strength characteristics of Japan Trench borehole samples in the high-slip region of the 2011 Tohoku-Oki earthquake. Earth Planet. Sci. Lett., 412, 34–41. Ujiie, K., Inoue, T. and Ishiwata, J., 2016, High-velocity frictional strength across the Tohoku-Oki megathrust determined from surface drilling torque. Geophys. Res. Lett., 43, 2488–2493. 林, 為人・斎藤実篤・モリ ジェームズ・江口暢久・Sean TOCZKO（Lin, W., Saito S., Mori, J., Eguchi, N. and Toczko, S.）, 2014, 東北地方太平洋沖地震調査掘削（JFAST）の概要とこれまでの主な成果（Summary of the Japan Trench Fast Drilling Project（JFAST）and its Main Achievements）．応用地質（Jour. Japan. Soc. Eng. Geol.）, 55, 241–250 Argus, D. F., Gordon, R. G. and DeMets, C., 2011, Geologically current motion of 56 plates relative to the no-net-rotation reference frame. Geochem. Geophys. Geosyst., 12, Q11001, doi: 10.1029/2011GC003751. Ujiie, K., Tanaka, H., Saito, T., Tsutsumi, A., Mori, J. J., Kameda, J.,…Expedition 343 and 343T Scientists, 2013, Low coseismic shear stress on the Tohoku-Oki megathrust determined from laboratory experiments. Science 342, 1211–1214. Fujiwara, T., Kodaira, S., No, T., Kaiho, Y., Takahashi, N. and Kaneda, Y., 2011, The 2011 Tohoku-Oki earthquake: Displacement reaching the trench axis. Science, 334, 1240, doi: 10.1126/science.1211554. Sawai, M., Hirose, T. and Kameda, J., 2014, Frictional properties of incoming pelagic sediments at the Japan Trench: Implications for large slip at a shallow plate boundary during the 2011 Tohoku earthquake. Earth Planet. Space, 66, 65. ［URL1］消防庁（Fire and Disaster Management Agency）, 2017, 平成23年（2011年）東北地方太平洋沖地震（東日本大震災）について．http://www.fdma.go.jp/bn/higaihou/pdf/jishin/155.pdf Lin, W., Saito, S., Sanada, Y., Yamamoto, Y., Hashimoto, Y. and Kanamatsu, T., 2011, Principal horizontal stress orientations prior to the 2011 Mw 9.0 Tohoku-Oki, Japan, earthquake in its source area. Geophys. Res. Lett., 38, L00G10, http://dx.doi.org/10.1029/2011GL049097. Kameda, J., Shimizu, M., Ujiie, K., Hirose, T., Ikari, M., Mori, J.,…Kimura, G., 2015, Pelagic smectite as an important factor in tsunamigenic slip along the Japan Trench. Geology, 43, 155–158. Scholz, C. H., 1998, Earthquakes and friction laws. Nature, 391, 37–42. Wang, K. and Hu, Y., 2006, Accretionary prisms in subduction earthquake cycles: The theory of dynamic Coulomb wedge. Jour. Geophy. Res., 111, B06410, doi: 10.1029/2005JB004094. Ujiie, K. and Kimura, G., 2014, Earthquake faulting in subduction zones: insights from fault rocks in accretionary prisms. Prog. Earth Planet. Sci. 1, doi: 10.1186/2197-4284-1-7. Fulton, P. M., Brodsky, E. E., Kano, Y., Mori, J., Chester, F., Ishikawa, T.,…Exp. 343/343T and KR13-08 Scientists, 2013, Low Coseismic Friction on the Tohoku-oki Fault Determined from Temperature Measurements. Science, 342, 1215–1217. Kanamori, H., Miyazawa, M. and Mori, J., 2006, Investigation of the earthquake sequence off Miyagi prefecture with historical seismograms. Earth Planets Space, 58, 1533–1541. Lin, W., Conin, M., Moore, J. C., Chester, F. M., Nakamura, Y., Mori, J. J.,…Expedition 343 Scientists, 2013, Stress state in the largest displacement area of the 2011 Tohoku-Oki earthquake. Science, 339, 687–690. Ikari, M. J., Ito, Y., Ujiie, K. and Kopf, A. J., 2015a, Spectrum of slip behavior in Tohoku fault zone samples at plate tectonic slip rates. Nat. Geosci., 8, 870–874. Tanikawa, W., Hirose, T., Mukoyoshi, H., Tadai, O. and Lin, W., 2013, Fluid transport properties in sediments and their role in large slip near the surface of the plate boundary fault in the Japan Trench. Earth Planet. Sci. Lett., 382, 150–160. Bilek, S. L. and Lay, T., 2002, Tsunami earthquakes possibly widespread manifestations of frictional conditional stability. Geophys. Res. Lett., 29, doi: 10.1029/2002GL015215. Ito, Y., Tsuji, T., Osada, Y., Kido, M., Inazu, D., Hayashi, Y.,…Fujimoto, H., 2011, Frontal wedge deformation near the source region of the 2011 Tohoku-Oki earthquake. Geophys. Res. Lett., 38, L00G05, doi: 10.1029/2011GL048355. Ito, Y., Hino, R., Kido, M., Fujimoto, H., Osada, Y., Inazu, D.,…Ashi, J., 2013, Episodic slow slip events in the Japan subduction zone before the 2011 Tohoku-Oki earthquake. Tectonophysics, 600, 14–26. Ide, S., Baltay, A. and Beroza, G. C., 2011, Shallow dynamic overshoot and energetic deep rupture in the 2011 Mw 9.0 Tohoku-Oki earthquake. Science, 332, 1426–1429. Expedition 343/343T Scientists, 2013, Site C0019. In Chester, F., er al, eds., Proc, IODP, 343, Integrated Ocean Drilling Program Management International, Inc., Tokyo, 117p. Yang T., Mishima, T., Ujiie, K., Chester, F. M., Mori, J. J., Eguchi, N.,…Expedition 343 Scientists, 2013, Strain decoupling across the décollement in the region of large slip during the 2011 Tohoku-Oki earthquake from anisotropy of magnetic susceptibility. Earth Planet. Sci. Lett., 381, 31–38. Chester, F. M., Mori, J., Eguchi, N., Toczko, S. and the Expedition 343/343T Scientists, 2013a, Japan Trench Fast Earthquake Drilling Project（JFAST）. Proc. IODP, 343/343T, Integrated Ocean Drilling Program Management International, Inc., College Station, Tex., doi: 10.2204/iodp.proc.343343T2013. Chester, F. M., Rowe, C., Ujiie, K., Kirkpatrick, J., Regalla, C., Remitti, F.,…Expedition 343 and 343T Scientists, 2013b, Structure and composition of the plate-boundary slip zone for the 2011 Tohoku-Oki earthquake. Science, 342, 1208-1211, doi: 10.1126/science.1243719. Kirkpatrick, J. D., Rowe, C. D., Ujiie, K., Moore, J. C., Regalla, C., Remitti, F.,…Chester, F. M., 2015, Structure and lithology of the Japan Trench subduction plate boundary fault. Tectonics, 34, doi: 10.1002/2014TC003695. |
| References_xml | |
| SSID | ssib000936372 ssib020472797 ssib023160021 ssib002484403 ssib008477520 ssib002223896 ssib025654070 ssib000961579 ssib003171056 ssib003115821 ssj0041208 |
| Score | 2.135879 |
| Snippet | ... The first offshore ‘rapid response drilling,’ a drilling immediately after an earthquake for a scientific purpose, was conducted at the Japan Trench after the... |
| SourceID | proquest jstage |
| SourceType | Aggregation Database Publisher |
| StartPage | 67 |
| SubjectTerms | 2011 Tohoku Earthquake Chikyu Clay Clay minerals Drilling Earthquakes Expeditions fault zone Fault zones Friction Ocean floor ODP Offshore Physical properties scientific drilling Seismic activity Smectites stress |
| Title | 東北地方太平洋沖地震後の緊急調査掘削（IODP第343次航海：J-FAST）の成果 |
| URI | https://www.jstage.jst.go.jp/article/geosoc/124/1/124_2017.0080/_article/-char/ja https://www.proquest.com/docview/2047257840/abstract/ |
| Volume | 124 |
| hasFullText | 1 |
| inHoldings | 1 |
| isFullTextHit | |
| isPrint | |
| ispartofPNX | 地質学雑誌, 2018/01/15, Vol.124(1), pp.67-76 |
| link | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwnV3NT9RAFG8QYuLF-BlRNByci6Ta706P7dIVEcHoEuHUzG5bdtfAGtg9yElPAhLjCY1BjYleCDF-hhCJ_jFmC574F3xvZndb0Bg1Ic3sdN7r8N7MvN_rzHuVpPNxFGug9pKsl0qWbJhqKFPHYrLNYtVhURhHPOPNtVFraNwYnjAnug5cyJxaatSLF0vzv40r-R-tQh3oFaNk_0GzHaZQAWXQL1xBw3D9Kx0T3yLOIPFU4puE5ohjY8HJEU_htyziOVjjGsR1sQA_PR1veQAhPV7QsFlK5WCBcj6ejzx9HcAmcX3i28SzCXWRiirENYlPka2X58_KE48zpD5xKO-PwxtDPTCkV8YGryMLNwd_usE7gWUVuVDOCHtj4jMEjeMOy3n3ZqHNwsl0xUISR_yT8LxcFmLnyvharT7XmGK3GwPz4ByUK521jU2zkMPlSTbXKFdma50BVxMh98OV6XbVeLUiNm-u1sp1ljYdEWkXbkWVdhxd662Jigf2ZBE3KiwaIJF0-cQtinQnY8DlUa9Zq6FaMqzDYv8oEoZCNxwZfEV9jyUR4eB7poywC-KTI_vNlQlYGcbYVFSDmYjHDDGdJlVS09w-jjA6FuTHR0aCgj9ROCD1wOwy7W6px_PGbkxm301ZevZbAA6g1cweLCJBmkmuqBnUyCZjxLxL2ahpQJYAvtP2gGNsM3UuNMwzaqd70OAo4B5vhx6wNCZ3VNq4yFA1pYWLhDTFoQGUwaX9EgA4WAXnaOpXhMRhX-GIdLjlr_W7YvIdlbqq7Jh08DL_Hvbd4xJLnr9vLj9prr5LVjabr9eamx-TTw-TDytQ82P1QfPr8vf7b7c3lpJ7b3bWviUvvySPnjYXl3a3FnBCbK-vw1RI1l_tLKwlnzd2t56JIb-7tQhkycLj5MXqCWk87xdyQ3LrqyVyVQMJyHGxpOqWESthGKsM7GVETVMLVSsE14jRUDNijWka-gXFOGYqCwFvMC0EAmZZoamflLpnajPRKakfKCxbLSoGi4qGo-i0qOhxCbihVxBZpV7JFWIK7ojUNEFrKQqEQAMYkIHKryjaAEXbaYJRnUGV9Up9bQkHraVtLuC6BVtuKKf_fPuMdCidXX1Sd322EZ0FlF4vnmsNz5-hHdQO |
| link.rule.ids | 315,786,790,27957,27958 |
| linkProvider | American Geosciences Institute |
| openUrl | ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=%E6%9D%B1%E5%8C%97%E5%9C%B0%E6%96%B9%E5%A4%AA%E5%B9%B3%E6%B4%8B%E6%B2%96%E5%9C%B0%E9%9C%87%E5%BE%8C%E3%81%AE%E7%B7%8A%E6%80%A5%E8%AA%BF%E6%9F%BB%E6%8E%98%E5%89%8A%EF%BC%88IODP%E7%AC%AC343%E6%AC%A1%E8%88%AA%E6%B5%B7%EF%BC%9AJ-FAST%EF%BC%89%E3%81%AE%E6%88%90%E6%9E%9C&rft.jtitle=Chishitsugaku+zasshi&rft.au=Yamada%2C+Yasuhiro&rft.au=Mori%2C+Jim&rft.au=Ujiie%2C+Kohtaro&rft.au=Lin%2C+Weiren&rft.date=2018-01-15&rft.pub=Japan+Science+and+Technology+Agency&rft.issn=0016-7630&rft.eissn=1349-9963&rft.volume=124&rft.issue=1&rft.spage=67&rft_id=info:doi/10.5575%2Fgeosoc.2017.0080&rft.externalDBID=NO_FULL_TEXT |
| thumbnail_l | http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/lc.gif&issn=0016-7630&client=summon |
| thumbnail_m | http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/mc.gif&issn=0016-7630&client=summon |
| thumbnail_s | http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/sc.gif&issn=0016-7630&client=summon |