Fault weakening caused by smectite swelling

• 資料種別: 記事
• タイトル: Fault weakening caused by smectite swelling
• 著者・編者: Jun Kameda; Masaoki Uno; Marianne Conin
• 出版事項: 日本 : Springer Nature
• 出版年月日等: 2019-12-02
• 出版年（W3CDTF）: 2019-12-02
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 71(131)
• 掲載巻: 71(131)
• ISSN（掲載誌）: 1880-5981
• ISSN-L（掲載誌）: 1343-8832
• 本文の言語コード: eng
• DOI: 10.1186/s40623-019-1108-5; https://doi.org/10.1186/s40623-019-1108-5
• 国立国会図書館永続的識別子: info:ndljp/pid/11467676; https://dl.ndl.go.jp/pid/11467676
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• 受理日（W3CDTF）: 2020-03-23T18:58:42+09:00
• 保存日（W3CDTF）: 2020-03-23
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• 連携機関・データベース: 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

• 要約等: The large slip along the shallow subduction interface during the 2011 Tohoku-Oki earthquake (Mw9.0) caused a huge tsunami that struck the northeast coast of Honshu, Japan. The Integrated Ocean Drilling Program Expedition 343 JFAST program revealed that the fault zone is composed primarily of smectite. Our swelling experiments using the fault material demonstrated that the swelling pressure systematically increases with a decrease in sample porosity. Based on in situ porosity estimations in the IODP borehole, the swelling pressure of the fault is as high as 8 MPa, which is comparable to the effective normal stress at the drill site (~ 7 MPa). This also suggests that the modified effective confining pressure of the fault is quite low or potentially zero, meaning that fault strength is governed mainly by cohesion rather than frictional strength. The fault may therefore be intrinsically weak, which could enhance the coseismic displacement toward the trench when earthquake slip propagates from depth.
• DOI: 10.1186/s40623-019-1108-5; https://doi.org/10.1186/s40623-019-1108-5
• オンライン閲覧公開範囲: インターネット公開
• 著作権情報: © The Author(s) 2019.; This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creat iveco mmons .org/licen ses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
• 関連情報: Fault weakening caused by smectite swelling; https://cir.nii.ac.jp/crid/2120307890029253120
• 関連情報（URI）: http://hdl.handle.net/2241/0002001554; https://tsukuba.repo.nii.ac.jp/records/2001554; http://id.ndl.go.jp/digimeta/11467676; https://dl.ndl.go.jp/pid/11467676; http://link.springer.com/content/pdf/10.1186/s40623-019-1108-5.pdf; http://link.springer.com/article/10.1186/s40623-019-1108-5/fulltext.html; http://hdl.handle.net/2115/79608
• 参照: Cohesional Slip on a Plate Subduction Boundary During a Large Earthquake; https://cir.nii.ac.jp/crid/1050025031474806912; Abrupt water temperature increases near seafloor during the 2011 Tohoku earthquake; https://cir.nii.ac.jp/crid/1360016870443278592; Stick-slip behavior of a clayey crustal fault; https://cir.nii.ac.jp/crid/1360298337112216320; Volatile-consuming reactions fracture rocks and self-accelerate fluid flow in the lithosphere; https://cir.nii.ac.jp/crid/1360576118691542528; Surface Physicochemical Properties of Smectite‐Rich Fault Gouge: A Case Study of the Japan Trench Plate‐Boundary Fault; https://cir.nii.ac.jp/crid/1360584341823557120; Special issue "Crustal dynamics : toward integrated view of island arc seismogenesis; https://cir.nii.ac.jp/crid/2050870367078659712
• 参照: Exchangeable cation composition of the smectite‐rich plate boundary fault at the Japan Trench; https://cir.nii.ac.jp/crid/1050869456408281216; Low Coseismic Shear Stress on the Tohoku-Oki Megathrust Determined from Laboratory Experiments; https://cir.nii.ac.jp/crid/1360002218438847488; Structure and Composition of the Plate-Boundary Slip Zone for the 2011 Tohoku-Oki Earthquake; https://cir.nii.ac.jp/crid/1360002218438851584; Pelagic smectite as an important factor in tsunamigenic slip along the Japan Trench; https://cir.nii.ac.jp/crid/1360004236002473216; Coseismic fault rupture at the trench axis during the 2011 Tohoku-oki earthquake; https://cir.nii.ac.jp/crid/1360283691783878144; The 2011 Tohoku-Oki Earthquake: Displacement Reaching the Trench Axis; https://cir.nii.ac.jp/crid/1360283693415157376; Low Coseismic Friction on the Tohoku-Oki Fault Determined from Temperature Measurements; https://cir.nii.ac.jp/crid/1360283693415558272; Swelling characteristics of bentonites in artificial seawater; https://cir.nii.ac.jp/crid/1360285711098149504; Abundance of smectite and the location of a plate-boundary fault, Barbados accretionary prism; https://cir.nii.ac.jp/crid/1360292617912394496; Laboratory results indicating complex and potentially unstable frictional behavior of smectite clay; https://cir.nii.ac.jp/crid/1360292619225396352; Clay gouge; https://cir.nii.ac.jp/crid/1360292621336184704; Shallow Dynamic Overshoot and Energetic Deep Rupture in the 2011 <i>M</i> _w 9.0 Tohoku-Oki Earthquake; https://cir.nii.ac.jp/crid/1360565168391795456; Silica diagenesis and its effect on interplate seismicity in cold subduction zones; https://cir.nii.ac.jp/crid/1360567182088656640; Swelling pressure and microstructure of an activated swelling clay with temperature; https://cir.nii.ac.jp/crid/1360574093588903936; Runaway slip to the trench due to rupture of highly pressurized megathrust beneath the middle trench slope: The tsunamigenesis of the 2011 Tohoku earthquake off the east coast of northern Japan; https://cir.nii.ac.jp/crid/1360848657065384320; Smectite swelling in the Miura–Boso accretionary prism: Possible cause for incipient décollement zone formation; https://cir.nii.ac.jp/crid/1360848657453422720; Structural and physical property characterization in the Wenchuan earthquake Fault Scientific Drilling project — hole 1 (WFSD-1); https://cir.nii.ac.jp/crid/1360855569168834432; 11. Friction of the Smectite Clay Montmorillonite; https://cir.nii.ac.jp/crid/1361137044241792128; Fracture porosity in the décollement zone of Nankai accretionary wedge using Logging While Drilling resistivity data; https://cir.nii.ac.jp/crid/1361137044350244224; Core-log integration studies in hole-A of Taiwan Chelungpu-fault Drilling Project; https://cir.nii.ac.jp/crid/1361418520373500544; Effect of hydration state on the frictional properties of montmorillonite‐based fault gouge; https://cir.nii.ac.jp/crid/1362262943463419264; Analysis of the validity of the Gouy-Chapman theory of the electric double layer; https://cir.nii.ac.jp/crid/1362262943611338624; Frictional dependence of gouge mixtures of quartz and montmorillonite on velocity, composition and fabric; https://cir.nii.ac.jp/crid/1362262944467505152; Physical Properties Handbook: A Guide to the Shipboard Measurement of Physical Properties of Deep-Sea Cores; https://cir.nii.ac.jp/crid/1362262944487457536; Distribution of resistive and conductive structures in Nankai accretionary wedge reveals contrasting stress paths; https://cir.nii.ac.jp/crid/1362262945441899008; Swelling pressures of compacted bentonites from diffuse double layer theory; https://cir.nii.ac.jp/crid/1363388844500345984; Strength of stick-slip and creeping subduction megathrusts from heat flow observations; https://cir.nii.ac.jp/crid/1363388844564015488; High heat flow anomalies on an old oceanic plate observed seaward of the Japan Trench; https://cir.nii.ac.jp/crid/1363388845270751744; Response of natural smectite to seismogenic heating and potential implications for the 2011 Tohoku earthquake in the Japan Trench; https://cir.nii.ac.jp/crid/1363670321334739584; A Modified Shear Strength Formulation for Swelling Clay Soils; https://cir.nii.ac.jp/crid/1364233268484785024; Geothermal gradient and heat flow data in and around Japan (I): apprasial of heat flow from geothermal gradient data; https://cir.nii.ac.jp/crid/1390001206512574208; Tsunami source of the 2011 off the Pacific coast of Tohoku Earthquake; https://cir.nii.ac.jp/crid/2051714792045167232
• 参照（URI）: https://cir.nii.ac.jp/crid/1370286996886110597; https://cir.nii.ac.jp/crid/1370286996886110724
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: 学術機関リポジトリデータベース; https://irdb.nii.ac.jp; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org; CiNii Articles; 科学研究費助成事業データベース; https://kaken.nii.ac.jp/ja
• 書誌ID（NDLBibID）: 11467676; http://id.ndl.go.jp/bib/11467676
• NII論文ID: 120007163375