Geometrical dependence on the stress and slip tendency acting on the subduction megathrust of the Nankai seismogenic zone off Kumano
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- 資料種別
- 記事
- 著者・編者
- Masataka KinoshitaKazuya ShiraishiEvi Demetriou
- 出版年月日等
- 2019-01-23
- 出版年（W3CDTF）
- 2019-01-23
- タイトル（掲載誌）
- Progress in earth and planetary science
- 巻号年月日等（掲載誌）
- 6(7)
- 掲載巻
- 6(7)
- ISSN（掲載誌）
- 2197-4284
- ISSN-L（掲載誌）
- 2197-4284
- 本文の言語コード
- eng
- DOI
- 10.1186/s40645-018-0253-y
- 国立国会図書館永続的識別子
- info:ndljp/pid/11249495
- コレクション（共通）
- コレクション（障害者向け資料：レベル1）
- コレクション（個別）
- 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他
- 収集根拠
- オンライン資料収集制度
- 受理日（W3CDTF）
- 2019-03-05T23:10:26+09:00
- 保存日（W3CDTF）
- 2019-03-05
- 記録形式（IMT）
- application/pdf
- オンライン閲覧公開範囲
- 国立国会図書館内限定公開
- デジタル化資料送信
- 図書館・個人送信対象外
- 遠隔複写可否（NDL）
- 可
- 掲載誌（国立国会図書館永続的識別子）
- info:ndljp/pid/11249488
- 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
- 要約等
- We assess the dependence of megathrust geometry near the updip edge of the Nankai seismogenic zone according to the slip tendency of the megathrust based on a reprocessed 3D PSDM seismic volume image and International Ocean Discovery Program (IODP) NanTroSEIZE drilling data off the coast of the Kii Peninsula, central Japan. The plate boundary fault surface is manually picked from the 3D seismic volume and is divided into three groups: low dip (10°–15°) trending NW to N in the NE region, intermediate dip (~ 25°) trending north in the western region, and high dip (30°–40°) trending NW in the SE corner. We then calculate the overburden (Sv) by converting the modeled 3D velocity to bulk density. Here, Sv ranges from 100 MPa near the SW edge to 160 MPa on the NE corner. In order to derive horizontal principal stresses (SH and Sh) and the pore fluid pressure (Pp), we assign the ratio of horizontal-to-vertical principal stresses, r (= SH/Sv), and the ratio of pore fluid pressure-to-vertical stress, λ (= Pp/Sv) based on IODP drilling data. The directions of SH and the slip on the fault are set parallel to the plate convergence vector (N55W). Assuming a triaxial condition (SH > Sh = Sv), the slip tendency (Ts) can be calculated from the dip angle and dip azimuth of the fault surface, r, and λ. We found that Ts is sensitive to the variation in fault geometry. For r = 1.2 and λ = 0.7 (normalized pore pressure ratio λ* = 0.25), Ts is low (~ 0.1) in the low-angle dip region and higher (> 0.2) in the high-angle dip region. This suggests that the high-angle fault is optimally oriented under this condition. Low Ts in the low-angle dip region would correspond to a weaker region due to a low frictional strength, assuming that the fault surface should slip simultaneously. Using the high pore pressure ratio (λ* ~ 0.85) beneath the fault zone, the fault beneath IODP Site C0002 is very close to failure if r > 1.2.
- DOI
- 10.1186/s40645-018-0253-y
- 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, 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
- Additional file 1: of Geometrical dependence on the stress and slip tendency acting on the subduction megathrust of the Nankai seismogenic zone off Kumano
- 関連情報（URI）
- 参照
- Seismogenic Zone Structures Revealed by Improved 3‐D Seismic Images in the Nankai Trough off KumanoHigh-spatial-resolution slip tendency modeling based on 3D seismic data to assess induced earthquake potential and identify suitable CO2 storage sites
- 参照
- Three-dimensional seismic velocity structure and configuration of the Philippine Sea slab in southwestern Japan estimated by double-difference tomographyConnecting slow earthquakes to large earthquakesSubduction of the Philippine Sea plate beneath southwestern Japan: Slab geometry and its relationship to arc magmatismMiddle Miocene swift migration of the TTT triple junction and rapid crustal growth in southwest Japan: A reviewIdentification of the static backstop and its influence on the evolution of the accretionary prism in the Nankai TroughLow Coseismic Shear Stress on the Tohoku-Oki Megathrust Determined from Laboratory ExperimentsNear‐field observations of an offshore <i>M<sub>w</sub></i> 6.0 earthquake from an integrated seafloor and subseafloor monitoring network at the Nankai Trough, southwest JapanSeafloor geodetic constraints on interplate coupling of the Nankai Trough megathrust zoneA cause of rupture segmentation and synchronization in the Nankai trough revealed by seismic imaging and numerical simulationDetermination of the pore fluid pressure ratio at seismogenic megathrusts in subduction zones: Implications for strength of asperities and Andean‐type mountain buildingThree-Dimensional Splay Fault Geometry and Implications for Tsunami GenerationCRITICAL TAPER MODEL OF FOLD-AND-THRUST BELTS AND ACCRETIONARY WEDGESAccretionary prisms in subduction earthquake cycles: The theory of dynamic Coulomb wedgeDetailed structural image around splay‐fault branching in the Nankai subduction seismogenic zone: Results from a high‐density ocean bottom seismic surveyStress constraints and hydrofracturing stress data for the continental crustExpedition 365 preliminary report: NanTroSEIZE stage 3: shallow megasplay long-term borehole monitoring system (LTBMS) (international ocean discovery program)NanTroSEIZE Stage 1 Expeditions 314, 315, and 316: First Drilling Proram of the Nankai Trough Seismogenic Zone ExperimentSubducted Seamount Imaged in the Rupture Zone of the 1946 Nankaido EarthquakeNanTroSEIZE Stage 1Crustal velocity field of southwest Japan: Subduction and arc‐arc collisionTsunamigenic potential of the shallow subduction plate boundary inferred from slow seismic slipA low-velocity zone with weak reflectivity along the Nankai subduction zoneIn Situ Stress and Pore Pressure in the Deep Interior of the Nankai Accretionary Prism, Integrated Ocean Drilling Program Site C0002Interseismic stress accumulation at the locked zone of Nankai Trough seismogenic fault off Kii PeninsulaVery‐low‐frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prismGeologically current plate motionsReservoir GeomechanicsSpatial and temporal evolution of the megasplay fault in the Nankai TroughWaveform tomography imaging of a megasplay fault system in the seismogenic Nankai subduction zoneRecurring and triggered slow-slip events near the trench at the Nankai Trough subduction megathrustNanTroSEIZE Stage 3: NanTroSEIZE Plate Boundary Deep Riser 2NanTroSEIZE: The IODP Nankai Trough Seismogenic Zone ExperimentSeismic structure off the Kii Peninsula, Japan, deduced from passive- and active-source seismographic dataOff‐fault plasticity and earthquake rupture dynamics: 1. Dry materials or neglect of fluid pressure changesExpedition 316 summaryVelocity‐porosity relationships for water‐saturated siliciclastic sedimentsRupture process of the 1944 Tonankai earthquake (<i>M</i><sub><i>s</i></sub> 8.1) from the inversion of teleseismic and regional seismogramsSlip-tendency analysis and fault reactivationThe slip distribution of the 1946 Nankai earthquake estimated from tsunami inversion using a new plate modelSite C0010Trends in relationships between measured in-situ stresses and depthSeismogenic Processes Revealed Through the Nankai Trough Seismogenic Zone ExperimentsSubduction ZonesHigh precision slip distribution of the 1944 Tonankai earthquake inferred from tsunami waveforms: Possible slip on a splay faultFriction of rocksReactivation tendency analysis: A theory for predicting the temporal evolution of preexisting weakness under uniform stress stateImplications of fault-valve behaviour for rupture nucleation and recurrenceSite C0002Pore pressure distribution of a mega-splay fault system in the Nankai Trough subduction zone: Insight into up-dip extent of the seismogenic zoneフィリピン海プレートが支配する日本列島のテクトニクスVery low frequency earthquakes excited by the 2004 off Kii peninsula earthquakes: a dynamic deformation process in the large accretionary prismSource rupture process of the 1944 Tonankai earthquake and the 1945 Mikawa earthquake derived from low-gain seismogramsAPPLICABILITY OF SLIP TENDENCY FOR UNDERSTANDING LONG-TERM FAULT ACTIVITY: A CASE STUDY OF ACTIVE FAULTS IN NORTHEASTERN JAPANLow‐frequency tremors associated with reverse faults in a shallow accretionary prismNearly complete stress drop in the 2011 Mw 9.0 off the Pacific coast of Tohoku Earthquake
- 参照（URI）
- 連携機関・データベース
- 国立情報学研究所 : CiNii Research
- 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雑誌記事索引データベースCrossrefCiNii Articles科学研究費助成事業データベース科学研究費助成事業データベース科学研究費助成事業データベース科学研究費助成事業データベース科学研究費助成事業データベースCrossrefCrossref
- 書誌ID（NDLBibID）
- 11249495
- NII論文ID
- 120007149007