{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360011142936799744.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/ggge.20156"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fggge.20156"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/ggge.20156"}}],"dc:title":[{"@value":"Shear strength of sediments approaching subduction in the Nankai Trough, Japan as constraints on forearc mechanics"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The mechanical behavior of the plate boundary fault zone is of paramount importance in subduction zones, because it controls megathrust earthquake nucleation and propagation as well as the structural style of the forearc. In the Nankai area along the NanTroSEIZE (Kumano) drilling transect offshore SW Japan, a heterogeneous sedimentary sequence overlying the oceanic crust enters the subduction zone. In order to predict how variations in lithology, and thus mechanical properties, affect the formation and evolution of the plate boundary fault, we conducted laboratory tests measuring the shear strengths of sediments approaching the trench covering each major lithological sedimentary unit. We observe that shear strength increases nonlinearly with depth, such that the (apparent) coefficient of friction decreases. In combination with a critical taper analysis, the results imply that the plate boundary position is located on the main frontal thrust. Further landward, the plate boundary is expected to step down into progressively lower stratigraphic units, assisted by moderately elevated pore pressures. As seismogenic depths are approached, the décollement may further step down to lower volcaniclastic or pelagic strata but this requires specific overpressure conditions. High‐taper angle and elevated strengths in the toe region may be local features restricted to the Kumano transect.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380011142936799746","@type":"Researcher","foaf:name":[{"@value":"Matt J. Ikari"}],"jpcoar:affiliationName":[{"@value":"MARUM, Center for Marine Environmental Sciences University of Bremen Bremen Germany"}]},{"@id":"https://cir.nii.ac.jp/crid/1380011142936799744","@type":"Researcher","foaf:name":[{"@value":"Andre Hüpers"}],"jpcoar:affiliationName":[{"@value":"MARUM, Center for Marine Environmental Sciences University of Bremen Bremen Germany"}]},{"@id":"https://cir.nii.ac.jp/crid/1380011142936799745","@type":"Researcher","foaf:name":[{"@value":"Achim J. Kopf"}],"jpcoar:affiliationName":[{"@value":"MARUM, Center for Marine Environmental Sciences University of Bremen Bremen Germany"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"15252027"},{"@type":"EISSN","@value":"15252027"}],"prism:publicationName":[{"@value":"Geochemistry, Geophysics, Geosystems"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2013-08","prism:volume":"14","prism:number":"8","prism:startingPage":"2716","prism:endingPage":"2730"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fggge.20156"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/ggge.20156"}],"createdAt":"2013-05-03","modifiedAt":"2023-10-30","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050001202560213760","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Spectrum of slip behaviour in Tohoku fault zone samples at plate tectonic slip rates"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004232135395328","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Strength characteristics of Japan Trench borehole samples in the high-slip region of the 2011 Tohoku-Oki earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360584340507043712","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Frictional properties of the décollement in the shallow Nankai Trough: Constraints from friction experiments simulating in-situ conditions and implications for the seismogenic zone"}]},{"@id":"https://cir.nii.ac.jp/crid/1360584341816281856","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A review of shallow slow earthquakes along the Nankai Trough"}]},{"@id":"https://cir.nii.ac.jp/crid/1360854882786727936","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Heterogeneous Sediment Input at the Nankai Trough Subduction Zone: Implications for Shallow Slow Earthquake Localization"}]},{"@id":"https://cir.nii.ac.jp/crid/1360861707357240576","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Spatial Patterns in Frictional Behavior of Sediments Along the Kumano Transect in the Nankai Trough"}]},{"@id":"https://cir.nii.ac.jp/crid/1390869390127994496","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"南海トラフにおける浅部スロー地震域の地質構造と摩擦特性"},{"@language":"en","@value":"Geological Structure and Frictional Properties around Source Regions of Slow Earthquakes at the Shallow Plate Interface in the Nankai Trough"},{"@language":"ja-Kana","@value":"ナンカイ トラフ ニ オケル センブ スロー ジシンイキ ノ チシツ コウゾウ ト マサツ トクセイ"}]},{"@id":"https://cir.nii.ac.jp/crid/2050307417130254336","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Depth profile of frictional properties in the inner Nankai accretionary prism using cuttings from IODP Site C0002"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1002/ggge.20156"},{"@type":"CROSSREF","@value":"10.4294/zisin.2025-3_references_DOI_WkGNQ3Sjlh6wkGcWlxEU20iXK5W"},{"@type":"CROSSREF","@value":"10.1038/ngeo2547_references_DOI_WkGNQ3Sjlh6wkGcWlxEU20iXK5W"},{"@type":"CROSSREF","@value":"10.1016/j.epsl.2014.12.014_references_DOI_WkGNQ3Sjlh6wkGcWlxEU20iXK5W"},{"@type":"CROSSREF","@value":"10.1186/s40645-022-00488-1_references_DOI_WkGNQ3Sjlh6wkGcWlxEU20iXK5W"},{"@type":"CROSSREF","@value":"10.1016/j.epsl.2023.118357_references_DOI_WkGNQ3Sjlh6wkGcWlxEU20iXK5W"},{"@type":"CROSSREF","@value":"10.1186/s40623-023-01920-6_references_DOI_WkGNQ3Sjlh6wkGcWlxEU20iXK5W"},{"@type":"CROSSREF","@value":"10.1029/2021gc009965_references_DOI_WkGNQ3Sjlh6wkGcWlxEU20iXK5W"},{"@type":"CROSSREF","@value":"10.1029/2021jb022546_references_DOI_WkGNQ3Sjlh6wkGcWlxEU20iXK5W"}]}