{"@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/1361418520445508992.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2001jb000262"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2001JB000262"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2001JB000262"}}],"dc:title":[{"@value":"A deep strong reflector in the Nankai accretionary wedge from multichannel seismic data: Implications for underplating and interseismic shear stress release"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>We present the results of structural and stratigraphic interpretations for the multichannel seismic profiles to reveal the structure of the Nankai accretionary wedge off Shikoku Island. On the basis of reflection characteristics we identify three major seismic units that correspond to a unit consisting of both Oligocene‐Miocene accretionary prism and the sedimentary cover (unit A), a unit of underthrust Miocene‐Pliocene hemipelagic sediments (unit B), and a unit of subducting pre‐Miocene oceanic crustal rocks (unit C). According to relative strength of the topmost reflector of unit B the Nankai accretionary wedge can be divided into three different structural zones along the cross‐strike direction: apparent décollement reflector zone, low‐amplitude reflector (LAR) zone, and deep strong reflector (DSR) zone. Despite the velocity uncertainty involved in the depth conversion and therefore thickness estimation error, the décollement step‐down and the possible duplex structures in the LAR and DSR zones support that the landward thickness variation of unit B is caused by the structural thickening such as the underplating process. Structural features and reverse polarity suggest that the DSR as an upper interface of the underplated layer (unit B) corresponds to a shear plane or a fault zone with high pore fluid pressures. We found that most of the DSR was observed in a region which has not suffered from the 1946 coseismic dislocation even though it was locked during the interseismic period. The DSR as a shear plane or a fault zone constrains a regional variety of the coseismic dislocation around the updip limit of the Nankai seismogenic zone. Considering all of the DSR characteristics, we propose a hypothesis for the DSR's development and role. The DSR may play an important role as a possible releaser of the shear stress energy stored at the plate boundary around the updip limit of the Nankai seismogenic zone. A good correlation between the theoretical vertical displacement and seafloor topographic feature support the possible slip along the DSR as a shear plane.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380016869482675072","@type":"Researcher","foaf:name":[{"@value":"Jin‐Oh Park"}],"jpcoar:affiliationName":[{"@value":"Institute for Frontier Research on Earth Evolution Japan Marine Science and Technology Center  Yokosuka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520445508994","@type":"Researcher","foaf:name":[{"@value":"Tetsuro Tsuru"}],"jpcoar:affiliationName":[{"@value":"Institute for Frontier Research on Earth Evolution Japan Marine Science and Technology Center  Yokosuka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520445508997","@type":"Researcher","foaf:name":[{"@value":"Narumi Takahashi"}],"jpcoar:affiliationName":[{"@value":"Deep Sea Research Department Japan Marine Science and Technology Center  Yokosuka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520445509120","@type":"Researcher","foaf:name":[{"@value":"Takane Hori"}],"jpcoar:affiliationName":[{"@value":"Institute for Frontier Research on Earth Evolution Japan Marine Science and Technology Center  Yokosuka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520445508995","@type":"Researcher","foaf:name":[{"@value":"Shuichi Kodaira"}],"jpcoar:affiliationName":[{"@value":"Institute for Frontier Research on Earth Evolution Japan Marine Science and Technology Center  Yokosuka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520445508993","@type":"Researcher","foaf:name":[{"@value":"Ayako Nakanishi"}],"jpcoar:affiliationName":[{"@value":"Institute for Frontier Research on Earth Evolution Japan Marine Science and Technology Center  Yokosuka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520445508996","@type":"Researcher","foaf:name":[{"@value":"Seiichi Miura"}],"jpcoar:affiliationName":[{"@value":"Institute for Frontier Research on Earth Evolution Japan Marine Science and Technology Center  Yokosuka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520445509121","@type":"Researcher","foaf:name":[{"@value":"Yoshiyuki Kaneda"}],"jpcoar:affiliationName":[{"@value":"Institute for Frontier Research on Earth Evolution Japan Marine Science and Technology Center  Yokosuka Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2002-04","prism:volume":"107","prism:number":"B4","prism:startingPage":"2061"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2001JB000262"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2001JB000262"}],"createdAt":"2002-10-27","modifiedAt":"2023-10-17","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050306506454155648","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Alteration and dehydration of subducting oceanic crust within subduction zones : implications for decollement step-down and plate-boundary seismogenesis"},{"@value":"Alteration and dehydration of subducting oceanic crust within subduction zones : implications for décollement step-down and plate-boundary seismogenesis"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004229800450944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Contrasts in physical properties between the hanging wall and footwall of an exhumed seismogenic megasplay fault in a subduction zone—An example from the Nobeoka Thrust Drilling Project"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004230119570048","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Strong sediments at the deformation front, and weak sediments at the rear of the Nankai accretionary prism, revealed by triaxial deformation experiments"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004232135547264","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"3D geometry of a plate boundary fault related to the 2016 Off-Mie earthquake in the 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Rapid alteration of basalt-hosted pseudotachylytes from a shallow subduction complex"}]},{"@id":"https://cir.nii.ac.jp/crid/1360306508631948288","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Prevalence of mud diapirs in the Hyuga-nada subduction zone, southwest Japan, and its implications on hydrogeological processes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183980821376","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"OPS mélange: a new term for mélanges of convergent margins of the world"}]},{"@id":"https://cir.nii.ac.jp/crid/1360568464637615488","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Subduction of trench-fill sediments beneath an accretionary wedge: insights from sandbox analogue 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