{"@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/1361137045253142016.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1144/gsl.sp.2006.253.01.09"}},{"identifier":{"@type":"URI","@value":"https://www.lyellcollection.org/doi/pdf/10.1144/GSL.SP.2006.253.01.09"}}],"dc:title":[{"@value":"Analogue and numerical modelling of accretionary prisms with a décollement in sediments"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title>\n          <jats:p>Active accretionary prisms at subduction margins generally include a horizontal detachment, décollement, within the sedimentary pile. The décollement, and its extension to undeformed regions (i.e., proto-décollement), corresponds to a layer of high fluid pressure. The deformation of the prisms, including such an anomalous layer, can be modelled and examined using analogue experiments and numerical simulations. Both these methods approximate the material under deformation as an assembly of particles (grains). The décollement layer is found to be best modelled by intercalating a layer with smaller internal frictional coefficient than the surrounding materials corresponding to the sediments. Our analogue experiments with dry sand and microglass beads reproduce structural geometry similar to that of interpreted seismic profiles at the toe of the prisms. Thrust faults originate from the horizontal beads layer and propagate upward with a constant angle of about 30°. Each of the fault bends produces a series of minor back thrusts. A particle image velocimetry (PIV) analysis revealed that the fault activity is characterized by intermittent reactivation and segmentation. The numerical simulations based on the distinct element method (DEM) were performed with similar kinematic settings and material properties as the analogue experiments. The numerical simulation results not only reproduce similar geometries as in the analogue experiments, but also show that the particle assembly experiences temporal variations in the deformation velocity and stress field as deformation propagates. This might be related to stick-slip motion of the frictional fault surfaces, which is a common feature of faulting during accretionary processes at subduction margins.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381137045253141888","@type":"Researcher","foaf:name":[{"@value":"Yasuhiro Yamada"}],"jpcoar:affiliationName":[{"@value":"Department of Civil and Earth Resources Engineering, Kyoto University\rKyoto 606-8501, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137045253142016","@type":"Researcher","foaf:name":[{"@value":"Kei Baba"}],"jpcoar:affiliationName":[{"@value":"JAPEX Research Center\rChiba 261-0025, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137045253141889","@type":"Researcher","foaf:name":[{"@value":"Toshifumi Matsuoka"}],"jpcoar:affiliationName":[{"@value":"Department of Civil and Earth Resources Engineering, Kyoto University\rKyoto 606-8501, Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03058719"},{"@type":"EISSN","@value":"20414927"}],"prism:publicationName":[{"@value":"Geological Society, London, Special Publications"}],"dc:publisher":[{"@value":"Geological Society of London"}],"prism:publicationDate":"2006-01","prism:volume":"253","prism:number":"1","prism:startingPage":"169","prism:endingPage":"183"},"reviewed":"false","dc:rights":["https://doi.org/10.15223/policy-002"],"url":[{"@id":"https://www.lyellcollection.org/doi/pdf/10.1144/GSL.SP.2006.253.01.09"}],"createdAt":"2008-04-30","modifiedAt":"2024-07-23","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360286995423171456","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Application of common reflection angle migration for imaging deformation structures in an inner accretionary wedge, Nankai Trough, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565166104891776","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"The effects of block shape on the seismic behavior of dry-stone masonry retaining walls: A numerical investigation by discrete element modeling"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183439905408","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Arcuate stress state in accretionary prisms from real-scale numerical sandbox experiments"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204062072064","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"アナログモデル実験で再現された付加体構造に対する反射法地震探査記録の合成"},{"@language":"en","@value":"Synthetic seismic sections of an accretionary prism reproduced by 3D sandbox experiment"},{"@language":"ja-Kana","@value":"アナログ モデル ジッケン デ サイゲンサレタ フカタイ コウゾウ ニ タイスル ハンシャホウ ジシン タンサ キロク ノ ゴウセイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204062436352","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Reconstruction of geologic structures with modeling technique and its seismic imaging"},{"@language":"ja","@value":"実験的手法を用いた地質構造の再現とその震探イメージング"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001205417980928","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Influences of Material Properties on Analogue Model Experiments of Geologic Structures"},{"@language":"ja","@value":"地質構造形成過程のアナログモデル実験における材料物性の影響"},{"@language":"ja-Kana","@value":"チシツ コウゾウ ケイセイ カテイ ノ アナログ モデル ジッケン ニ オケル ザイリョウ ブッセイ ノ エイキョウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206238793856","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Analogue model experiments on the formation of accretionary prism"},{"@language":"ja","@value":"付加体形成過程のモデル実験"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681213581696","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Structure, texture, and physical properties of accretionary prism sediments and fluid flow near the splay fault zone in the Nankai Trough, off Kii Peninsula"},{"@language":"ja","@value":"潮岬海底谷に露出する南海トラフ分岐断層付近の付加体堆積物の構造・組織・物性と流体移動"},{"@language":"ja-Kana","@value":"シオノミサキ カイテイコク ニ ロシュツ スル ナンカイ トラフ ブンキ ダンソウ フキン ノ フカタイ タイセキブツ ノ コウゾウ ソシキ ブッセイ ト リュウタイ イドウ"}]},{"@id":"https://cir.nii.ac.jp/crid/2051996266973440512","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Thermal maturity structures in an accretionary wedge by a numerical 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