{"@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/1363670321241208448.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.tecto.2007.08.003"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S004019510700248X?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S004019510700248X?httpAccept=text/plain"}}],"dc:title":[{"@value":"Physical conditions producing slab stagnation: Constraints of the Clapeyron slope, mantle viscosity, trench retreat, and dip angles"}],"description":[{"notation":[{"@value":"Abstract   Recent seismic tomography has revealed various morphologies in the subducted lithosphere. In particular, significant flattening and stagnation of slabs around the 660-km boundary are seen in some areas beneath the northwestern Pacific subduction zones. We examined the cause of slab stagnation in terms of the Clapeyron slope of the phase transformation from ringwoodite to perovskite + magnesiowustite, trench retreat velocity, dip angles, and high viscosity of the lower mantle based on two-dimensional (2-D) numerical simulations of thermal convection. In particular, we examined the conditions necessary for slab stagnation assuming a very small absolute value of the Clapeyron slope, which were proposed based on recent high-pressure, high-temperature (high P–T) experiments. Our calculations show that slabs tend to stagnate above the 660-km boundary with an increasing absolute value of the Clapeyron slope, viscosity jump at the boundary, and trench retreat velocity and a decreasing initial dip angle. Stagnant slabs could be obtained numerically for a realistic range of parameters obtained from high P–T experiments and other geophysical observations combining buoyancy, high lower-mantle viscosity, and trench retreat. We found that a low dip angle of a descending slab at the bottom of the upper mantle plays an important role in slab stagnation. Two main regimes underlie slab stagnation: buoyancy-dominated and viscosity-dominated regimes. In the viscosity-dominated regime, it is possible for slabs to stagnate above the 660-km boundary, even when the value of the Clapeyron slope is 0 MPa/K."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383670321241208576","@type":"Researcher","foaf:name":[{"@value":"Yoku Torii"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670321241208448","@type":"Researcher","foaf:name":[{"@value":"Shoichi Yoshioka"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00401951"}],"prism:publicationName":[{"@value":"Tectonophysics"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2007-12","prism:volume":"445","prism:number":"3-4","prism:startingPage":"200","prism:endingPage":"209"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/","https://www.elsevier.com/legal/tdmrep-license"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S004019510700248X?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S004019510700248X?httpAccept=text/plain"}],"createdAt":"2007-08-11","modifiedAt":"2025-09-22","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050294045368637824","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Contrasting volcano spacing along SW Japan arc caused by difference in age of subducting lithosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1050575520347085696","@type":"Article","resourceType":"学術雑誌論文(journal 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