{"@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/1361699995921359104.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2004jb003504"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2004JB003504"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2004JB003504"}}],"dc:title":[{"@value":"Seismological signature of chemical differentiation of Earth's upper mantle"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Chemical differentiation from pyrolite to harzburgite due to partial melting and melt extraction process causes the chemical heterogeneity in Earth's upper mantle that can be detected by seismological observations. The variation in major element chemistry in natural samples reflects complicated processes that include not only partial melting but also other various magmatic processes. On the basis of a comparison of chemical and mineralogical compositions of natural peridotites with those from melting experiment, density and seismic velocities of various peridotites are calculated for the range of pressure and temperature in the upper mantle using the latest data on mineral thermoelasticity. We conclude that the seismic velocities of shallow oceanic peridotites is characterized by a single parameter such as Mg # (molar ratio Mg/(Mg + Fe)), whereas the characterization of the deep continental peridotites requires two parameters, Mg # and Opx # (volume fraction of orthopyroxene). In agreement with previous studies, we find that in spinel stability field, the seismic velocities have positive correlation with Mg # from pyrolite to residual harzburgite, while in garnet stability field, seismic velocities of residual harzburgite are indistinguishable from those of pyrolite. The seismic velocities of the deep continental peridotites are lower than those of pyrolite and residual harzburgite because of the high concentration of orthopyroxene with low seismic velocities and have large pressure dependence. A jump of seismic velocity will occur at 300 km in orthopyroxene‐rich continental harzburgite due to the orthorhombic to high‐pressure monoclinic phase transition in (Mg, Fe)SiO<jats:sub>3</jats:sub> pyroxene. This phase transition may correspond to the X discontinuity.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381699995921359104","@type":"Researcher","foaf:name":[{"@value":"Kyoko N. Matsukage"}],"jpcoar:affiliationName":[{"@value":"Department of Geology and Geophysics Yale University  New Haven Connecticut USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995921359105","@type":"Researcher","foaf:name":[{"@value":"Yu Nishihara"}],"jpcoar:affiliationName":[{"@value":"Department of Geology and Geophysics Yale University  New Haven Connecticut USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380579819529721088","@type":"Researcher","foaf:name":[{"@value":"Shun‐ichiro Karato"}],"jpcoar:affiliationName":[{"@value":"Department of Geology and Geophysics Yale University  New Haven Connecticut USA"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2005-12","prism:volume":"110","prism:number":"B12","prism:startingPage":"B12305"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2004JB003504"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2004JB003504"}],"createdAt":"2005-12-13","modifiedAt":"2023-10-12","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050001335841052544","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Major element composition of an Early Enriched Reservoir: Constraints from 142Nd/144Nd isotope systematics in the early Earth and high pressure melting experiments of a primitive peridotite"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283689327092736","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Origin of geochemical mantle components: Role of spreading ridges and thermal evolution of mantle"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283690892886144","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Seismic anisotropy of the uppermost mantle beneath the Rio Grande rift: Evidence from Kilbourne Hole peridotite xenoliths, New Mexico"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285707143316736","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Behaviour of subducted water and its role in magma genesis in the NE Japan arc: A combined geophysical and geochemical approach"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846639280483200","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Origin of geochemical mantle components: Role of subduction filter"}]},{"@id":"https://cir.nii.ac.jp/crid/1360857593727300736","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Simultaneous Analysis of Seismic Velocity and Electrical Conductivity in the Crust and the Uppermost Mantle: A Forward Model and Inversion Test Based on Grid Search"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204237154048","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"上部マントル深部における含水下での残留岩"},{"@language":"en","@value":"Residues of Hydrous Peridotites in the Deep Earth's upper Mantle"},{"@value":"上部マントル深部における含水下での残留岩 : 高温高圧融解実験からわかること"},{"@language":"ja-Kana","@value":"ジョウブ マントル シンブ ニ オケル ガン ミナシモ デ ノ ザンリュウガン : コウオン コウアツ ユウカイ ジッケン カラ ワカル コト"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204237163136","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Chemical Composition of Mantle Wedge Fluids"},{"@language":"ja","@value":"マントルウェッジ流体の化学組成"},{"@language":"ja-Kana","@value":"マントルウェッジ リュウタイ ノ カガク ソセイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204237559168","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"北西太平洋プレートの地球化学"},{"@language":"en","@value":"Geochemistry of the NW Pacific Plate: Origins of Indian and Pacific Mantles and Nature of Their Boundary"},{"@value":"北西太平洋プレートの地球化学 : インド洋-太平洋型マントルの成因とマントル境界の特性"},{"@language":"ja-Kana","@value":"ホクセイ タイヘイヨウ プレート ノ チキュウ カガク : インドヨウ-タイヘイヨウガタ マントル ノ セイイン ト マントル キョウカイ ノ トクセイ"},{"@value":"Geochemistry of the NW Pacific Plate: Origins of Indian 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