{"@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/1362262944779411200.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1126/science.1101109"}},{"identifier":{"@type":"URI","@value":"https://www.science.org/doi/pdf/10.1126/science.1101109"}},{"identifier":{"@type":"PMID","@value":"15618514"}},{"identifier":{"@type":"HANDLE","@value":"1983/a7a895ba-e3cc-4448-bc87-0d312c3e4942"}}],"dc:title":[{"@value":"Seismological Constraints on Core Composition from Fe-O-S Liquid Immiscibility"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>\n            Earth's core is composed primarily of iron (Fe) with about 10% by weight of lighter elements. The lighter elements are progressively enriched in the liquid outer core as the core cools and the inner core crystallizes. Thermodynamic modeling of Fe-O-S liquids shows that immiscible liquids can exist at outer-core pressures (136 to 330 gigapascals) at temperatures below 5200 kelvin and lead to layering in the outer core if the concentrations of the lighter elements are high enough. We found no evidence for layering in the outer core in the travel times and wave forms of\n            <jats:italic>P</jats:italic>\n            4\n            <jats:italic>KP</jats:italic>\n            seismic waves that reflect internally in the core. The absence of layers therefore constrains outer-core compositions in the Fe-O-S system to be no richer than 6 ± 1 weight % (wt %) O and 2 to 15 wt % S. A single core liquid composition of 10.5 ± 3.5 wt % S and 1.5 ± 1.5 wt % O is compatible with wave speeds and densities throughout the outer core.\n          </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382262944779411201","@type":"Researcher","foaf:name":[{"@value":"George Helffrich"}],"jpcoar:affiliationName":[{"@value":"Earth Sciences, University of Bristol, Wills Memorial Building, Queen's Road, Bristol BS8 1RJ, UK."},{"@value":"Earth and Planetary Science, Tokyo Institute of Technology, 1-2-1 Ookayama, Meguro-ku, Tokyo 152-6551, Japan."}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944779411200","@type":"Researcher","foaf:name":[{"@value":"Satoshi Kaneshima"}],"jpcoar:affiliationName":[{"@value":"Earth Sciences, University of Bristol, Wills Memorial Building, Queen's Road, Bristol BS8 1RJ, UK."},{"@value":"Earth and Planetary Science, Tokyo Institute of Technology, 1-2-1 Ookayama, Meguro-ku, Tokyo 152-6551, Japan."}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00368075"},{"@type":"EISSN","@value":"10959203"}],"prism:publicationName":[{"@value":"Science"}],"dc:publisher":[{"@value":"American Association for the Advancement of Science (AAAS)"}],"prism:publicationDate":"2004-12-24","prism:volume":"306","prism:number":"5705","prism:startingPage":"2239","prism:endingPage":"2242"},"reviewed":"false","url":[{"@id":"https://www.science.org/doi/pdf/10.1126/science.1101109"}],"createdAt":"2004-12-27","modifiedAt":"2024-01-10","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050845760740810880","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Penetration of Alfvén waves into an upper stably-stratified layer excited by magnetoconvection in rotating spherical shells"},{"@value":"Penetration of Alfven waves into an upper stably-stratified layer excited by magnetoconvection in 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article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Melting relationships in the Fe–Fe3S system up to the outer core conditions"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285708262611456","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Constraints on the core‐mantle boundary topography from <i>P</i>4<i>KP‐PcP</i> differential travel times"}]},{"@id":"https://cir.nii.ac.jp/crid/1360564063937520128","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Melting Experiments on Liquidus Phase Relations in the Fe‐S‐O Ternary System Under Core Pressures"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848658216098944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Compression of FeSi, Fe<sub>3</sub>C, Fe<sub>0.95</sub>O, and FeS under the core 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