{"@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/1362544419850136320.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1111/maps.12564"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmaps.12564"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.12564"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1111/maps.12564"}}],"dc:title":[{"@value":"<sup>40</sup>Ar/<sup>39</sup>Ar age of material returned from asteroid 25143 Itokawa"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>The Hayabusa mission to asteroid 25143, Itokawa, brought back 2000 small particles, which most closely resemble material found in<jats:styled-content style=\"fixed-case\">LL</jats:styled-content>4‐6 chondrites. We report an<jats:sup>40</jats:sup>Ar/<jats:sup>39</jats:sup>Ar age of 1.3 ± 0.3 Ga for a sample of Itokawa consisting of three grains with a total mass of ~2 μg. This age is lower than the >4.0 Ga ages measured for 75% of<jats:styled-content style=\"fixed-case\">LL</jats:styled-content>chondrites but close to one for Y‐790964 and its pairs. The flat<jats:sup>40</jats:sup>Ar/<jats:sup>39</jats:sup>Ar release spectrum of the sample suggests complete degassing 1.3 Ga ago. Recent solar heating in Itokawa's current orbit does not appear likely to have reset that age. Solar or impact heating 1.3 Ga ago could have done so. If impact heating was responsible, then the 1.3 Ga age sets an upper bound on the time at which the Itokawa rubble pile was assembled and suggests that rubble pile creation was an ongoing process in the inner solar system for at least the first 3 billion years of solar system history.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382544419850136320","@type":"Researcher","foaf:name":[{"@value":"Jisun Park"}],"jpcoar:affiliationName":[{"@value":"Department of Chemistry and Chemical Biology Rutgers University Piscataway New Jersey 08854 USA"},{"@value":"Lunar and Planetary Institute 3600 Bay Area Blvd. Houston Texas 77058 USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136325","@type":"Researcher","foaf:name":[{"@value":"Brent D. Turrin"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Science Rutgers University Piscataway New Jersey 08854 USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136329","@type":"Researcher","foaf:name":[{"@value":"Gregory F. Herzog"}],"jpcoar:affiliationName":[{"@value":"Department of Chemistry and Chemical Biology Rutgers University Piscataway New Jersey 08854 USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136326","@type":"Researcher","foaf:name":[{"@value":"Fara N. Lindsay"}],"jpcoar:affiliationName":[{"@value":"Department of Chemistry and Chemical Biology Rutgers University Piscataway New Jersey 08854 USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136327","@type":"Researcher","foaf:name":[{"@value":"Jeremy S. Delaney"}],"jpcoar:affiliationName":[{"@value":"Department of Chemistry and Chemical Biology Rutgers University Piscataway New Jersey 08854 USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136321","@type":"Researcher","foaf:name":[{"@value":"Carl C. Swisher"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Science Rutgers University Piscataway New Jersey 08854 USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136324","@type":"Researcher","foaf:name":[{"@value":"Masayuki Uesugi"}],"jpcoar:affiliationName":[{"@value":"Institute of Space and Astronautical Sciences (ISAS) of the Japan Aerospace Exploration Agency (JAXA) Sagamihara 252‐5210 Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136322","@type":"Researcher","foaf:name":[{"@value":"Yuzuru Karouji"}],"jpcoar:affiliationName":[{"@value":"Institute of Space and Astronautical Sciences (ISAS) of the Japan Aerospace Exploration Agency (JAXA) Sagamihara 252‐5210 Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136192","@type":"Researcher","foaf:name":[{"@value":"Toru Yada"}],"jpcoar:affiliationName":[{"@value":"Institute of Space and Astronautical Sciences (ISAS) of the Japan Aerospace Exploration Agency (JAXA) Sagamihara 252‐5210 Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136328","@type":"Researcher","foaf:name":[{"@value":"Masanao Abe"}],"jpcoar:affiliationName":[{"@value":"Institute of Space and Astronautical Sciences (ISAS) of the Japan Aerospace Exploration Agency (JAXA) Sagamihara 252‐5210 Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136193","@type":"Researcher","foaf:name":[{"@value":"Tatsuaki Okada"}],"jpcoar:affiliationName":[{"@value":"Institute of Space and Astronautical Sciences (ISAS) of the Japan Aerospace Exploration Agency (JAXA) Sagamihara 252‐5210 Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544419850136323","@type":"Researcher","foaf:name":[{"@value":"Yukihiro Ishibashi"}],"jpcoar:affiliationName":[{"@value":"Institute of Space and Astronautical Sciences (ISAS) of the Japan Aerospace Exploration Agency (JAXA) Sagamihara 252‐5210 Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"10869379"},{"@type":"EISSN","@value":"19455100"}],"prism:publicationName":[{"@value":"Meteoritics & Planetary Science"}],"dc:publisher":[{"@value":"Wiley"}],"prism:publicationDate":"2015-11-06","prism:volume":"50","prism:number":"12","prism:startingPage":"2087","prism:endingPage":"2098"},"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/10.1111%2Fmaps.12564"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.12564"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1111/maps.12564"}],"createdAt":"2015-11-08","modifiedAt":"2024-06-12","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050002213034034816","@type":"Article","resourceType":"学術雑誌論文(journal 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