{"@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/1363670320816458240.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1111/maps.12957"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmaps.12957"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.12957"}}],"dc:title":[{"@value":"High‐pressure polymorphs in Yamato‐790729 L6 chondrite and their significance for collisional conditions"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Shock pressure recorded in Yamato (Y)‐790729, classified as L6 type ordinary chondrite, was evaluated based on high‐pressure polymorph assemblages and cathodoluminescence (<jats:styled-content style=\"fixed-case\">CL</jats:styled-content>) spectra of maskelynite. The host‐rock of Y‐790729 consists mainly of olivine, low‐Ca pyroxene, plagioclase, metallic Fe‐Ni, and iron‐sulfide with minor amounts of phosphate and chromite. A shock‐melt vein was observed in the hostrock. Ringwoodite, majorite, akimotoite, lingunite, tuite, and xieite occurred in and around the shock‐melt vein. The shock pressure in the shock‐melt vein is about 14–23 GPa based on the phase equilibrium diagrams of high‐pressure polymorphs. Some plagioclase portions in the host‐rock occurred as maskelynite. Sixteen different <jats:styled-content style=\"fixed-case\">CL</jats:styled-content> spectra of maskelynite portions were deconvolved using three assigned emission components (centered at 2.95, 3.26, and 3.88 eV). The intensity of emission component at 2.95 eV was selected as a calibrated barometer to estimate shock pressure, and the results indicate pressures of about 11–19 GPa. The difference in pressure between the shock‐melt vein and host‐rock might suggest heterogeneous shock conditions. Assuming an average shock pressure of 18 GPa, the impact velocity of the parent‐body of Y‐790729 is calculated to be ~1.90 km s<jats:sup>−1</jats:sup>. The parent‐body would be at least ~10 km in size based on the incoherent formation mechanism of ringwoodite in Y‐790729.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383670320816458241","@type":"Researcher","foaf:name":[{"@value":"Yukako Kato"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Systems Science Graduate School of Science Hiroshima University Higashi‐Hiroshima 739‐8526 Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670320816458243","@type":"Researcher","foaf:name":[{"@value":"Toshimori Sekine"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Systems Science Graduate School of Science Hiroshima University Higashi‐Hiroshima 739‐8526 Japan"},{"@value":"Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670320816458242","@type":"Researcher","foaf:name":[{"@value":"Masahiko Kayama"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Systems Science Graduate School of Science Hiroshima University Higashi‐Hiroshima 739‐8526 Japan"},{"@value":"Creative Interdisciplinary Research Division Frontier Research Institute for Interdisciplinary Sciences Tohoku University Sendai 980‐8578 Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670320816458244","@type":"Researcher","foaf:name":[{"@value":"Masaaki Miyahara"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Systems Science Graduate School of Science Hiroshima University Higashi‐Hiroshima 739‐8526 Japan"},{"@value":"Department of Earth and Planetary Materials Science Graduate School of Science Tohoku University Sendai 980‐8578 Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670320816458240","@type":"Researcher","foaf:name":[{"@value":"Akira Yamaguchi"}],"jpcoar:affiliationName":[{"@value":"National Institute of Polar Research Tokyo 190‐8518 Japan"},{"@value":"Department of Polar Science School of Multidisciplinary Science SOKENDAI (The Graduate University for Advanced Studies) Tokyo 190‐8518 Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"10869379"},{"@type":"EISSN","@value":"19455100"}],"prism:publicationName":[{"@value":"Meteoritics & Planetary Science"}],"dc:publisher":[{"@value":"Wiley"}],"prism:publicationDate":"2017-09-25","prism:volume":"52","prism:number":"12","prism:startingPage":"2570","prism:endingPage":"2585"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmaps.12957"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.12957"}],"createdAt":"2017-09-25","modifiedAt":"2023-10-02","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360009142504201856","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Back‐transformation mechanisms of ringwoodite and majorite in an ordinary chondrite"}]},{"@id":"https://cir.nii.ac.jp/crid/1360017282426659200","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Vesicular Olivines and Pyroxenes in Shocked Kamargaon L6 Chondrite: Implications for Primary Volatiles and Its Multiple Impacts History"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285710774692352","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Cathodoluminescence of high‐pressure feldspar minerals as a shock barometer"}]},{"@id":"https://cir.nii.ac.jp/crid/1360572092406786944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Systematic investigations of high‐pressure polymorphs in shocked ordinary chondrites"}]},{"@id":"https://cir.nii.ac.jp/crid/1390854064974986880","@type":"Article","resourceType":"学術雑誌論文(journal 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