{"@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/1360004233483102208.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1038/s41598-017-17698-z"}},{"identifier":{"@type":"URI","@value":"https://www.nature.com/articles/s41598-017-17698-z.pdf"}},{"identifier":{"@type":"URI","@value":"https://www.nature.com/articles/s41598-017-17698-z"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"A new high-pressure form of Mg2SiO4 highlighting diffusionless phase transitions of olivine"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>High-pressure polymorphism of olivine (α-phase of Mg<jats:sub>2</jats:sub>SiO<jats:sub>4</jats:sub>) is of particular interest for geophysicists aiming to understand the structure and dynamics of the Earth’s interior because of olivine’s prominent abundance in the upper mantle. Therefore, natural and synthetic olivine polymorphs have been actively studied in the past half century. Here, we report a new high-pressure polymorph, the ε*-phase, which was discovered in a heavily shocked meteorite. It occurs as nanoscale lamellae and has a topotaxial relationship with the host ringwoodite (γ-phase of Mg<jats:sub>2</jats:sub>SiO<jats:sub>4</jats:sub>). Olivine in the host rock entrapped in a shock-induced melt vein initially transformed into polycrystalline ringwoodite through a nucleation and growth mechanism. The ringwoodite grains then coherently converted into the ε*-phase by shear transformation during subsequent pressure release. This intermediate metastable phase can be formed by all Mg<jats:sub>2</jats:sub>SiO<jats:sub>4</jats:sub> polymorphs via a shear transformation mechanism. Here, we propose high-pressure transformations of olivine that are enhanced by diffusionless processes, not only in shocked meteorites but also in thick and cold lithosphere subducting into the deep Earth.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420282801207133184","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"30335418"},{"@type":"NRID","@value":"1000030335418"},{"@type":"NRID","@value":"9000406304991"},{"@type":"NRID","@value":"9000283727964"},{"@type":"NRID","@value":"9000258402314"},{"@type":"NRID","@value":"9000413773576"},{"@type":"NRID","@value":"9000283904242"},{"@type":"NRID","@value":"9000345295772"},{"@type":"NRID","@value":"9000406039946"},{"@type":"NRID","@value":"9000411371442"},{"@type":"NRID","@value":"9000411393570"},{"@type":"NRID","@value":"9000389945752"},{"@type":"NRID","@value":"9000283903611"},{"@type":"NRID","@value":"9000283903763"},{"@type":"NRID","@value":"9000258434805"},{"@type":"NRID","@value":"9000000678245"},{"@type":"NRID","@value":"9000262359797"},{"@type":"NRID","@value":"9000413695197"},{"@type":"NRID","@value":"9000392826881"},{"@type":"NRID","@value":"9000402001333"},{"@type":"NRID","@value":"9000392139629"},{"@type":"NRID","@value":"9000392820603"},{"@type":"NRID","@value":"9000345347120"},{"@type":"NRID","@value":"9000347226799"},{"@type":"NRID","@value":"9000347138432"},{"@type":"NRID","@value":"9000392140223"},{"@type":"NRID","@value":"9000399373012"},{"@type":"NRID","@value":"9000017536109"},{"@type":"NRID","@value":"9000001937911"},{"@type":"NRID","@value":"9000361680050"},{"@type":"NRID","@value":"9000326264147"},{"@type":"NRID","@value":"9000401432493"},{"@type":"NRID","@value":"9000258603038"},{"@type":"NRID","@value":"9000399588962"},{"@type":"NRID","@value":"9000401800467"},{"@type":"NRID","@value":"9000410654579"},{"@type":"NRID","@value":"9000392139814"},{"@type":"NRID","@value":"9000406037109"},{"@type":"NRID","@value":"9000406039273"},{"@type":"NRID","@value":"9000258602721"},{"@type":"NRID","@value":"9000019232051"},{"@type":"NRID","@value":"9000283728035"},{"@type":"NRID","@value":"9000383709087"},{"@type":"NRID","@value":"9000396138607"},{"@type":"NRID","@value":"9000396138625"},{"@type":"NRID","@value":"9000403550708"},{"@type":"NRID","@value":"9000406038997"},{"@type":"NRID","@value":"9000258406526"},{"@type":"NRID","@value":"9000258433596"},{"@type":"NRID","@value":"9000262359801"},{"@type":"NRID","@value":"9000258402473"},{"@type":"NRID","@value":"9000258602752"},{"@type":"NRID","@value":"9000386337422"},{"@type":"NRID","@value":"9000347137818"},{"@type":"NRID","@value":"9000406039222"},{"@type":"NRID","@value":"9000258434737"},{"@type":"NRID","@value":"9000262359589"},{"@type":"NRID","@value":"9000401433682"},{"@type":"NRID","@value":"9000401431018"},{"@type":"NRID","@value":"9000392139686"},{"@type":"NRID","@value":"9000006033525"},{"@type":"NRID","@value":"9000405664687"},{"@type":"NRID","@value":"9000347137923"},{"@type":"NRID","@value":"9000347167538"},{"@type":"NRID","@value":"9000396138995"},{"@type":"NRID","@value":"9000413376135"},{"@type":"NRID","@value":"9000392139729"},{"@type":"NRID","@value":"9000367825072"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/saguaro-14"}],"foaf:name":[{"@value":"Naotaka Tomioka"}]},{"@id":"https://cir.nii.ac.jp/crid/1420564276173729024","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"40303599"},{"@type":"NRID","@value":"1000040303599"},{"@type":"ORCID","@value":"0000-0001-6907-0945"},{"@type":"NRID","@value":"9000006025160"},{"@type":"NRID","@value":"9000107365055"},{"@type":"NRID","@value":"9000411393571"},{"@type":"NRID","@value":"9000388531475"},{"@type":"NRID","@value":"9000398963825"},{"@type":"NRID","@value":"9000009459245"},{"@type":"NRID","@value":"9000262359796"},{"@type":"NRID","@value":"9000413695195"},{"@type":"NRID","@value":"9000409468019"},{"@type":"NRID","@value":"9000412278676"},{"@type":"NRID","@value":"9000018860320"},{"@type":"NRID","@value":"9000107364779"},{"@type":"NRID","@value":"9000283741914"},{"@type":"NRID","@value":"9000415074690"},{"@type":"NRID","@value":"9000258560243"},{"@type":"NRID","@value":"9000402784788"},{"@type":"NRID","@value":"9000258559920"},{"@type":"NRID","@value":"9000237782394"},{"@type":"NRID","@value":"9000397949135"},{"@type":"NRID","@value":"9000415313122"},{"@type":"NRID","@value":"9000009163977"},{"@type":"NRID","@value":"9000413356671"},{"@type":"NRID","@value":"9000412322359"},{"@type":"NRID","@value":"9000396138608"},{"@type":"NRID","@value":"9000396138624"},{"@type":"NRID","@value":"9000415325522"},{"@type":"NRID","@value":"9000015339269"},{"@type":"NRID","@value":"9000016882583"},{"@type":"NRID","@value":"9000410042154"},{"@type":"NRID","@value":"9000239589123"},{"@type":"NRID","@value":"9000411512295"},{"@type":"NRID","@value":"9000283727739"},{"@type":"NRID","@value":"9000401431019"},{"@type":"NRID","@value":"9000347137924"},{"@type":"NRID","@value":"9000258560835"},{"@type":"NRID","@value":"9000018667665"},{"@type":"NRID","@value":"9000413376133"},{"@type":"NRID","@value":"9000243744749"},{"@type":"NRID","@value":"9000391880581"},{"@type":"NRID","@value":"9000258433736"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0056040"}],"foaf:name":[{"@value":"Takuo Okuchi"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"20452322"}],"prism:publicationName":[{"@value":"Scientific Reports"}],"dc:publisher":[{"@value":"Springer Science and Business Media LLC"}],"prism:publicationDate":"2017-12-11","prism:volume":"7","prism:number":"1","prism:startingPage":"17351"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["https://creativecommons.org/licenses/by/4.0","https://creativecommons.org/licenses/by/4.0"],"url":[{"@id":"https://www.nature.com/articles/s41598-017-17698-z.pdf"},{"@id":"https://www.nature.com/articles/s41598-017-17698-z"}],"createdAt":"2017-12-05","modifiedAt":"2022-12-23","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Article","dc:title":"Article"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040282256806053120","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"15H03750"},{"@type":"JGN","@value":"JP15H03750"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H03750/"}],"notation":[{"@language":"ja","@value":"欠陥場におけるマントル鉱物中の原子拡散プロセスの解明"},{"@language":"en","@value":"Atomic diffusion in defect fields in mantle minerals"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050005508516260736","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Poirierite, a dense metastable polymorph of magnesium iron silicate in shocked meteorites"}]},{"@id":"https://cir.nii.ac.jp/crid/1050289321245028736","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Ultrafast olivine-ringwoodite transformation during shock compression"}]},{"@id":"https://cir.nii.ac.jp/crid/1050301927790416512","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Discovery of natural MgSiO3 tetragonal garnet in a shocked chondritic meteorite"},{"@value":"Discovery of natural MgSiO\n            <sub>3</sub>\n            tetragonal garnet in a shocked chondritic 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spinel"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951794554432768","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Olivine to spinel transformation in Mg2SiO4 via faulted structures"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951795276079104","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Experimental constraints on the depth of olivine metastability in subducting lithosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951795450240640","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The Tenham (Queensland) meteoritic shower of 1879 (With Plates XIV-XVII.)"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233271023153152","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Pressure‐temperature phase diagram for the Allende 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