{"@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/1360004233291493504.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2018gl077498"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2018GL077498"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2018GL077498"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Constraints on the Source of the Martian Magnetic Anomalies Inferred From Relaxation Time of Remanent Magnetization"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>The strong magnetic anomalies observed over Mars originate from remanence of deep crust, which should be preserved during 4 billion years. We estimate the relaxation time of remanence carried by various types of magnetite, considering temperature and pressure dependences of magnetic parameters. The estimation shows that acicular‐shaped single‐domain magnetite is needed to retain the thick magnetized layer during 4 billion years in a low‐Urey ratio scenario, whereas acicular‐shaped single‐domain, equidimensional single‐domain, and pseudo‐single‐domain magnetites can be the source of anomalies in a high‐Urey ratio scenario. In each case, fine‐grained (<10 μm) and preferably high‐aspect‐ratio magnetite in deep crust is needed to explain the observed anomalies.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004233291493521","@type":"Researcher","foaf:name":[{"@value":"M. Sato"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Science The University of Tokyo  Tokyo Japan"},{"@value":"Department of Earth and Planetary Sciences Tokyo Institute of Technology  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004233291493507","@type":"Researcher","foaf:name":[{"@value":"Y. Yamamoto"}],"jpcoar:affiliationName":[{"@value":"Center for Advanced Marine Core Research Kochi University  Kochi Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004233291493387","@type":"Researcher","foaf:name":[{"@value":"T. Nishioka"}],"jpcoar:affiliationName":[{"@value":"Graduate School of Integrated Arts and Sciences Kochi University  Kochi Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004233291493644","@type":"Researcher","foaf:name":[{"@value":"K. Kodama"}],"jpcoar:affiliationName":[{"@value":"Research Center for Knowledge Science in Cultural Heritage Doshisha University  Kyoto Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004233291493391","@type":"Researcher","foaf:name":[{"@value":"N. Mochizuki"}],"jpcoar:affiliationName":[{"@value":"Priority Organization for Innovation and Excellence Kumamoto University  Kumamoto Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004233291493638","@type":"Researcher","foaf:name":[{"@value":"M. Ushioda"}],"jpcoar:affiliationName":[{"@value":"Geological Survey of Japan National Institute of Advanced Industrial Science and Technology  Ibaraki Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004233291493376","@type":"Researcher","foaf:name":[{"@value":"R. Nakada"}],"jpcoar:affiliationName":[{"@value":"Kochi Institute for Core Sample Research Japan Agency for Marine‐Earth Science and Technology (JAMSTEC)  Kochi Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004233291493641","@type":"Researcher","foaf:name":[{"@value":"H. Tsunakawa"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Sciences Tokyo Institute of Technology  Tokyo Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00948276"},{"@type":"EISSN","@value":"19448007"}],"prism:publicationName":[{"@value":"Geophysical Research Letters"}],"dc:publisher":[{"@value":"American Geophysical Union 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