{"@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/1360011145956579712.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2006jb004591"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2006JB004591"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2006JB004591"}}],"dc:title":[{"@value":"Curie temperatures of synthetic titanomagnetites in the Fe‐Ti‐O system: Effects of composition, crystal chemistry, and thermomagnetic methods"}],"description":[{"type":"abstract","notation":[{"@value":"The present study is aimed at improving the calibration of the compositional dependence of the Curie temperature (TC) of titanomagnetite (Tmt) on the basis of temperature‐dependent magnetic susceptibility (χ‐T) curves measured on synthetic Tmts in the Fe‐Ti‐O system. In order to assess the possible influence of high‐temperature cation vacancies onto the TC values, we have synthesized two types of assemblages in subsolidus conditions at 1 bar, 1100°C and 1300°C, under controlled oxygen fugacity conditions. Tmts synthesized in equilibrium with ilmenite‐hematitess (Ilmss) are expected to have the highest vacancy concentrations, those in equilibrium with wüstite (Wus) the lowest. The composition and homogeneity of the synthetic Tmts were carefully checked with a scanning electron microscope (SEM) and an electron microprobe (EMP). TC was determined from χ‐T curves using a kappabridge and, for comparison, from Ms‐T curves measured with a variable field translation balance. Our data set shows systematically higher TC values for Tmt coexisting with Ilmss than for Tmt coexisting with Wus. Most χ‐T curves are nonreversible, whereby the largest ΔTC (40 K) concern Tmt(+Ilmss) of intermediate compositions synthesized at 1300°C. Nonreversibility is interpreted as reflecting cation reordering in Tmt during the high‐temperature χ‐T measurements. TC values obtained from Ms‐T curves are higher than those obtained from the χ‐T curves, whereby the difference regularly increases (up to 40 K) with increasing Ti content, up to XUsp = 0.6. Our new calibration curves are suitable to retrieve Tmt compositions in basalts that were rapidly cooled and not oxidized by deuteric or hydrothermal fluids."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380011145956579712","@type":"Researcher","foaf:name":[{"@value":"Dominique Lattard"}],"jpcoar:affiliationName":[{"@value":"Mineralogisches Institut Universität Heidelberg Heidelberg Germany"}]},{"@id":"https://cir.nii.ac.jp/crid/1380011145956579714","@type":"Researcher","foaf:name":[{"@value":"Ralf Engelmann"}],"jpcoar:affiliationName":[{"@value":"Mineralogisches Institut Universität Heidelberg Heidelberg Germany"}]},{"@id":"https://cir.nii.ac.jp/crid/1380011145956579713","@type":"Researcher","foaf:name":[{"@value":"Agnes Kontny"}],"jpcoar:affiliationName":[{"@value":"Geologisch‐paläontologisches Institut Universität Heidelberg Heidelberg Germany"}]},{"@id":"https://cir.nii.ac.jp/crid/1380011145956579715","@type":"Researcher","foaf:name":[{"@value":"Ursula Sauerzapf"}],"jpcoar:affiliationName":[{"@value":"Mineralogisches Institut Universität Heidelberg Heidelberg Germany"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2006-12","prism:volume":"111","prism:number":"B12","prism:startingPage":"B12S28"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2006JB004591"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2006JB004591"}],"createdAt":"2006-12-19","modifiedAt":"2023-10-12","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360861705568581376","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Testing determinations of Thellier paleointensities on 1962 and 1983 lava flows and scoriae in Miyakejima, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390297372144109824","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Raman Spectroscopy of Natural Titanomagnetites"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367122683264","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Volcanic ash in bare ice south of Sør Rondane Mountains, Antarctica : geochemistry, rock magnetism and nondestructive magnetic detection with SQUID gradiometer"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2006jb004591"},{"@type":"CROSSREF","@value":"10.1186/s40623-016-0415-3_references_DOI_KGEx5ZF35tL6wtIF8nUJQq0Uj06"},{"@type":"CROSSREF","@value":"10.5188/ijsmer.25.243_references_DOI_KGEx5ZF35tL6wtIF8nUJQq0Uj06"},{"@type":"CROSSREF","@value":"10.1186/s40623-023-01781-z_references_DOI_KGEx5ZF35tL6wtIF8nUJQq0Uj06"}]}