{"@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/1360302865538544896.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1111/iar.12503"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1111/iar.12503"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"X‐ray computed tomography of deep‐sea clay as tools to detect rare earth elements and yttrium enrichment"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Pelagic clay that contains rare‐earth elements and yttrium (REY) at over 2000 ppm (termed “highly REY‐rich mud”) has been reported from a few areas in the western North Pacific Ocean through focused geochemical analyses. Those REY are carried by biogenic calcium phosphate, suggesting that the formation of highly REY‐rich mud involves enhanced biological productivity. However, detecting REY enrichment in sediment is time‐consuming, and the global significance of the formation of REY‐rich mud is still under debate. Here we perform x‐ray computed tomography (CT) analyses on cores recovered around Minamitorishima Island and demonstrate the positive correlation with highly REY‐rich mud and high CT numbers of the sediment. The variation of the CT number matches the wet bulk density. Further quantitative analyses using direct measurements of density and geochemistry suggest that a grain density increase and a porosity decrease due to the REY‐carrying biogenic apatite are essential to explain the high CT numbers in the REY‐enriched layer. While the chemical composition itself is of minor importance to elevate the CT numbers, our results suggest that x‐ray CT can be a proxy for highly REY‐rich mud.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420564276183173632","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"20609862"},{"@type":"NRID","@value":"1000020609862"},{"@type":"NRID","@value":"9000347083667"},{"@type":"NRID","@value":"9000376926620"},{"@type":"NRID","@value":"9000347136032"},{"@type":"NRID","@value":"9000264268454"},{"@type":"NRID","@value":"9000386337364"},{"@type":"NRID","@value":"9000386337409"},{"@type":"NRID","@value":"9000345439041"},{"@type":"NRID","@value":"9000018698871"},{"@type":"NRID","@value":"9000350560356"},{"@type":"NRID","@value":"9000412001502"},{"@type":"NRID","@value":"9000370280775"},{"@type":"NRID","@value":"9000338418958"},{"@type":"NRID","@value":"9000258418198"},{"@type":"NRID","@value":"9000338418914"},{"@type":"NRID","@value":"9000239847704"},{"@type":"NRID","@value":"9000350560373"},{"@type":"NRID","@value":"9000345439063"},{"@type":"NRID","@value":"9000347167287"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/yoichiusui"}],"foaf:name":[{"@value":"Yoichi Usui"}],"jpcoar:affiliationName":[{"@value":"School of Geoscience and Civil Engineering, College of Science and Engineering Kanazawa University  Ishikawa Japan"},{"@value":"Volcanoes and Earth's Interior Research Center, Research Institute for Marine Geodynamics Japan Agency for Marine‐Earth Science and Technology (JAMSTEC)  Kanagawa Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380302865538545029","@type":"Researcher","foaf:name":[{"@value":"Kazutaka Yasukawa"}],"jpcoar:affiliationName":[{"@value":"Frontier Research Center for Energy and Resources, School of Engineering The University of Tokyo  Tokyo Japan"},{"@value":"Department of Systems Innovation, School of Engineering The University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380302865538545030","@type":"Researcher","foaf:name":[{"@value":"Koichi Iijima"}],"jpcoar:affiliationName":[{"@value":"Submarine Resources Research Center, Research Institute for Marine Resources Utilization Japan Agency for Marine‐Earth Science and Technology (JAMSTEC)  Kanagawa Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380302865538545025","@type":"Researcher","foaf:name":[{"@value":"Hideaki Machiyama"}],"jpcoar:affiliationName":[{"@value":"Submarine Resources Research Center, Research Institute for Marine Resources Utilization Japan Agency for Marine‐Earth Science and Technology (JAMSTEC)  Kanagawa Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380302865538545024","@type":"Researcher","foaf:name":[{"@value":"Yuji Ichiyama"}],"jpcoar:affiliationName":[{"@value":"Department of Earth Science Chiba University  Chiba Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380302865538545027","@type":"Researcher","foaf:name":[{"@value":"Erika Tanaka"}],"jpcoar:affiliationName":[{"@value":"Volcanoes and Earth's Interior Research Center, Research Institute for Marine Geodynamics Japan Agency for Marine‐Earth Science and Technology (JAMSTEC)  Kanagawa Japan"},{"@value":"Marine Core Research Institute Kochi University  Kochi Japan"},{"@value":"Ocean Resources Research Center for Next Generation Chiba Institute of Technology  Chiba Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380302865538545028","@type":"Researcher","foaf:name":[{"@value":"Koichiro Fujinaga"}],"jpcoar:affiliationName":[{"@value":"Department of Systems Innovation, School of Engineering The University of Tokyo  Tokyo Japan"},{"@value":"Ocean Resources Research Center for Next Generation Chiba Institute of Technology  Chiba Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"10384871"},{"@type":"EISSN","@value":"14401738"}],"prism:publicationName":[{"@value":"Island Arc"}],"dc:publisher":[{"@value":"Wiley"}],"prism:publicationDate":"2023-01","prism:volume":"32","prism:number":"1"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1111/iar.12503"}],"createdAt":"2023-10-24","modifiedAt":"2024-01-03","project":[{"@id":"https://cir.nii.ac.jp/crid/1040011231180652672","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"22K18744"},{"@type":"JGN","@value":"JP22K18744"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22K18744/"}],"notation":[{"@language":"ja","@value":"細菌由来磁鉄鉱の定向配列の検出：細菌活動および古地球磁場研究の新展開"},{"@language":"en","@value":"Searching for preferential orientations of magnetic fossils in rocks: possible clues to paleomagnetism and bacterial ecology"}]},{"@id":"https://cir.nii.ac.jp/crid/1040567171949015680","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"20H05658"},{"@type":"JGN","@value":"JP20H05658"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20H05658/"}],"notation":[{"@language":"ja","@value":"地球環境変動・資源生成の真に革新的な統合理論の創成"},{"@language":"en","@value":"Creation of a unified theory of global environmental changes and resource generation"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002216858898816","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Tracking the spatiotemporal variations of statistically independent components involving enrichment of rare-earth elements in deep-sea sediments"}]},{"@id":"https://cir.nii.ac.jp/crid/1360009142749697024","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Chemostratigraphic Correlations of Deep-Sea Sediments in the Western North Pacific Ocean: A New Constraint on the Distribution of Mud Highly Enriched in Rare-Earth Elements"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011143642731136","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Calcium Phosphate Biominerals"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011146104045312","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Progressive Microfabric Changes in Unconsolidated Pelagic and Hemipelagic Sediments Down to 180 mbsf, Northwest Pacific, ODP Leg 185, Site 1149"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285708462245120","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The tremendous potential of deep-sea mud as a source of rare-earth elements"}]},{"@id":"https://cir.nii.ac.jp/crid/1360286992162048512","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Chemostratigraphy of deep-sea sediments in the western North Pacific Ocean: Implications for genesis of mud highly enriched in rare-earth elements and yttrium"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292620322671872","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Geotechnical Properties and Consolidation Characteristics of North Pacific Sediments, Sites 881, 883, and 885/886"}]},{"@id":"https://cir.nii.ac.jp/crid/1360294643700922880","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Geological features and resource potential of deep-sea mud highly enriched in rare-earth elements in the Central Pacific Basin and the Penrhyn Basin"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298765165695616","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"No state change in pelagic fish production and biodiversity during the Eocene–Oligocene transition"}]},{"@id":"https://cir.nii.ac.jp/crid/1360302868768316032","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Bulk density calibration for X-ray tomographic analyses of marine sediments"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565169058874624","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Determination of Host Phase of Lanthanum in Deep-sea REY-rich Mud by XAFS and µ-XRF Using High-energy Synchrotron Radiation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567182120212224","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Synchrotron X-ray spectroscopic perspective on the formation mechanism of REY-rich muds in the Pacific Ocean"}]},{"@id":"https://cir.nii.ac.jp/crid/1360568468126256000","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Statistic and Isotopic Characterization of Deep‐Sea Sediments in the Western North Pacific Ocean: Implications for Genesis of the Sediment Extremely Enriched in Rare Earth Elements"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574095635944704","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"X-ray computed tomography; a nondestructive method for quantitative analysis of sediment cores"}]},{"@id":"https://cir.nii.ac.jp/crid/1360584344420920192","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The influence of metal content on the physical and mineralogical properties of pelagic manganese nodules"}]},{"@id":"https://cir.nii.ac.jp/crid/1360584346098692480","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Saturated Bulk Density, Grain Density and Porosity of Sediment Cores from the Western Equatorial Pacific: Leg 7, Glomar Challenger"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846641737264512","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Deep-sea mud in the Pacific Ocean as a potential resource for rare-earth elements"}]},{"@id":"https://cir.nii.ac.jp/crid/1361131416979662976","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Significant impacts of pelagic clay on average chemical composition of subducting sediments: New insights from discovery of extremely rare-earth elements and yttrium-rich mud at Ocean Drilling Program Site 1149 in the western North Pacific Ocean"}]},{"@id":"https://cir.nii.ac.jp/crid/1361699996360584960","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Tables of x-ray mass attenuation coefficients and mass energy-absorption\n                        coefficients 1 keV to 20 MeV for elements Z = 1 to 92 and 48 additional\n                        substances of dosimetry interest"}]},{"@id":"https://cir.nii.ac.jp/crid/1363388845522299264","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Chemistry of Pacific pelagic sediments"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204553476480","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Geological factors responsible for REY-rich mud in the western North Pacific Ocean: Implications from mineralogy and grain size distributions"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204553478272","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Geochemistry of REY-rich mud in the Japanese Exclusive Economic Zone around Minamitorishima Island"},{"@value":"Geochemistry of rare-earth elements and yttrium-rich muds in the Japanese Exclusive Economic Zone around Minamitorishima Island"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204554245376","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Rare-earth, major, and trace element geochemistry of deep-sea sediments in the Indian Ocean: Implications for the potential distribution of REY-rich mud in the Indian Ocean"},{"@value":"The chemical composition of subducting sediment and its consequences for the crust and mantle"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206544692992","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Quantitative evaluation of attenuation contrast of minerals by using a medical X-ray CT scanner."}]},{"@id":"https://cir.nii.ac.jp/crid/1390011859823273088","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"Discovery of extremely REY-rich mud in the western North Pacific Ocean"},{"@value":"KR13-02 Cruise members discovery of extremely REY-rich mud in the western North Pacific Ocean"},{"@value":"The discovery of extremely REY-rich mud in the western North Pacific Ocean"}]},{"@id":"https://cir.nii.ac.jp/crid/1390574809776669312","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"Fish proliferation and rare-earth deposition by topographically induced upwelling at the late Eocene cooling event"}]},{"@id":"https://cir.nii.ac.jp/crid/2051151842091723392","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"X-ray computerized tomography analysis and density estimation using a sediment core from the Challenger Mound area in the Porcupine Seabight, off Western Ireland"}]},{"@id":"https://cir.nii.ac.jp/crid/2051714792008784896","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Magnetostratigraphic evidence for post-depositional distortion of osmium isotopic records in pelagic clay and its implications for mineral flux estimates"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1111/iar.12503"},{"@type":"KAKEN","@value":"PRODUCT-25187268"},{"@type":"KAKEN","@value":"PRODUCT-25039598"},{"@type":"OPENAIRE","@value":"doi_________::c6b07ed01b001e2d69938cf95a74e944"}]}