{"@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/1360025431138047232.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1186/s40562-025-00396-4"}},{"identifier":{"@type":"URI","@value":"https://link.springer.com/content/pdf/10.1186/s40562-025-00396-4.pdf"}},{"identifier":{"@type":"URI","@value":"https://link.springer.com/article/10.1186/s40562-025-00396-4/fulltext.html"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"First direct evidence of the O–H isotopic composition of slab-derived water in the subduction zone, revealed by fluid inclusions in high-pressure metamorphic rocks"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title>\n          <jats:p>The O and H isotopic compositions of water provide clues to their origin and the water cycle in the deep Earth, and those of waters from hot springs can indicate their deep, non-meteoric origin. Quartz veins in high-pressure type metamorphic rocks can provide crucial information on paleo-subduction zone fluids. We investigated the O and H isotopic compositions of fluid inclusions in quartz veins collected from the Sanbagawa metamorphic belt, SW Japan, that are thought to preserve a trace element signature from slab-derived water. A total of 300–1000 mg of purified quartz grains were crushed, and the O and H isotopic compositions of the extracted water were analyzed using cavity ring-down spectroscopy (CRDS). The O isotopic compositions of the residual host quartz were determined by continuous-flow isotope ratio mass spectrometry (CF-IRMS). The fluid inclusions in schistosity-parallel quartz veins, which yield the trace element signatures of slab-derived water, have O and H isotopic compositions that do not plot along the meteoric water line but are consistent with previous numerical models of slab-derived water. Furthermore, the depths of the slab-derived water predicted by the numerical models are consistent with the peak pressures of the host metamorphic rocks. In contrast, fluid inclusions in quartz veins that cut across the main schistosity in the host rocks, which likely formed during the exhumation of the rock, have an isotopic composition intermediate between those of meteoric and slab-derived waters. The estimated temperature of equilibrium between the water and quartz O isotopic compositions is not consistent with the peak metamorphic temperature of the host rock, suggesting disequilibrium between the bulk quartz vein and trapped fluids. These results are the first direct evidence of the stable isotopic composition of slab-derived water, and thereby highlight the importance of direct determination of paleo-fluid composition using fluid inclusions.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380025431138047106","@type":"Researcher","foaf:name":[{"@value":"Kenta K. Yoshida"}]},{"@id":"https://cir.nii.ac.jp/crid/1420845751146443520","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"00580143"},{"@type":"NRID","@value":"1000000580143"},{"@type":"NRID","@value":"9000345336698"},{"@type":"NRID","@value":"9000398987944"},{"@type":"NRID","@value":"9000399823995"},{"@type":"NRID","@value":"9000388515012"},{"@type":"NRID","@value":"9000370282296"},{"@type":"NRID","@value":"9000347135198"},{"@type":"NRID","@value":"9000345295968"},{"@type":"NRID","@value":"9000363490277"},{"@type":"NRID","@value":"9000258463405"},{"@type":"NRID","@value":"9000395367402"},{"@type":"NRID","@value":"9000014663699"},{"@type":"NRID","@value":"9000394967678"},{"@type":"NRID","@value":"9000370281274"},{"@type":"NRID","@value":"9000347134327"},{"@type":"NRID","@value":"9000370281341"},{"@type":"NRID","@value":"9000283720748"},{"@type":"NRID","@value":"9000283724664"},{"@type":"NRID","@value":"9000347188027"},{"@type":"NRID","@value":"9000399227575"},{"@type":"NRID","@value":"9000237782049"},{"@type":"NRID","@value":"9000019202058"},{"@type":"NRID","@value":"9000403777307"},{"@type":"NRID","@value":"9000403777312"},{"@type":"NRID","@value":"9000370281498"},{"@type":"NRID","@value":"9000377397213"},{"@type":"NRID","@value":"9000345224948"},{"@type":"NRID","@value":"9000258462431"},{"@type":"NRID","@value":"9000345296062"},{"@type":"NRID","@value":"9000006546668"},{"@type":"NRID","@value":"9000283907078"},{"@type":"NRID","@value":"9000345296582"},{"@type":"NRID","@value":"9000347165125"},{"@type":"NRID","@value":"9000258408822"},{"@type":"NRID","@value":"9000258461869"},{"@type":"NRID","@value":"9000370281212"},{"@type":"NRID","@value":"9000347188339"},{"@type":"NRID","@value":"9000345225603"},{"@type":"NRID","@value":"9000258404742"},{"@type":"NRID","@value":"9000347079981"},{"@type":"NRID","@value":"9000327929562"},{"@type":"NRID","@value":"9000283724994"},{"@type":"NRID","@value":"9000347225814"},{"@type":"NRID","@value":"9000398988511"},{"@type":"NRID","@value":"9000258409958"},{"@type":"NRID","@value":"9000296666673"},{"@type":"NRID","@value":"9000007039556"},{"@type":"NRID","@value":"9000390430146"},{"@type":"NRID","@value":"9000347225889"},{"@type":"NRID","@value":"9000398987789"},{"@type":"NRID","@value":"9000258404133"},{"@type":"NRID","@value":"9000347188486"},{"@type":"NRID","@value":"9000024070185"},{"@type":"NRID","@value":"9000024070203"},{"@type":"NRID","@value":"9000283721233"},{"@type":"NRID","@value":"9000347225820"},{"@type":"NRID","@value":"9000347187482"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/ruemura"}],"foaf:name":[{"@value":"Ryu Uemura"}]},{"@id":"https://cir.nii.ac.jp/crid/1380025431138047234","@type":"Researcher","foaf:name":[{"@value":"Akira Ijiri"}]},{"@id":"https://cir.nii.ac.jp/crid/1380025431138047250","@type":"Researcher","foaf:name":[{"@value":"Minoru Ikehara"}]},{"@id":"https://cir.nii.ac.jp/crid/1380025431138047116","@type":"Researcher","foaf:name":[{"@value":"Takao Hirajima"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"21964092"}],"prism:publicationName":[{"@value":"Geoscience Letters"}],"dc:publisher":[{"@value":"Springer Science and Business Media 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caves"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050017832013355520","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Isotopic evolutionary track of water due to interaction with rocks and its use for tracing water cycle through the lithosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1050020474926309632","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Hot springs reflect the flooding of slab-derived water as a trigger of earthquakes"}]},{"@id":"https://cir.nii.ac.jp/crid/1050024423140838784","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Geochemical Signature of Deep Fluids Triggering Earthquake Swarm in the Noto Peninsula, Central 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Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1361981470768915840","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The Superdeep Well of the Kola Peninsula"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544419166510080","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Plate movements, ductile deformation and geochronology of the Sanbagawa belt, SW Japan: tectonic significance of 89–88 Ma Lu–Hf eclogite ages"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825893759742464","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Petrology of pelitic schists in the oligoclase‐biotite zone of the Sanbagawa metamorphic terrain, Japan: phase equilibria in the highest grade zone of a high‐pressure intermediate type of metamorphic belt"}]},{"@id":"https://cir.nii.ac.jp/crid/1363107369224719744","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Paragenesis of sodic pyroxene-bearing quartz schists: implications for the P-T history of the Sanbagawa belt"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951793893701632","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Subduction fluxes of water, carbon dioxide, chlorine, and potassium"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951796177031936","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Online oxygen isotope analysis of sub‐milligram quantities of biogenic opal using the inductive high‐temperature carbon reduction method coupled with continuous‐flow isotope ratio mass spectrometry"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204422674944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Spatial distribution and feature of slab-related deep-seated fluid in SW Japan"},{"@language":"ja","@value":"西南日本におけるスラブ起源深部流体の分布と特徴"},{"@language":"ja-Kana","@value":"セイナン ニホン ニ オケル スラブ キゲン シンブ リュウタイ ノ ブンプ ト トクチョウ"},{"@value":"Spatial distribution and feature of slab-related deep-seated fluid in SW Japan (in Japanese with English abstract)"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204550544768","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Geochemical characteristics of Na-Ca-Cl-HCO3 type waters in Arima and its vicinity in the western Kinki district, Japan."}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206545768704","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Chemical characteristics and trapping P-T conditions of fluid inclusions in quartz veins from the Sanbagawa metamorphic belt, SW Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679399386496","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Origin of saline waters distributed along the Median Tectonic Line in southwest Japan: Hydrogeochemical investigation on possibility of derivation of metamorphic dehydrated fluid from subducting oceanic plate"},{"@language":"ja","@value":"中央構造線沿いに湧出する高塩分泉の起源"},{"@value":"中央構造線沿いに湧出する高塩分泉の起源 : プレート脱水流体起源の可能性についての水文化学的検討"},{"@language":"ja-Kana","@value":"チュウオウ コウゾウセン ゾイ ニ ユウシュツ スル コウエンブンセン ノ キゲン : プレート ダッスイ リュウタイ キゲン ノ カノウセイ ニ ツイテ ノ スイモン カガクテキ ケントウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679528581376","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Hydrogen and oxygen isotopic ratios and major element chemistry of Japanese thermal water systems"},{"@value":"Hydrogen and oxygen isotopic rations and major element chemistry of Japanese thermal water system"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681521511936","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Annular fluid inclusions from a quartz vein intercalated with metapelites from the Besshi area of the Sanbagawa belt, SW Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681521727232","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Fluid inclusions with high Li/B ratio in a quartz vein from the Besshi area of the Sambagawa metamorphic belt: implications for deep geofluid evolution"}]},{"@id":"https://cir.nii.ac.jp/crid/1390290163833446272","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Combined tracers in hot spring waters across the Kii Peninsula, Japan: Implications for the origins of metamorphic fluids of the SW Japan forearc"}]},{"@id":"https://cir.nii.ac.jp/crid/1390855046371190272","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Decoupling of U–Pb ages and compositional zoning of garnet in a high–pressure marble from the eastern Iratsu body, Sanbagawa metamorphic terrane, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1571698601283939456","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Structural and petrological constraints on the tectonic evolution of the garnet-lherzolite facies Higashi-akaishi peridotite body, Sanbagawa belt, SW Japan"},{"@value":"Structural and petrological constraints on the tectonic evolution of the garnet‐lherzolite facies Higashi‐akaishi peridotite body, Sanbagawa Belt, SW Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/2051433317070229760","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Arima hot spring waters as a deep-seated brine from subducting 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