{"@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/1361699996490894976.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/0883-2927(94)90059-0"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:0883292794900590?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:0883292794900590?httpAccept=text/plain"}},{"identifier":{"@type":"NAID","@value":"30006475274"}}],"dc:title":[{"@value":"Carbon and helium isotopic ratios at Kusatsu-Shirane Volcano, Japan"}],"description":[{"notation":[{"@value":"Abstract   We have measured the chemical compositions, He/Ne ratios, He and C isotopes of 14 gas samples collected from the crater lake, fumaroles and hot springs associated with Kusatsu-Shirane Volcano, Japan. The 3 He/ 4 He ratio decreases with increasing distance from the central crater of the volcano to the sampling site whereas the δ 13 C value of CO 2  increases with the distance. This tendency suggests that high 3 He/ 4 He-low δ 13 C magmatic gas is mixed with and/or diluted by low 3 He/ 4 He-high δ 13 C crustal gas with increasing distance from the crater. Alternatively, the variation of δ 13 C values may be the result of isotope fractionation during migration since the isotope shift is relatively small. Based on the apparent mixing trend in a 3 He/ 4 He-δ 13 C diagram, the magmatic He and CO 2  in the volcano may have a 3 He/ 4 He ratio of 8 R atm  and a δ 13 C value of −3.2%, respectively. The CO 2 / 3 He ratios show a positive correlation with temperature of fumaroles or hot springs, which may be caused by a difference of temperature dependencies of the solubilities between CO 2  and He."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381699996490894978","@type":"Researcher","foaf:name":[{"@value":"Yuji Sano"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996490894977","@type":"Researcher","foaf:name":[{"@value":"Jun-Ichi Hirabayashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996490894979","@type":"Researcher","foaf:name":[{"@value":"Takeshi Oba"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996490894976","@type":"Researcher","foaf:name":[{"@value":"Toshitaka Gamo"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"08832927"}],"prism:publicationName":[{"@value":"Applied Geochemistry"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"1994-07","prism:volume":"9","prism:number":"4","prism:startingPage":"371","prism:endingPage":"377"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/","https://www.elsevier.com/legal/tdmrep-license"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:0883292794900590?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:0883292794900590?httpAccept=text/plain"}],"createdAt":"2003-08-06","modifiedAt":"2025-09-10","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050568617200406400","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Anatomy of active volcanic edifice at the Kusatsu–Shirane volcano, Japan, by magnetotellurics: hydrothermal implications for volcanic unrests"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004232051056128","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Effect of the volcanic front migration on helium, nitrogen, argon, and carbon geochemistry of hydrothermal/magmatic fluids from Hokkaido volcanoes, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004232324656384","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Magma-derived CO2 emissions in the Tengchong volcanic field, SE Tibet: Implications for deep carbon cycle at intra-continent subduction zone"}]},{"@id":"https://cir.nii.ac.jp/crid/1360005744245266688","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Time Variation in the Chemical and Isotopic Composition of Fumarolic Gasses at Kusatsu-Shirane Volcano, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360017280632497664","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Older magma at Aso caldera than at Unzen stratovolcano in south west Japan as recorded through helium isotopes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360025429410533888","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Water and gas geochemistry of springs in Ulleungdo volcano, South Korea: Implications for degassing of upper mantle-derived volatiles in Northeast Asia"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567181201865216","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Variations in thermal state revealed by the geochemistry of fumarolic gases and hot-spring waters of the Tateyama volcanic hydrothermal system, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567182296066432","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Spatial and temporal variations of gas geochemistry at Mt. 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