{"@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/1390282679528304128.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2343/geochemj.42.61"}},{"identifier":{"@type":"COI","@value":"1:CAS:528:DC%2BD1cXlslCltbc%3D"}},{"identifier":{"@type":"NAID","@value":"130004469212"}}],"dc:title":[{"@language":"en","@value":"Relationship between geological structure and helium isotopes in deep ground-water from the Osaka Basin: Application to deep groundwater hydrology"},{"@value":"Relationship between geological structure and helium isotope in deep groundwater from the Osaka Basin: application to deep groundwater hydrology"}],"dc:language":"en","description":[{"type":"abstract","notation":[{"@language":"en","@value":"The relationship between geological structure and helium isotopes is discussed for deep groundwaters from the Osaka sedimentary basin, southwest Japan, to understand dissolved He in groundwater for hydrological application. Although this area shows no Quaternary volcanic activity, nearly upper mantle-like <sup>3</sup>He/<sup>4</sup>He ratio (1.1 × 10<sup>-5</sup>) has been observed in the area along the fault system where the basement rocks are outcropped. In contrast, deep groundwaters from the lowest part of the aquifers beneath the Osaka Basin showed a wide variation in <sup>3</sup>He/<sup>4</sup>He ratio (0.27-8 × 10<sup>-6</sup>), which seems to reflect the geological structure. The moderately high <sup>3</sup>He/<sup>4</sup>He ratios, not as high as those in the mantle value, are due to a contribution of radiogenic <sup>4</sup>He within the aquifer. The flux of mantle He through the Uemachi thrust fault into the aquifers in the east block (hanging wall of the fault) of the Osaka Basin will be smaller than those in the west block (foot wall), because mantle He through this fault encountered the aquifers in the west block and dissolved in this aquifer. The model for the Osaka Basin presented in this study implies that there are at least two different sources of He flux into an aquifer; mantle He flux through the fault system and crustal He from the underlying formation. The former should be spatially heterogeneous, while crustal <sup>4</sup>He flux is rather spatially constant throughout the lowermost part of the Osaka Basin."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410001204422134402","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000004600810"},{"@type":"NRID","@value":"9000001309368"},{"@type":"NRID","@value":"9000002250633"},{"@type":"NRID","@value":"9000257916796"},{"@type":"NRID","@value":"9000286288148"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0205603"}],"foaf:name":[{"@language":"en","@value":"MORIKAWA NORITOSHI"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, AIST"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282679528304256","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000257916797"}],"foaf:name":[{"@language":"en","@value":"KAZAHAYA KOHEI"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 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HIROCHIKA"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00167002"},{"@type":"LISSN","@value":"00167002"},{"@type":"EISSN","@value":"18805973"}],"prism:publicationName":[{"@language":"en","@value":"GEOCHEMICAL JOURNAL"},{"@language":"ja","@value":"ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ"},{"@language":"en","@value":"Geochem. J."},{"@language":"ja","@value":"Ｇｅｏｃｈｅｍ．　Ｊ．"}],"dc:publisher":[{"@language":"en","@value":"GEOCHEMICAL SOCIETY OF JAPAN"},{"@language":"ja","@value":"一般社団法人日本地球化学会"}],"prism:publicationDate":"2008","prism:volume":"42","prism:number":"1","prism:startingPage":"61","prism:endingPage":"74"},"reviewed":"false","availableAt":"2008","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=helium%20isotopes","dc:title":"helium isotopes"},{"@id":"https://cir.nii.ac.jp/all?q=noble%20gas","dc:title":"noble gas"},{"@id":"https://cir.nii.ac.jp/all?q=groundwater","dc:title":"groundwater"},{"@id":"https://cir.nii.ac.jp/all?q=hydrology","dc:title":"hydrology"},{"@id":"https://cir.nii.ac.jp/all?q=Osaka%20basin","dc:title":"Osaka basin"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360016862142491392","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"The origin of methane in serpentinite-hosted hyperalkaline hot spring at Hakuba Happo, Japan: Radiocarbon, methane isotopologue and noble gas isotope approaches"}]},{"@id":"https://cir.nii.ac.jp/crid/1360017280629724416","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Groundwaters and deep-seated fluid circulation around Aso Volcano, Southwest Japan, revealed by multivariate statistical analysis of the geochemical data"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283690913949056","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Widespread distribution of ascending fluids transporting mantle helium in the fore-arc region and their upwelling processes: Noble gas and major element composition of deep groundwater in the Kii Peninsula, southwest Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292617909770624","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Nonvolcanic Deep Tremor Associated with Subduction in Southwest Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292618740610432","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Magmatic He distribution around Unzen volcano inferred from intensive investigation of helium isotopes in groundwater"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292620204433536","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A Mantle Helium Component in Circum-Pacific Volcanic Gases: Hakone, the Marianas, and Mt. 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