{"@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/1363670320675948288.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.jvolgeores.2005.02.002"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0377027305000594?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0377027305000594?httpAccept=text/plain"}}],"dc:title":[{"@value":"Subvolcanic hydrothermal systems: Implications from hydrothermal minerals in hydrovolcanic ash"}],"description":[{"notation":[{"@value":"Abstract   Hydrothermal minerals, including silica, 7 A-kaolin minerals, pyrophyllite, di-octahedral smectite, and alunite in ash of phreatic/phreatomagmatic eruptions from eight volcanoes in Northeastern Japan were derived from subvolcanic hydrothermal systems. Comparison with internal structures of some extinct volcanoes indicates that hydrovolcanic ash was derived from cores of stratocones at depths of 250–1500 m or greater. The hydrothermal mineral assemblages are similar to those of acid–sulfate type alteration around hydrothermal ore deposit districts. They represent hydrothermal temperatures up to 340 °C. Relative abundance of Ca–K–Na alunite is not correlated with other acid–sulfate minerals because its precipitation reflects only fluid composition, whereas hydrous aluminosilicate and silica minerals reflect base-ion leaching by acidic fluids. Temporal variations in composition and abundances of mineral assemblages at some volcanoes imply the evolution of acid–sulfate alteration zones."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004240150081667","@type":"Researcher","foaf:name":[{"@value":"T. Ohba"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670320675948288","@type":"Researcher","foaf:name":[{"@value":"Y. Kitade"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03770273"}],"prism:publicationName":[{"@value":"Journal of Volcanology and Geothermal Research"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2005-07","prism:volume":"145","prism:number":"3-4","prism:startingPage":"249","prism:endingPage":"262"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S0377027305000594?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0377027305000594?httpAccept=text/plain"}],"createdAt":"2005-04-14","modifiedAt":"2019-01-27","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050564288373847296","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Imaging the hydrothermal system beneath the Jigokudani valley, Tateyama volcano, Japan: Implications for structures controlling repeated phreatic eruptions from an audio-frequency magnetotelluric survey"}]},{"@id":"https://cir.nii.ac.jp/crid/1050845763137851776","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Lahar characteristics as a function of triggering mechanism at a seasonally snow-clad volcano: contrasting lahars following the 2014 phreatic eruption of Ontake Volcano, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1050858209209054464","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Hydrothermal Aluminum-Phosphate-Sulfates in Ash from the 2014 Hydrothermal Eruption at Ontake Volcano, Central Honshu, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004232342644864","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Resistivity structure and geochemistry of the Jigokudani Valley hydrothermal system, Mt. 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