{"@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/1362262945790484864.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.jvolgeores.2004.12.005"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0377027304004147?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0377027304004147?httpAccept=text/plain"}},{"identifier":{"@type":"NAID","@value":"30004771377"}}],"dc:title":[{"@value":"Hydrothermal system beneath Aso volcano as inferred from self-potential mapping and resistivity structure"}],"description":[{"notation":[{"@value":"Abstract   We conducted self-potential (SP) surveys sequentially from part to part over the central cones of Aso volcano since August 1998 by December 2001. The compiled SP map revealed large SP anomalies on the central cones. The main feature of the SP map is a ‘W-shaped’ profile along the NS-transect over the central cones. It is probable that this characteristic SP profile is produced by the combination of hydrothermal upwelling in the middle and topographic effect. A positive anomaly showing a large concentric pattern has appeared after correcting the topographic effect.  To evaluate this SP anomaly, we implemented a numerical code that calculates electric potential produced by arbitrarily positioned current sources and sinks in any three-dimensional resistivity structure. A layered structure obtained from a time-domain electromagnetic (TDEM) field experiment was used for the resistivity model. The estimated current source is 300 A, being located in a conductive layer around the sea level. Meanwhile, sinks were estimated to sit on a circular area corresponding to the marginal part of the conductive layer.  Water and heat budget study gives a lower limit of water mass transfer from depth to the bottom of the crater lake of Nakadake. This value was used to estimate the equivalent current in either case of electro-kinetic (EK) [Mizutani, H., Ishido, T., 1976. A new interpretation of magnetic field variation associated with the Matsushiro earthquakes, J. Geomag. Geoelectr., 28, 179–188.] or rapid fluid disruption (RFD) process [Johnston, M.J.S., Byerlee, J.D., Lockner, D., 2001. Rapid fluid disruption: A source for self-potential anomalies on volcanoes, J. Geophys. Res. 106(B3), 4327-4335.]. This comparison suggests that the former process is preferable to explain the observed SP anomaly. From these results we infer a large-scale hydrothermal system beneath the central cones of Aso volcano, in which the fluid flow initiates from the surrounding area, converging to the central vent to transport the heat and materials up to the crater lake of Nakadake through a vapor-filled conduit."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382262945790484864","@type":"Researcher","foaf:name":[{"@value":"Hideaki Hase"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262945790484865","@type":"Researcher","foaf:name":[{"@value":"Takeshi Hashimoto"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262945790484867","@type":"Researcher","foaf:name":[{"@value":"Shin'ya Sakanaka"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262945790484866","@type":"Researcher","foaf:name":[{"@value":"Wataru Kanda"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262945790484868","@type":"Researcher","foaf:name":[{"@value":"Yoshikazu Tanaka"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03770273"}],"prism:publicationName":[{"@value":"Journal of Volcanology and Geothermal Research"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2005-05","prism:volume":"143","prism:number":"4","prism:startingPage":"259","prism:endingPage":"277"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S0377027304004147?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0377027304004147?httpAccept=text/plain"}],"createdAt":"2005-02-21","modifiedAt":"2019-01-28","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050587981431089408","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Crustal magma pathway beneath Aso caldera inferred from three-dimensional electrical resistivity structure"},{"@value":"Crustal magma pathway beneath Aso caldera inferred from three‐dimensional electrical resistivity structure"},{"@value":"Crustal magma pathway beneath Aso caldera inferred from 3-D electrical resistivity structure"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004239487438336","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Thermal Activity Monitoring of an Active Volcano Using Landsat 8/OLI-TIRS Sensor Images: A Case Study at the Aso Volcanic Area in Southwest Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285707146762240","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Thermal activity within the western-slope geothermal zone of Aso volcano, Japan: Development of a new thermal area"}]},{"@id":"https://cir.nii.ac.jp/crid/1360294643802130176","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Hydrothermal and magmatic contributions to surface waters in the Aso caldera, southern Japan: Implications for weathering processes in volcanic areas"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183238403072","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Groundwater flow and hydrothermal systems within volcanic edifices: Delineation by electric self‐potential and magnetotellurics"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204303007488","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Current Topics in Surveys of Electrical Conductivity Structure with the Aid of the Magnetotelluric Method"},{"@language":"ja","@value":"MT法による電気伝導度構造研究の現状"},{"@language":"ja-Kana","@value":"MTホウ ニ ヨル デンキ デンドウド コウゾウ ケンキュウ ノ ゲンジョウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681471964160","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Interpretation of self-potential on Kaimondake volcano in consideration of zeta potential variation of the volcanic rocks"},{"@language":"ja","@value":"ゼータ電位を考慮した開聞岳の自然電位解釈"},{"@language":"ja-Kana","@value":"ゼータ デンイ オ コウリョシタ カイモンダケ ノ シゼン デンイ カイシャク"}]},{"@id":"https://cir.nii.ac.jp/crid/1571417125362923776","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"インドネシア・中央ジャワ Merapi 火山の浅部地温異常と熱構造"},{"@language":"en","@value":"Shallow Ground Temperature Anomaly and Thermal Structure of Merapi Volcano, Central Java, Indonesia"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942185021568","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Magnetotelluric and temperature monitoring after the 2011 sub-Plinian 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