{"@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/1361137046091738240.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.jvolgeores.2008.03.039"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0377027308001376?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0377027308001376?httpAccept=text/plain"}}],"dc:title":[{"@value":"Drilling and logging results of USDP-4 — Penetration into the volcanic conduit of Unzen Volcano, Japan"}],"description":[{"notation":[{"@value":"Abstract   Borehole USDP-4 was drilled into the Unzen volcanic conduit 9 years after its last eruption. The sub-surface mechanism of eruption at Unzen Volcano was investigated by taking cores and by geophysical logging. The drilling operations were carried out in 2003–04, as a joint research program sponsored by the Japanese Government and the International Continental Scientific Drilling Program (ICDP). Borehole USDP-4 was a directional 6-1/4 in. (158.8 mm) borehole drilled from a site located on the northern slope of the volcano at 840 m above sea level, and was designed to penetrate into the conduit at sea level with a final deviation angle of over 70° from vertical and a borehole depth of 1800 m.  An igneous dyke with a high likelihood of being the Unzen conduit was encountered at 1996 m depth and core samples were taken from that location. Chemical analysis of drill cores confirmed the identification of the conduit. Geophysical logging, including recording of gamma ray, resistivity, self-potential, density, neutron porosity, sonic velocity, and temperature suggested an alternation of dykes and flows in rock penetrated during the drilling, and in-hole pictures confirmed the lithologic identifications. Although borehole collapse and high temperature had been expected in the conduit, the actual drilling and logging into the conduit experienced no gas or fluid kick, and the measured temperatures within the dyke were below 200 °C."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381137046091738244","@type":"Researcher","foaf:name":[{"@value":"Sumio Sakuma"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137046091738241","@type":"Researcher","foaf:name":[{"@value":"Tatsuya Kajiwara"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137046091738243","@type":"Researcher","foaf:name":[{"@value":"Setsuya Nakada"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137046091738242","@type":"Researcher","foaf:name":[{"@value":"Kozo Uto"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137046091738240","@type":"Researcher","foaf:name":[{"@value":"Hiroshi Shimizu"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03770273"}],"prism:publicationName":[{"@value":"Journal of Volcanology and Geothermal Research"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2008-07","prism:volume":"175","prism:number":"1-2","prism:startingPage":"1","prism:endingPage":"12"},"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:S0377027308001376?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0377027308001376?httpAccept=text/plain"}],"createdAt":"2008-04-24","modifiedAt":"2025-10-07","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004240202230528","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Failure criteria for porous dome rocks and lavas: a study of Mt. Unzen, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285706207089664","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Intermittent generation of mafic enclaves in the 1991–1995 dacite of Unzen Volcano recorded in mineral chemistry"}]},{"@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/1360848659672057728","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Petrological Architecture of a Magmatic Shear Zone: A Multidisciplinary Investigation of Strain Localisation During Magma Ascent at Unzen Volcano, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/2050588892090759936","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Magnetotelluric transect of Unzen graben, Japan : conductors associated with normal faults"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1016/j.jvolgeores.2008.03.039"},{"@type":"OPENAIRE","@value":"doi_dedup___::48c95230a53625dcbe90ccdc35125e8a"},{"@type":"CROSSREF","@value":"10.1186/s40623-019-1004-z_references_DOI_A44HagiPnteKyvni20F8BhDVF4o"},{"@type":"CROSSREF","@value":"10.5194/se-9-1299-2018_references_DOI_A44HagiPnteKyvni20F8BhDVF4o"},{"@type":"CROSSREF","@value":"10.1007/s00410-017-1335-3_references_DOI_A44HagiPnteKyvni20F8BhDVF4o"},{"@type":"CROSSREF","@value":"10.1029/2008jb005910_references_DOI_A44HagiPnteKyvni20F8BhDVF4o"},{"@type":"CROSSREF","@value":"10.1093/petrology/egz016_references_DOI_A44HagiPnteKyvni20F8BhDVF4o"}]}