{"@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/1390282763132700928.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.20965/jdr.2019.p0766"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"029840607"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/029840607"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I029840607"}},{"identifier":{"@type":"URI","@value":"https://www.fujipress.jp/main/wp-content/themes/Fujipress/phyosetsu.php?ppno=DSSTR001400050007"}},{"identifier":{"@type":"NAID","@value":"130007687214"}}],"dc:title":[{"@language":"en","@value":"Comparative Petrological Studies of 1962 and 1988–1989 Eruptions of Tokachidake Volcano, Japan: A Case Study for Understanding the Relationship Between Eruption Style and Magma Processes"}],"dc:language":"en","description":[{"type":"abstract","notation":[{"@language":"en","@value":"<p>Repeated magmatic eruptions of Tokachidake volcano have caused severe volcanic disasters on three occasions during the 20th century. To prepare for the next eruptive activity, understanding the structure of the magma plumbing system by using petrological analysis of juvenile materials is crucial. Here, we perform petrological analysis of juvenile materials to investigate the difference between two contrasting eruptions in 1962 and 1988–1989, respectively. All these juvenile materials are composed of mafic andesite, which were formed by mixing of olivine-bearing basaltic and pyroxene andesitic magmas. The compositional zonations of olivine phenocrysts in all of these rocks suggest that the injection of the basaltic magma into the andesitic magma occurred several months prior to the 1962 eruption and about six months before the 1988–1989 eruption. In the case of the 1962 activity, the mixed magma rapidly ascended without stagnation from the magma chamber and erupted as a sub-Plinian type. However, the juvenile materials of the 1988–1989 eruptions show distinct petrological features such as higher crystallinity of the matrix, orthopyroxene reaction rims around the olivine, and overgrowth mantle zones around Ti-magnetite phenocrysts. These features suggest that the mixed magma ascended slowly and possibly stagnated at shallower levels prior to eruption. The stagnated magma became a cap rock of the vent system and caused a series of Vulcanian eruptions. These distinct modes of magma ascent can be explained by differences in the magma supply rate. In the case of the 1962 eruption, the volume of magma that erupted in a period of less than 24 h was 7.1 × 10<sup>7</sup> m<sup>3</sup>. On the contrary, 23 explosions occurred over three months of the 1988–1989 activity and generated 1 × 10<sup>5</sup> m<sup>3</sup> of ejecta including juvenile and non-juvenile materials. These large eruption rate differences can be attributed to the distinct ascent rates of the magma between the two eruptive activities.</p>"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1030003658339427076","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"50217684"},{"@type":"NRID","@value":"1000050217684"},{"@type":"CINII_AUTHOR_ID","@value":"DA1834613X"},{"@type":"URI","@value":"https://ci.nii.ac.jp/author/DA1834613X#entity"},{"@type":"URI","@value":"https://viaf.org/viaf/NII%7CDA1834613X"},{"@type":"NRID","@value":"9000002067771"},{"@type":"NRID","@value":"9000019034924"},{"@type":"NRID","@value":"9000254111516"},{"@type":"NRID","@value":"9000351082388"},{"@type":"NRID","@value":"9000396132289"},{"@type":"NRID","@value":"9000403425824"},{"@type":"NRID","@value":"9000406037769"},{"@type":"NRID","@value":"9000392867784"},{"@type":"NRID","@value":"9000413741447"},{"@type":"NRID","@value":"9000408782541"},{"@type":"NRID","@value":"9000392867782"},{"@type":"NRID","@value":"9000017048532"},{"@type":"NRID","@value":"9000402796939"},{"@type":"NRID","@value":"9000411999537"},{"@type":"NRID","@value":"9000409901922"},{"@type":"NRID","@value":"9000409008878"},{"@type":"NRID","@value":"9000412366579"},{"@type":"NRID","@value":"9000414227724"},{"@type":"NRID","@value":"9000400162917"},{"@type":"NRID","@value":"9000406037843"},{"@type":"NRID","@value":"9000018430590"},{"@type":"NRID","@value":"9000410949072"},{"@type":"NRID","@value":"9000403297383"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0052189"}],"foaf:name":[{"@language":"en","@value":"Nakagawa Mitsuhiro"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Natural History Sciences, Graduate School of Science, Hokkaido University"}]},{"@id":"https://cir.nii.ac.jp/crid/1420282801195203584","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"20528260"},{"@type":"NRID","@value":"1000020528260"},{"@type":"NRID","@value":"9000351082389"},{"@type":"NRID","@value":"9000396132323"},{"@type":"NRID","@value":"9000403425825"},{"@type":"NRID","@value":"9000396132316"},{"@type":"NRID","@value":"9000408782542"},{"@type":"NRID","@value":"9000408782652"},{"@type":"NRID","@value":"9000409008877"},{"@type":"NRID","@value":"9000415409627"},{"@type":"NRID","@value":"9000400162918"},{"@type":"NRID","@value":"9000403297384"},{"@type":"NRID","@value":"9000347167152"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/a_matsu"}],"foaf:name":[{"@language":"en","@value":"Matsumoto Akiko"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Natural History Sciences, Graduate School of Science, Hokkaido University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282763132700929","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000403425826"}],"foaf:name":[{"@language":"en","@value":"Kobayashi Kyohei"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Natural History Sciences, Graduate School of Science, Hokkaido University"},{"@language":"en","@value":"Koken Engineering Co., Ltd."}]},{"@id":"https://cir.nii.ac.jp/crid/1410282763132700928","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000403425827"}],"foaf:name":[{"@language":"en","@value":"Wada Keiji"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Earth Science Laboratory, Hokkaido University of Education"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"18812473"},{"@type":"EISSN","@value":"18838030"},{"@type":"NDL_BIB_ID","@value":"000008195934"},{"@type":"ISSN","@value":"18812473"},{"@type":"LISSN","@value":"18812473"}],"prism:publicationName":[{"@language":"ja","@value":"Journal of Disaster Research"},{"@language":"en","@value":"Journal of Disaster Research"},{"@language":"en","@value":"J. Disaster Res."}],"dc:publisher":[{"@language":"en","@value":"Fuji Technology Press Ltd."},{"@language":"ja","@value":"富士技術出版株式会社"}],"prism:publicationDate":"2019-08-01","prism:volume":"14","prism:number":"5","prism:startingPage":"766","prism:endingPage":"779"},"reviewed":"false","url":[{"@id":"http://id.ndl.go.jp/bib/029840607"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I029840607"},{"@id":"https://www.fujipress.jp/main/wp-content/themes/Fujipress/phyosetsu.php?ppno=DSSTR001400050007"}],"availableAt":"2019-08-01","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Tokachidake%20volcano","dc:title":"Tokachidake volcano"},{"@id":"https://cir.nii.ac.jp/all?q=eruption%20style","dc:title":"eruption style"},{"@id":"https://cir.nii.ac.jp/all?q=magma%20mixing","dc:title":"magma mixing"},{"@id":"https://cir.nii.ac.jp/all?q=compositional%20zonation%20of%20olivine","dc:title":"compositional zonation of olivine"},{"@id":"https://cir.nii.ac.jp/all?q=mode%20of%20magma%20ascent","dc:title":"mode of magma ascent"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050869456407446784","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Permeability-control on volcanic hydrothermal system : case study for Mt. Tokachidake, Japan, based on numerical simulation and field observation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002215319291392","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Short time scales of magma-mixing processes prior to the 2011 eruption of Shinmoedake volcano, Kirishima volcanic group, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360013168730906112","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Olivine Melt Inclusion Constraints on Some Intensive Properties of Subvolcanic Crystal Mushes and Their Evolution through Boundary Layer Fractionation in Northern Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292619342066816","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A study of the Taisho lahar generated by the 1926 eruption of Tokachidake Volcano, central Hokkaido, Japan, and implications for the generation of cohesive lahars"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574095707925120","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Olivine-melt and orthopyroxene-melt equilibria"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848657272713472","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Syneruptive deep magma transfer and shallow magma remobilization during the 2011 eruption of Shinmoe-dake, Japan—Constraints from melt inclusions and phase equilibria experiments"}]},{"@id":"https://cir.nii.ac.jp/crid/1361137046107922688","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Experimental investigations of the role of H2O in calc-alkaline differentiation and subduction zone magmatism"}]},{"@id":"https://cir.nii.ac.jp/crid/1361699994522581632","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Effects of subvolcanic hydrothermal systems on edifice collapses and phreatic eruptions at Tokachidake volcano, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1361699996242235136","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Experimental study of a low-alkali tholeiite at 1–5 kbar: optimal condition for the crystallization of high-An plagioclase in hydrous arc tholeiite"}]},{"@id":"https://cir.nii.ac.jp/crid/1361981469829448192","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Continuous mixing of crystal mush and replenished magma in the ongoing Unzen eruption"}]},{"@id":"https://cir.nii.ac.jp/crid/1362262944052704384","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Olivine-liquid equilibrium"}]},{"@id":"https://cir.nii.ac.jp/crid/1363107370155102720","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Olivine growth rates in a tholeiitic basalt: An experimental study of melt inclusions in plagioclase"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951793871032064","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"An experimental study of magnetite-titanomagnetite interdiffusion"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233269831201024","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Fe–Mg diffusion in olivine I: experimental determination between 700 and 1,200°C as a function of composition, crystal orientation and oxygen fugacity"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233270911640320","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Formation and evolution of silicic magma plumbing system: Petrology of the volcanic rocks of Usu volcano, Hokkaido, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681193549056","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"1962 eruption of Tokachi-dake, Hokkaido"},{"@value":"十勝岳1962年の噴火"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2007344404"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I029840607"},{"@type":"CROSSREF","@value":"10.20965/jdr.2019.p0766"},{"@type":"CIA","@value":"130007687214"},{"@type":"CROSSREF","@value":"10.1093/petrology/egac016_references_DOI_D3g6q5uoIe8P3OvCHHvzjTFyifZ"}]}