{"@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/1360574096340373376.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.gca.2006.02.027"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0016703706001256?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0016703706001256?httpAccept=text/plain"}},{"identifier":{"@type":"NAID","@value":"30007704062"}}],"dc:title":[{"@value":"Geochemical evolution of a shallow magma plumbing system during the last 500 years, Miyakejima volcano, Japan: Constraints from 238U–230Th–226Ra systematics"}],"description":[{"notation":[{"@value":"Abstract   In order to unravel magma processes and the geochemical evolution of shallow plumbing systems beneath active volcanoes, we investigated U-series disequilibria of rocks erupted over the past 500 years (1469–2000 AD) from Miyakejima volcano, Izu arc, Japan. Miyakejima volcanic rocks show 238U–230Th–226Ra disequilibria with excess 238U and 226Ra, due to the addition of slab-derived fluids to the mantle wedge. Basaltic bombs of the 2000 AD eruption have the lowest (230Th/232Th) ratio compared to older Miyakejima eruptives, yielding the youngest 238U–230Th model age of 2 kyr. This reinforces our previous model that fluid release from the slab and subsequent magma generation in the mantle wedge beneath Miyakejima occur episodically on a several-kyr timescale. In the last 500 years, Miyakejima eruptives show: (1) a vertical trend in a (230Th/232Th)–(238U/232Th) diagram and (2) a positive linear correlation in a (226Ra/230Th)0 − 1/230Th diagram, which is also observed in lavas from some of the single eruptions (e.g., 1940, 1962, and 1983 AD). The variations cannot be produced by simple fractional crystallization in a magma chamber with radioactive decay of 230Th and 226Ra, but it is possibly produced by synchronous generation of melts in the mantle wedge with different upwelling rate or addition of multiple slab-derived fluids. A much more favorable scenario is that some basaltic magmas were intermittently supplied from deep in the mantle and injected into the crust, subsequently modifying the original magma composition and producing variations in (230Th/232Th) and (226Ra/230Th)0 ratios via assimilation and fractional crystallization (AFC). The assimilant of the AFC process would be a volcanic edifice of previous Miyakejima magmatism. Due to the relatively short timescales involved, the interaction between the assimilant and recent Miyakejima magmatism has not been recorded by the Sr–Nd–Pb isotopic systems. In such cases, Th isotopes and (226Ra/230Th) ratio are excellent geochemical tracers of magmatic evolution."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380574096340373376","@type":"Researcher","foaf:name":[{"@value":"Tetsuya Yokoyama"}]},{"@id":"https://cir.nii.ac.jp/crid/1380574096340373379","@type":"Researcher","foaf:name":[{"@value":"Takeshi Kuritani"}]},{"@id":"https://cir.nii.ac.jp/crid/1380574096340373377","@type":"Researcher","foaf:name":[{"@value":"Katsura Kobayashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380574096340373378","@type":"Researcher","foaf:name":[{"@value":"Eizo Nakamura"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00167037"}],"prism:publicationName":[{"@value":"Geochimica et Cosmochimica Acta"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2006-06","prism:volume":"70","prism:number":"11","prism:startingPage":"2885","prism:endingPage":"2901"},"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:S0016703706001256?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0016703706001256?httpAccept=text/plain"}],"createdAt":"2006-05-03","modifiedAt":"2025-09-16","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360021391858698496","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Geochemical constraints on the evolution of the magmatic system leading to catastrophic eruptions at Aira Caldera, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360025429441614592","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Origin and Evolution of the Holocene Magmatic System at Sakurajima Volcano, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360290617903440384","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Magma plumbing system for the Millennium Eruption at Changbaishan volcano, China: Constraints from whole-rock U–Th disequilibrium"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565165869551616","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Migrating shoshonitic magmatism tracks Izu–Bonin–Mariana intra-oceanic arc rift propagation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565165890505472","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Geochemical evolution of historical lavas from Askja Volcano, Iceland: Implications for mechanisms and timescales of magmatic differentiation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567182004458752","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Evaluation of the applicability of acid leaching for the 238U–230Th internal isochron method"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846640867215616","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Timescales of magma differentiation from basalt to andesite beneath Hekla Volcano, Iceland: Constraints from U-series disequilibria in lavas from the last quarter-millennium flows"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848658216746624","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Making and breaking an island arc: A new perspective from the Oligocene Kyushu‐Palau arc, Philippine Sea"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848660450112384","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Investigating the Influence of Non‐Spectral Matrix Effects in the Determination of Twenty‐Two Trace Elements in Rock Samples by <scp>ICP</scp>‐<scp>QMS</scp>"}]},{"@id":"https://cir.nii.ac.jp/crid/1361131416795292928","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"An origin of the along-arc compositional variation in the Izu-Bonin arc system"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204155736576","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"238U-230Th-226Ra Radioactive Disequilibria in the Lava Flows of the 1986 Eruption from Izu-Oshima Volcano, Japan"},{"@language":"ja","@value":"伊豆大島火山1986年溶岩流の <SUP>238</SUP>U-<SUP>230</SUP>Th-<SUP>226</SUP>Ra放射非平衡"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204305177088","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"ウラン系列短寿命核種を用いた地殻下におけるマグマ進化の時間スケールの解明 : 研究の現状と課題"},{"@language":"en","@value":"Timescales of magmatic evolution in crustal magma chambers constrained from U-series radioactive disequilibria : A brief review"},{"@language":"ja-Kana","@value":"ウラン ケイレツ タンジュミョウ カクシュ オ モチイタ チカクカ ニ オケル マグマ シンカ ノ ジカン スケール ノ カイメイ ケンキュウ ノ ゲンジョウ ト カダイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679526629248","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"238U-230Th radioactive disequilibrium in the northern Izu arc: (230Th/232Th) in the sub-arc mantle"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942153249792","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Evolution of the magma plumbing system of Miyakejima volcano with periodic recharge of basaltic magmas"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1016/j.gca.2006.02.027"},{"@type":"CIA","@value":"30007704062"},{"@type":"OPENAIRE","@value":"doi_dedup___::b37794125a1fdd9e9817ba4f53aa76ab"},{"@type":"CROSSREF","@value":"10.1016/j.gca.2010.10.001_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1186/s40623-022-01577-7_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1016/j.lithos.2023.107208_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1093/petrology/egaf010_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1016/j.chemgeo.2014.12.025_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1016/j.lithos.2020.105564_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1016/j.gsf.2019.12.004_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1016/j.epsl.2010.03.016_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1029/2010gc003440_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1111/ggr.12147_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.2343/geochemj.42.461_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.3769/radioisotopes.58.13_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"},{"@type":"CROSSREF","@value":"10.1016/j.gca.2010.10.009_references_DOI_EkMHAcGcT3nEHwbn5gOh0hDB12h"}]}