{"@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/1360004232232203136.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.jaesx.2018.100004"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S2590056018300045?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S2590056018300045?httpAccept=text/plain"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Triassic marine Os isotope record from a pelagic chert succession, Sakahogi section, Mino Belt, southwest Japan"}],"description":[{"notation":[{"@value":"Pelagic cherts preserved in accretionary complexes represent former seafloor sediment that can retain geochemical evidence of paleoceanographic conditions that predate the oldest extant oceanic crust. The ratio of Os isotopes in seawater, in particular, is of wide interest as a source of insight into notable geologic events such as oceanic anoxic events, rapid global warming episodes, and eruption of large igneous provinces, but marine Os isotope records from before 80 Ma are scarce. We present a record of secular variations of marine Os isotope ratios from a thick, continuous succession of Middle and Upper Triassic pelagic chert in the Sakahogi section of the Mino Belt accretionary complex. Initial Os isotope ratios (187Os/188Os) have a wide range in this succession, from 0.197 to 0.813. The variations in this Os record are quite similar to those in the marine Sr isotope record for the same time period, although their amplitudes differ owing to the differing residence times of Os and Sr in the ocean. Together, our results and previous data trace a continuous Os isotope record for ca. 50 Myr starting in Anisian time. We document the following six notable features in the Os record, which also appear in the Sr record, and their interpretation: (1) a negative (unradiogenic) shift associated with euxinia in the latest Anisian reflecting late-stage Siberian Traps eruptions, (2) wide fluctuations from the latest Anisian to Ladinian induced by volcanism and by the late Ladinian humid pulse and volcanism of the Italian Volcanic Center, (3) a continuous decrease in the early Carnian during eruptions of the Wrangellia large igneous province, (4) stable unradiogenic values from the early to early middle Norian associated with a prolonged arid period, (5) a negative spike in the middle Norian associated with the Manicouagan impact event, and (6) a broad rise and fall from the earliest late Norian to the Rhaetian ages, attributed to the Cimmerian-Indosinian orogeny and subsequent volcanism of the Central Atlantic Magmatic Province. Keywords: Re-Os isotope, Triassic, Chert, Sakahogi section, Southwest Japan, Accretionary complex"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420282801194113280","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"10553068"},{"@type":"NRID","@value":"1000010553068"},{"@type":"NRID","@value":"9000019008442"},{"@type":"NRID","@value":"9000347136036"},{"@type":"NRID","@value":"9000311505434"},{"@type":"NRID","@value":"9000338418865"},{"@type":"NRID","@value":"9000412200529"},{"@type":"NRID","@value":"9000370281367"},{"@type":"NRID","@value":"9000412151087"},{"@type":"NRID","@value":"9000412078057"},{"@type":"NRID","@value":"9000345439042"},{"@type":"NRID","@value":"9000412001497"},{"@type":"NRID","@value":"9000338418959"},{"@type":"NRID","@value":"9000338418915"},{"@type":"NRID","@value":"9000368919152"},{"@type":"NRID","@value":"9000345439064"},{"@type":"NRID","@value":"9000292881555"},{"@type":"NRID","@value":"9000345439133"},{"@type":"NRID","@value":"9000338418770"},{"@type":"NRID","@value":"9000345439006"},{"@type":"NRID","@value":"9000411954098"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/t-nozaki"}],"foaf:name":[{"@value":"Tatsuo 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Kato"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004232232203143","@type":"Researcher","foaf:name":[{"@value":"Atsushi Matsuoka"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"25900560"}],"prism:publicationName":[{"@value":"Journal of Asian Earth Sciences: X"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2019-06","prism:volume":"1","prism:startingPage":"100004"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/","http://creativecommons.org/licenses/by-nc-nd/4.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S2590056018300045?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S2590056018300045?httpAccept=text/plain"}],"createdAt":"2018-12-21","modifiedAt":"2019-10-24","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=QE1-996.5","dc:title":"QE1-996.5"},{"@id":"https://cir.nii.ac.jp/all?q=Geology","dc:title":"Geology"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040000781825267712","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"15H02142"},{"@type":"JGN","@value":"JP15H02142"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H02142/"}],"notation":[{"@language":"ja","@value":"顕生代の海水オスミウム同位体変動から読み解く地球表層環境変遷"},{"@language":"en","@value":"Environmental change elucidated from seawater Os isotope in Phanerozoic"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000781907344512","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"16K01322"},{"@type":"JGN","@value":"JP16K01322"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16K01322/"}],"notation":[{"@language":"ja","@value":"希ガス同位体を用いて爆発的噴火の準備過程が熱水活動に与える影響の検討"},{"@language":"en","@value":"Preliminary evaluation of  influence of magmatic process on geo-/hydro-thermal activity prior to explosive eruption using noble gas isotopes"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000781927904384","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"16KK0104"},{"@type":"JGN","@value":"JP16KK0104"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16KK0104/"}],"notation":[{"@language":"ja","@value":"三畳紀天体衝突によるグローバル環境変動の解明（国際共同研究強化）"},{"@language":"en","@value":"Global environmental changes triggered by Late Triassic impact 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