{"@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/1360855570935026432.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1007/bf01162927"}},{"identifier":{"@type":"URI","@value":"http://link.springer.com/content/pdf/10.1007/BF01162927.pdf"}},{"identifier":{"@type":"URI","@value":"http://link.springer.com/article/10.1007/BF01162927/fulltext.html"}},{"identifier":{"@type":"URI","@value":"http://link.springer.com/content/pdf/10.1007/BF01162927"}},{"identifier":{"@type":"NAID","@value":"30002004316"}}],"dc:title":[{"@value":"The relationships between drastic changes in Sr isotope ratios of magma sources beneath the NE Japan arc and the spreading of the Japan sea back-arc basin"}],"description":[{"notation":[{"@value":"Based on Sr isotopic data for Tertiary and Quaternary basaltic rocks from the NE Japan arc, relationships are discussed between the temporal variation of magma source characteristics and the opening of the Japan Sea. The basaltic rocks from the trench side and from the transitional zone show initial87Sr/86Sr ratios (Sri ratios) in the range of 0.70411–0.70546 but no temporal variation in Sri ratios. The back-arc side basaltic rocks with ages of 29.8 to ≈ 15 Ma have Sri ratios similar to those of the trench side and the transitional zone, and these values also show no temporal change. In contrast, the basaltic rocks from the back-arc side, with ages younger than ≈ 15 Ma, show significantly lower Sri ratios (0.70396 to 0.70290), which are slightly higher than those of N-type MORB. These Sr isotopic features may imply that at least before ≈ 15 Ma the magma source regions (the sub-continental mantle) beneath the NE Japan arc had an enriched chemical character and that after ≈ 15 Ma, the magma sources for volcanic rocks from the back-arc side show a drastic change in Sr isotopic character, from an enriched nature to a depleted one. The depleted magmas may have been formed as a result of injection of depleted asthenosphere (or of a depleted mantle diapir) into the subcontinental mantle under the back-arc side of the NE Japan arc, during the spreading of the Japan Sea back-arc basin. The middle Miocene basaltic rocks from the back-arc side are characterized by lower contents of LIL elements such as K2O and Rb compared with those from the trench side, suggesting that during the middle Miocene (syn-opening stage of the Japan Sea) the degree of partial melting may have been higher in the back-arc side mantle than in the trench side mantle. High degree of partial melting in the back-arc side mantle can be attributed to an increasing geothermal gradient in the mantle due to the injection of hot asthenosphere. This injection might also have caused the melting of the lower crust from which the voluminous middle Miocene acidic volcanics in the back-arc side and transitional zone may have been produced."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1584231875815084416","@type":"Researcher","foaf:name":[{"@value":"K. Shuto"}]},{"@id":"https://cir.nii.ac.jp/crid/1380855570935026437","@type":"Researcher","foaf:name":[{"@value":"J. Ohki"}]},{"@id":"https://cir.nii.ac.jp/crid/1380855570935026439","@type":"Researcher","foaf:name":[{"@value":"H. Kagami"}]},{"@id":"https://cir.nii.ac.jp/crid/1380855570935026434","@type":"Researcher","foaf:name":[{"@value":"M. Yamamoto"}]},{"@id":"https://cir.nii.ac.jp/crid/1380855570935026433","@type":"Researcher","foaf:name":[{"@value":"N. Watanabe"}]},{"@id":"https://cir.nii.ac.jp/crid/1380855570935026435","@type":"Researcher","foaf:name":[{"@value":"K. Yamamoto"}]},{"@id":"https://cir.nii.ac.jp/crid/1380855570935026432","@type":"Researcher","foaf:name":[{"@value":"N. Anzai"}]},{"@id":"https://cir.nii.ac.jp/crid/1380855570935026438","@type":"Researcher","foaf:name":[{"@value":"T. Itaya"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"09300708"},{"@type":"EISSN","@value":"14381168"}],"prism:publicationName":[{"@value":"Mineralogy and Petrology"}],"dc:publisher":[{"@value":"Springer Science and Business Media LLC"}],"prism:publicationDate":"1993","prism:volume":"49","prism:number":"1-2","prism:startingPage":"71","prism:endingPage":"90"},"reviewed":"false","dc:rights":["http://www.springer.com/tdm"],"url":[{"@id":"http://link.springer.com/content/pdf/10.1007/BF01162927.pdf"},{"@id":"http://link.springer.com/article/10.1007/BF01162927/fulltext.html"},{"@id":"http://link.springer.com/content/pdf/10.1007/BF01162927"}],"createdAt":"2005-02-03","modifiedAt":"2019-04-30","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004234741767808","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Petrogenesis of Middle Miocene Primitive Basalt, Andesite and Garnet-bearing Adakitic Rhyodacite from the Ryozen Formation: Implications for the Tectono-magmatic Evolution of the NE Japan Arc"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004234741829888","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Across-arc Variations in Geochemistry of Oligocene to Quaternary Basalts from the NE Japan Arc: Constraints on Source Composition, Mantle Melting and Slab Input Composition"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285707282785408","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Miocene-Pliocene mantle depletion event in the northern Fossa Magna, western NE Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285710723504128","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Chemical and Isotopic Characteristics of the <scp>K</scp>uroko‐Forming Volcanism"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846640992036864","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Repeated magmatism at 34Ma and 23-20Ma producing high magnesian adakitic andesites and transitional basalts on southern Okushiri Island, NE Japan arc"}]},{"@id":"https://cir.nii.ac.jp/crid/1361131417092201472","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Geochemical and mineralogical studies of ca.12 Ma hydrothermal manganese-rich rocks in the Hokuroku district in Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825895265517312","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@value":"K–Ar ages of the basaltic rocks from Far East Russia: Constraints on the tectono‐magmatism associated with the Japan Sea opening"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204265420032","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"北海道の新生代鉱床区における熱水活動履歴(<特集>堆積盆の熱履歴を探る(その1))"},{"@language":"en","@value":"Cenozoic hydrothermal activity in the metallogenic province, Hokkaido, Japan(<Special issue>Thermal histories of sedimentary basin: technique and case studies(Part1))"},{"@value":"北海道の新生代鉱床区における熱水活動履歴"},{"@language":"ja-Kana","@value":"ホッカイドウ ノ シンセイダイ コウショウク ニ オケル ネッスイ カツドウ リレキ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204266210944","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"ユーラシア大陸北東縁辺部の新生代火山活動 ―北海道周辺火山岩の岩石学的性質とテクトニクスとの関連―(<特集>北西大平洋縁辺地域の新生界)"},{"@language":"en","@value":"Cenozoic volcanism of northeastern Eurasian continental margin : relationship between magmatism and back-arc basin opening at vicinity of Hokkaido(<Special issue>The Cenozoic of the Northwestern Pacific margin)"},{"@value":"ユーラシア大陸北東縁辺部の新生代火山活動--北海道周辺火山岩の岩石学的性質とテクトニクスとの関連"},{"@language":"ja-Kana","@value":"ユーラシア タイリク ホクトウ エンペンブ ノ シンセイダイ カザン カツドウ ホッカイドウ シュウヘン カザンガン ノ ガンセキガクテキ セイシツ ト テクトニクス ト ノ カンレン"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206234759424","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Geology of Hachimantai volcanic field and temporal. Spatial variation of the magma compositions."},{"@language":"ja","@value":"八幡平火山群の地質とマグマ組成の時間　　空間変化"},{"@value":"Geology of Hachimantai volcanic field and temporal-spatial variation of the magma compositions [in Japanese with English abstract]"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206235561472","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"An AFC (assimilation and fractional crystallization) process as the petrogenesis of andesites from the Pliocene Myojin-iwa Formation, the back-arc side of the Northeast Japan. Combined major-and trace-element and Sr-Nd isotope constraints."},{"@language":"ja","@value":"東北日本背弧側に産する鮮新統明神岩層の安山岩類の成因-AFCプロセス- : 主要・微量元素組成およびSr・Nd同位体組成からの制約"},{"@language":"ja-Kana","@value":"AFC assimilation and fractional crystallization process as the petrogenesis of andesites from the Pliocene Myojin iwa Formation the back arc side of the Northeast Japan combined major and trace element and Sr Nd isotope Constraints"},{"@value":"An AFC (assimilation and fractional crystallization) as the petrogenesis of andesites from the Pliocene Myojin-iwa Formation, the back-arc side of the Northeast Japan: combined major- and trace-element and Sr–Nd isotope constraints"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206524319744","@type":"Article","relationType":["isReferencedBy","isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Transition of magmatic composition reflecting an evolution of rifting activity. A case study of the Akita-Yamagata basin in Early to Middle Miocene, Northeast Honshu, Japan."},{"@language":"ja","@value":"リフト活動の変遷に伴うマグマ組成の変化　　東北本州，前～中期中新世の秋田‐山形堆積盆地における例"},{"@value":"リフト活動の変遷に伴うマグマ組成の変化--東北本州,前～中期中新世の秋田-山形堆積盆地における例"},{"@language":"ja-Kana","@value":"リフト カツドウ ノ ヘンセン ニ トモナウ マグマ ソセイ ノ ヘンカ トウホク ホンシュウ ゼン チュウキ チュウシンセイ ノ アキタ ヤマガタ タイセキ ボンチ ニ オケル レイ"},{"@value":"Transition of magmatic composition reflecting an evolution of rifting activity—a case study of the Akita–Yamagata basin in Early to Middle Miocene, Northeast Honshu, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206545665920","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Petrology and geochemistry of Miocene igneous rocks on Rebun Island, northern Hokkaido, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206546056320","@type":"Article","relationType":["isReferencedBy","isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Petrogenesis of the tholeiitic basalt, calc-alkaline basaltic andesite and high magnesian andesite lava succession of the Oligo-Miocene Anamizu Formation in northeastern Noto Peninsula, central Japan."}]},{"@id":"https://cir.nii.ac.jp/crid/1390001288117283584","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Stratigraphic framework of the Green Tuff successions in Japan with reference to the associated geologic events"},{"@language":"ja","@value":"グリーンタフの層序学的枠組みと地質学的事象"},{"@language":"ja-Kana","@value":"グリーンタフ ノ ソウ ジョガクテキ ワクグミ ト チシツガクテキ ジショウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390003825187349120","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Sr isotope ratios and diatom ages of the Neogene carbonate concretions in Akita and northern Yamagata areas, Northeast Japan"},{"@language":"ja","@value":"秋田および山形北部地域の新第三系炭酸塩コンクリーションのSr同位体比と珪藻化石年代"},{"@language":"ja-Kana","@value":"アキタ オヨビ ヤマガタ ホクブ チイキ ノ シン ダイサンケイ タンサンエン コンクリーション ノ Sr ドウイタイヒ ト ケイソウ カセキ ネンダイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679037229952","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Interaction between seawater and Miocene volcanic rocks recovered by deep drilling in the Niigata oil and gas fields, northeast Japan-Sr and Nd isotopic evidence from oil and gas-bearing volcanic rocks-"},{"@language":"ja","@value":"新潟油・ガス田地域の中新世火山岩と海水の相互作用―石油・天然ガスを胚胎する火山岩のＳｒおよびＮｄ同位体比―"},{"@language":"ja-Kana","@value":"ニイガタ ユ ガスデン チイキ ノ チュウシンセイ カザンガン ト カイスイ ノ ソウゴ サヨウ セキユ テンネン ガス オ ハイタイスル カザンガン ノ Sr オヨビ Nd ドウイタイヒ"},{"@value":"Interaction between seawater and Miocene volcanic rocks recovered by deep drilling in the Niigata oil and gas fields, northeast Japan—Sr and Nd isotopic evidence from oil and gas-bearing volcanic rocks"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679037316352","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Miocene bimodal volcanism in the Niigata oil and gas fields, northeast Japan. With special reference to the spreading of the back-arc basin."},{"@value":"新潟油・ガス田地域における中新世バイモーダル火山活動　背弧海盆拡大との関連"},{"@language":"ja-Kana","@value":"ニイガタユ ガスデン チイキ ニ オケル チュウシンセイ バイモーダル カザン"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681210428288","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"K-Ar ages and geochemistry of the Cenozoic volcanic rocks from Hamamasu area, central Hokkaido, Japan-temporal changes in magma geochemistry resulted from tectonics of arc-arc junction."},{"@value":"中央北海道，浜益地域の新生代火山岩類のＫ‐Ａｒ年代と地球化学　島弧会合部テクトニクスに起因するマグマ組成の時間変化"},{"@language":"ja-Kana","@value":"チュウオウ ホッカイドウ ハママス チイキ ノ シンセイダイ カザンガンルイ ノ K Ar ネンダイ ト チキュウ カガク トウコ カイゴウブ テクトニクス ニ キイン スル マグマ ソセイ ノ ジカン ヘンカ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681211028736","@type":"Article","relationType":["isReferencedBy","isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Petrological characteristics of basalts from the Miocene Nanamagari Formation in Ishikawa Prefecture. Low-K basalts from the back-arc side of central Japan."},{"@language":"ja","@value":"石川県の中新統七曲層中に産する玄武岩の岩石学的特徴　背弧側地域の低カリウム玄武岩"},{"@language":"ja-Kana","@value":"イシカワケン ノ チュウシントウ ナナマガリソウチュウ ニ サンスル ゲンブガ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681212188032","@type":"Article","relationType":["isReferencedBy","isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Petrochemistry and tectonic setting of the Tertiary volcanic rocks from North Sikhote Alin."},{"@language":"ja","@value":"北シホテアリンの新生代火山岩の岩石化学"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681214381440","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"K-Ar ages and petrology of the Takinoue stage volcanic rocks in central Hokkaido, Japan: Geochemistry of volcanic rocks that form a shallow reservoir in the Yufutsu Oil and Gas Field"},{"@language":"ja","@value":"北海道中央部に分布する滝の上期火山岩類の放射年代と岩石学的特徴－勇払油ガス田の浅層貯留層を構成する火山岩の岩石化学的検討－"},{"@language":"ja-Kana","@value":"ホッカイドウ チュウオウブ ニ ブンプ スル タキノウエ キ カザンガンルイ ノ ホウシャ ネンダイ ト ガンセキガクテキ トクチョウ ユウフツユ ガスデン ノ センソウ チョリュウソウ オ コウセイ スル カザンガン ノ ガンセキ カガクテキ ケントウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681214477824","@type":"Article","relationType":["isReferencedBy","isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Magmatological approach to subduction zone processes: towards a comprehensive understanding of arc evolution"},{"@language":"ja","@value":"総説 : 沈み込み帯のマグマ学—島弧進化の包括的理解を目指して—"},{"@value":"沈み込み帯のマグマ学:島弧進化の包括的理解を目指して"},{"@language":"ja-Kana","@value":"シズミ コミ タイ ノ マグマガク トウ コ シンカ ノ ホウカツテキ リカイ オ メザシテ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681473380352","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Evolution of Late Cenozoic Magmatism in the NE Honshu Arc and Its Relation to the Crust-Mantle Structures"},{"@value":"後期新生代，東北本州弧における火成活動史と地殻・マントル構造"},{"@language":"ja-Kana","@value":"コウキ シンセイダイ トウホクホンシュウ コ ニ オケル カセイカツドウシ ト チカク マントル コウゾウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681502729984","@type":"Article","relationType":["isReferencedBy","isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Petrology of Late Oligocene volcanic rocks from southern part of central Hokkaido, Japan-Implication for incipient volcanism of back-arc rift-"},{"@language":"ja","@value":"中央北海道南部の後期漸新世火山岩の岩石学的検討‐背弧海盆拡大の初期火山活動‐"},{"@value":"中央北海道南部の後期漸新世火山岩の岩石学的検討 : 背弧海盆拡大の初期火山活動"},{"@language":"ja-Kana","@value":"チュウオウ ホッカイドウ ナンブ ノ コウキゼンシン セイ カザンガン ノ ガンセキガクテキ ケントウ : ハイ コカイボン カクダイ ノ ショキ カザン カツドウ"},{"@value":"Petrology of Late Oligocene volcanic rocks from southern part of central Hokkaido, Japan—Implication for incipient volcanism of back-arc rift—"}]},{"@id":"https://cir.nii.ac.jp/crid/1390286981375202688","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Zircon U-Pb age of greenish tuff deposit distributed in the eastern base of Yotei Volcano, 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