{"@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/1390282679528428032.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2343/geochemj.28.473"}},{"identifier":{"@type":"COI","@value":"1:CAS:528:DyaK2MXkt1Giurk%3D"}},{"identifier":{"@type":"NAID","@value":"130003743314"}}],"dc:title":[{"@language":"en","@value":"Middle Miocene bimodal volcanism by asthenospheric upwelling: Sr and Nd isotopic evidence from the back-arc region of the Northeast Japan arc."}],"dc:language":"en","description":[{"type":"abstract","notation":[{"@language":"en","@value":"On the basis of Sr and Nd isotopic data for Tertiary to Quaternary volcanic rocks, the isotopic characteristics of the upper mantle beneath the NE Japan arc and genesis of Middle Miocene bimodal volcanism are discussed. Basaltic rocks from the back-arc side, erupted from 35 Ma to present, can be divided into two different groups based on initial Sr isotopic ratios (Sr<i>i</i>), initial εNd values, and ages. One group has higher Sr<i>i</i> ratios (∼0.7040–∼0.7058) and lower εNd values (∼0–∼+3) than the other (∼0.7029–∼0.7040 and ∼+3–∼+8). Basaltic activity of the high Sr<i>i</i> group took place continually from 30 to 10 Ma, whereas activity of the other group occurred mainly in two periods; i.e., at around 34–35 Ma and after –15 Ma. A similar pattern is also observed in basaltic rocks from the transitional zone and the trench side, where basaltic activity characterized by higher Sr<i>i</i> ratios took place continuously during <i>ca.</i> 15–0 Ma, whereas eruption of lower Sr<i>i</i> basalts occurred at around 15 Ma and after about 3 Ma. One interpretation of these features is that the sub-continental mantle beneath the NE Japan arc may be layered; comprising upper isotopically undepleted (Sr<i>i</i> = ∼0.7040–∼0.7058, εNd = ∼0–∼+3) and lower depleted (Sr<i>i</i> = ∼0.7029–∼0.7040, εNd = ∼+3–∼+8) parts. Basaltic magmas with an undepleted isotopic signature are considered to have formed from the upper layer, while those with a depleted isotopic signature are from the lower layer. The sharp increase in basaltic activity with a depleted isotopic character after –15 Ma in the back-arc side may be due to the upwelling of hot depleted layer from a deeper region in the mantle (asthenosphere) to the upper undepleted layer beneath the back-arc side of the NE Japan arc during the opening of the Japan Sea. This asthenospheric upwelling might have also caused melting of the lower crust to produce the Middle Miocene acidic volcanic rocks in the back-arc side and the transitional zone. Rhyolitic rocks from Tobishima Island and the Tsugawa-Tadami area in the back-arc side show significantly higher Sr<i>i</i> ratios (0.7055–0.7072) and lower εNd values (∼0–∼-5) than the associated basaltic rocks, indicating a lower crustal origin for these rhyolitic rocks. On the other hand, the similarity in εNd values (∼+4) of dolerites and rhyolites from the Kakudate-Rokugo area of the transitional zone suggests derivation from a common mantle source with an isotopic signature between the upper undepleted and lower depleted layers."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410001205536636418","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000004606076"}],"foaf:name":[{"@language":"en","@value":"Ohki Jun'ichi"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Graduate School of Science and Technology, Niigata University"}]},{"@id":"https://cir.nii.ac.jp/crid/1030003658373449218","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"50143748"},{"@type":"NRID","@value":"1000050143748"},{"@type":"CINII_AUTHOR_ID","@value":"DA01013868"},{"@type":"URI","@value":"https://ci.nii.ac.jp/author/DA01013868#entity"},{"@type":"URI","@value":"https://viaf.org/viaf/NII%7CDA01013868"},{"@type":"NRID","@value":"9000004609414"},{"@type":"NRID","@value":"9000365023803"},{"@type":"NRID","@value":"9000365023798"},{"@type":"NRID","@value":"9000365023726"},{"@type":"NRID","@value":"9000365023741"},{"@type":"NRID","@value":"9000365023751"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0009522"}],"foaf:name":[{"@language":"en","@value":"Shuto Kenji"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Geology and Mineralogy, Faculty of Science, Niigata University"}]},{"@id":"https://cir.nii.ac.jp/crid/1030003658373449216","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"20108179"},{"@type":"NRID","@value":"1000020108179"},{"@type":"NRID","@value":"9000002207131"},{"@type":"NRID","@value":"9000004611498"},{"@type":"NRID","@value":"9000022836787"},{"@type":"NRID","@value":"9000254146389"},{"@type":"NRID","@value":"9000270169646"},{"@type":"NRID","@value":"9000254578750"},{"@type":"NRID","@value":"9000021294946"},{"@type":"NRID","@value":"9000254146457"},{"@type":"NRID","@value":"9000020203376"},{"@type":"NRID","@value":"9000254579133"},{"@type":"NRID","@value":"9000020236508"},{"@type":"NRID","@value":"9000016939595"},{"@type":"NRID","@value":"9000365023478"},{"@type":"NRID","@value":"9000365023799"},{"@type":"NRID","@value":"9000365023795"},{"@type":"NRID","@value":"9000365024391"},{"@type":"NRID","@value":"9000365023742"},{"@type":"NRID","@value":"9000365023812"},{"@type":"NRID","@value":"9000365024375"},{"@type":"NRID","@value":"9000365023821"},{"@type":"NRID","@value":"9000365023891"},{"@type":"NRID","@value":"9000365021065"},{"@type":"NRID","@value":"9000365023758"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0016187"}],"foaf:name":[{"@language":"en","@value":"Kagami Hiroo"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Institute for Study of the Earth's Interior, Okayama University"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00167002"},{"@type":"LISSN","@value":"00167002"},{"@type":"EISSN","@value":"18805973"},{"@type":"PISSN","@value":"http://id.crossref.org/issn/00167002"}],"prism:publicationName":[{"@language":"en","@value":"GEOCHEMICAL JOURNAL"},{"@language":"ja","@value":"ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ"},{"@language":"en","@value":"Geochem. J."},{"@language":"ja","@value":"Ｇｅｏｃｈｅｍ．　Ｊ．"}],"dc:publisher":[{"@language":"en","@value":"GEOCHEMICAL SOCIETY OF JAPAN"},{"@language":"ja","@value":"一般社団法人日本地球化学会"}],"prism:publicationDate":"1994","prism:volume":"28","prism:number":"6","prism:startingPage":"473","prism:endingPage":"487"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","availableAt":"1994","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/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/1360285711231218944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Evolution of late Cenozoic magmatism and the crust–mantle structure in the NE Japan Arc"}]},{"@id":"https://cir.nii.ac.jp/crid/1360302865555972352","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Thermal Evolution of the Lithosphere‐Asthenosphere Boundary Beneath Arc and Its Geodynamic Implications: Depth Variation of Thermal Histories of Mantle Xenoliths From Ichinomegata, Northeast Japan"}]},{"@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/1390001206237660032","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Geochemical character of Early-Middle Miocene volcanic rocks from central Hokkaido: Characterization of magma-related back-arc spreading at the margin of the volcanic field"},{"@language":"ja","@value":"前期～中期中新世の北海道中央部における火山岩の地球化学的特徴：背弧拡大に伴う火成活動縁辺部のマグマの特徴"},{"@language":"ja-Kana","@value":"ゼンキ チュウキ チュウシンセイ ノ ホッカイドウ チュウオウブ ニ オケル カザンガン ノ チキュウ カガクテキ トクチョウ ハイ コ カクダイ ニ トモナウ カセイカツドウ エンペンブ ノ マグマ ノ トクチョウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206524319744","@type":"Article","relationType":["isReferencedBy"],"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/1390001206524447104","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"栃木県宇都宮市北部に分布する茗荷沢層および風見山田層火山岩類の岩石学的研究"},{"@language":"en","@value":"Petrology of Myogazawa and Kazamiyamada volcanic rocks distributed in northern Utsunomiya, central Japan"},{"@value":"栃木県宇都宮市北部に分布する若荷沢層および風見山田層火山岩類の岩石学的研究"},{"@language":"ja-Kana","@value":"トチギケン ウツノミヤシ ホクブ ニ ブンプ スル ワカカ サワソウ オヨビ カザミ ヤマダソウ カザンガンルイ ノ ガンセキガクテキ ケンキュウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206546056320","@type":"Article","relationType":["isReferencedBy"],"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/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/1390282681212188032","@type":"Article","relationType":["isReferencedBy"],"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"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:0003161156"},{"@type":"CROSSREF","@value":"10.2343/geochemj.28.473"},{"@type":"CIA","@value":"130003743314"},{"@type":"OPENAIRE","@value":"doi_dedup___::e0f3f5bcd0ac169d889f746c7bfdd954"},{"@type":"CROSSREF","@value":"10.1093/petrology/egt052_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.1093/petrology/egv073_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.2465/jmps.97.85_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.3720/japt.73.517_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.1111/j.1751-3928.2012.00202.x_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.1144/sp385.15_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.1029/2023jb027208_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.2465/ganko.94.145_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.2465/gkk.160229_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.2465/gkk.30.265_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.1016/j.lithos.2014.06.008_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"},{"@type":"CROSSREF","@value":"10.5575/geosoc.116.199_references_DOI_54b2rzZo4WZEeiwRbtF7jKpYJGi"}]}