{"@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/1390282681218847488.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.5575/geosoc.2012.0044"}},{"identifier":{"@type":"COI","@value":"1:CAS:528:DC%2BC3sXos1ymsL8%3D"}},{"identifier":{"@type":"URI","@value":"https://petit.lib.yamaguchi-u.ac.jp/23257"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"024638650"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/024638650"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I024638650"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/geosoc/119/4/119_2012.0044/_pdf"}},{"identifier":{"@type":"NAID","@value":"130003363932"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@language":"en","@value":"K-Ar ages and paleomagnetism of the Miocene in the Izumo Basin, Shimane Prefecture"},{"@language":"ja","@value":"島根県出雲市南方地域における中新統のK–Ar年代と古地磁気方位"},{"@language":"ja-Kana","@value":"シマネケン イズモシ ナンポウ チイキ ニオケル チュウシントウ ノ K-Ar ネンダイ ト コチ ジキ ホウイ"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"This paper reports new K-Ar ages of 23 volcanic and two plutonic rocks (23 whole rock ages, and three plagioclase, four hornblende, and two biotite mineral ages) from the southern part of the Izumo Basin. Based on these new ages and on previous geological, geochronological, and biostratigraphic data, we find that: (1) Strata dated at 20-19 Ma (21-18 Ma, including error) in the Izumo Basin and previously described as “Kawai Formation” are newly defined as the lower Miocene “Sada Formation”. Equivalent strata are sporadically distributed in areas along the Japan Sea coast of eastern Shimane Prefecture. (2) K-Ar ages of the Hata and Kawai-Kuri Formations range from 17 to 15 Ma. The Hata Formation has previously been defined as lower Miocene standard strata in the eastern part of Shimane Prefecture, but it is latest early to middle Miocene in age, and the time gap between the Hata and Kawai Formations is very small. Paleomagnetic directions were measured at 17 sites in Miocene strata in the southern parts of Izumo and Matsue Basins. The paleomagnetic features show that: (1) The declination of the “Sada Formation” is about 50°E. (2) The paleomagnetic directions of most Hata volcanic rocks and the Yoshida plutonic complex are similar to the present magnetic direction, or are reversed. (3) The declinations of some Hata and Daito Formation strata dated at 16.6-16.0 Ma are 26-19°E. Based on geology, ages and paleomagnetism, we conclude that clockwise rotation of the Chugoku district took place after 18 Ma, and ceased before 16 Ma. The Hata Formation was thus produced during the opening of the Japan Sea."},{"@language":"ja","@value":"島根県東部における中新統の火山岩類23試料と深成岩類2試料について全岩23試料および斜長石3試料，角閃石4試料，黒雲母2試料のK–Ar年代を報告した．これまでに報告されている放射年代や生層序も含めて検討し，次のような結論を得た．（1）出雲湾入部で，これまで川合層とされていた火山岩類のうち20–19 Ma（誤差を含めると22–18 Ma）の年代を示す火山岩類を「佐田層」として区別した．（2）波多層は下部中新統ではなく最上部下部中新統～中部中新統で，川合層との間には時間的ギャップはない．波多層・川合層のK–Ar年代は17–15 Maである．古地磁気方位を測定した結果，（1）「佐田層」は約50°東偏している．（2）ほとんどの波多層の火山岩および同時期の深成岩はほぼ真北か真南の偏角をもつ．（3）16.5 Ma前後の年代を示す波多層と大東層の火山岩類は19–26°東偏している．4）これらのことから中国地方の時計回り回転運動は18 Ma以降に起こり，遅くとも16 Maには終了していたと推定される．"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1030003658319480579","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"80196328"},{"@type":"NRID","@value":"1000080196328"},{"@type":"NRID","@value":"9000014348778"},{"@type":"NRID","@value":"9000391832860"},{"@type":"NRID","@value":"9000255815721"},{"@type":"NRID","@value":"9000008124671"},{"@type":"NRID","@value":"9000321626268"},{"@type":"NRID","@value":"9000003629871"},{"@type":"NRID","@value":"9000021121077"},{"@type":"NRID","@value":"9000258410652"},{"@type":"NRID","@value":"9000363387201"},{"@type":"NRID","@value":"9000345428034"},{"@type":"NRID","@value":"9000258410086"},{"@type":"NRID","@value":"9000004618586"},{"@type":"NRID","@value":"9000391967219"},{"@type":"NRID","@value":"9000347222656"},{"@type":"NRID","@value":"9000254529981"},{"@type":"NRID","@value":"9000240048629"},{"@type":"NRID","@value":"9000392045090"},{"@type":"NRID","@value":"9000258410405"},{"@type":"NRID","@value":"9000258405411"},{"@type":"NRID","@value":"9000365019982"},{"@type":"NRID","@value":"9000254585924"},{"@type":"NRID","@value":"9000391970073"},{"@type":"NRID","@value":"9000345427106"},{"@type":"NRID","@value":"9000006216398"},{"@type":"NRID","@value":"9000014543222"},{"@type":"NRID","@value":"9000004622084"},{"@type":"NRID","@value":"9000020097647"},{"@type":"NRID","@value":"9000391970115"},{"@type":"NRID","@value":"9000345426554"},{"@type":"NRID","@value":"9000347082846"},{"@type":"NRID","@value":"9000258414083"},{"@type":"NRID","@value":"9000009196458"},{"@type":"NRID","@value":"9000258602795"},{"@type":"NRID","@value":"9000365020142"},{"@type":"NRID","@value":"9000254150688"},{"@type":"NRID","@value":"9000391967262"},{"@type":"NRID","@value":"9000002674605"},{"@type":"NRID","@value":"9000004593666"},{"@type":"NRID","@value":"9000391789027"},{"@type":"NRID","@value":"9000395364728"},{"@type":"NRID","@value":"9000010518196"},{"@type":"NRID","@value":"9000021428358"},{"@type":"NRID","@value":"9000345428023"},{"@type":"NRID","@value":"9000365023034"},{"@type":"NRID","@value":"9000254150721"},{"@type":"NRID","@value":"9000005881855"},{"@type":"NRID","@value":"9000283726949"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0015815"}],"foaf:name":[{"@language":"en","@value":"Sawada Yoshihiro"},{"@language":"ja","@value":"沢田 順弘"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Shimane University"},{"@language":"ja","@value":"島根大学"}]},{"@id":"https://cir.nii.ac.jp/crid/1410853022611787139","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000240048630"}],"foaf:name":[{"@language":"en","@value":"Mishiro Yoshihiro"},{"@language":"ja","@value":"三代 喜弘"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Nippon Telegraph and Telephone West Corporation"},{"@language":"ja","@value":"西日本電信電話株式会社広島支店"}]},{"@id":"https://cir.nii.ac.jp/crid/1030003658534700036","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"30193668"},{"@type":"NRID","@value":"1000030193668"},{"@type":"NRID","@value":"9000014139775"},{"@type":"NRID","@value":"9000391785515"},{"@type":"NRID","@value":"9000254111193"},{"@type":"NRID","@value":"9000411623714"},{"@type":"NRID","@value":"9000002551390"},{"@type":"NRID","@value":"9000238064202"},{"@type":"NRID","@value":"9000004617450"},{"@type":"NRID","@value":"9000016873961"},{"@type":"NRID","@value":"9000411623764"},{"@type":"NRID","@value":"9000323305286"},{"@type":"NRID","@value":"9000402492010"},{"@type":"NRID","@value":"9000004621134"},{"@type":"NRID","@value":"9000000745560"},{"@type":"NRID","@value":"9000365021250"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0017101"}],"foaf:name":[{"@language":"en","@value":"Imaoka Teruyoshi"},{"@language":"ja","@value":"今岡 照喜"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"山口大学大学院理工学研究科"},{"@language":"en","@value":"Graduate School of Science and Engineering, Yamaguchi University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410853022611787141","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000240048632"}],"foaf:name":[{"@language":"en","@value":"Yoshida Kiyonori"},{"@language":"ja","@value":"吉田 聖典"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"郵便事業株式会社上野支店"},{"@language":"en","@value":"Japan Post Service Co., Ltd. Ueno Branch"}]},{"@id":"https://cir.nii.ac.jp/crid/1410853022611787140","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000240048633"}],"foaf:name":[{"@language":"en","@value":"Inada Risa"},{"@language":"ja","@value":"稲田 理沙"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"株式会社リニカル"},{"@language":"en","@value":"Linical Co, Ltd."}]},{"@id":"https://cir.nii.ac.jp/crid/1410853022611787137","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000240048634"}],"foaf:name":[{"@language":"en","@value":"Hisai Kazunori"},{"@language":"ja","@value":"久井 和徳"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"雲南農業協同組合"},{"@language":"en","@value":"Unnan Agricultural Cooperative"}]},{"@id":"https://cir.nii.ac.jp/crid/1410853022611787138","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000240048635"}],"foaf:name":[{"@language":"en","@value":"Kondo Hitoshi"},{"@language":"ja","@value":"近藤 仁"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Research Institute of Natural Science, Okayama University of Science"},{"@language":"ja","@value":"岡山理科大学自然科学研究所"}]},{"@id":"https://cir.nii.ac.jp/crid/1410853022611787143","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000240048636"}],"foaf:name":[{"@language":"en","@value":"Hyodo Masayuki"},{"@language":"ja","@value":"兵頭 政幸"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"神戸大学内海域環境教育研究センター"},{"@language":"en","@value":"Research Center for Inland Seas, Kobe University"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00167630"},{"@type":"EISSN","@value":"13499963"},{"@type":"CODEN","@value":"CHTZA5"},{"@type":"NDL_BIB_ID","@value":"000000014674"},{"@type":"ISSN","@value":"00167630"},{"@type":"LISSN","@value":"00167630"},{"@type":"NCID","@value":"AN00141768"}],"prism:publicationName":[{"@language":"en","@value":"The Journal of the Geological Society of Japan"},{"@language":"ja","@value":"地質学雑誌"},{"@language":"en","@value":"Jour. Geol. Soc. Japan"},{"@language":"ja","@value":"地質雑"},{"@language":"ja","@value":"地雑"}],"dc:publisher":[{"@language":"en","@value":"The Geological Society of Japan"},{"@language":"ja","@value":"一般社団法人 日本地質学会"}],"prism:publicationDate":"2013-04-15","prism:volume":"119","prism:number":"4","prism:startingPage":"267","prism:endingPage":"284"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","url":[{"@id":"https://petit.lib.yamaguchi-u.ac.jp/23257"},{"@id":"http://id.ndl.go.jp/bib/024638650"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I024638650"},{"@id":"https://www.jstage.jst.go.jp/article/geosoc/119/4/119_2012.0044/_pdf"},{"@id":"http://petit.lib.yamaguchi-u.ac.jp/23257"}],"availableAt":"2013-04-15","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Miocene","dc:title":"Miocene"},{"@id":"https://cir.nii.ac.jp/all?q=K-Ar%20age","dc:title":"K-Ar age"},{"@id":"https://cir.nii.ac.jp/all?q=paleomagnetism","dc:title":"paleomagnetism"},{"@id":"https://cir.nii.ac.jp/all?q=Chugoku%20district","dc:title":"Chugoku district"},{"@id":"https://cir.nii.ac.jp/all?q=Hata%20Formation","dc:title":"Hata Formation"},{"@id":"https://cir.nii.ac.jp/all?q=Sada%20Formation","dc:title":"Sada Formation"},{"@id":"https://cir.nii.ac.jp/all?q=Kawai%20Formation","dc:title":"Kawai Formation"},{"@id":"https://cir.nii.ac.jp/all?q=rotation%20of%20SW%20Japan","dc:title":"rotation of SW Japan"},{"@id":"https://cir.nii.ac.jp/all?q=Japan%20Sea%20opening","dc:title":"Japan Sea opening"}],"dcterms:subject":[{"subjectScheme":"Other","notation":[{"@value":"Miocene"}]},{"subjectScheme":"Other","notation":[{"@value":"K-Ar age"}]},{"subjectScheme":"Other","notation":[{"@value":"paleomagnetism"}]},{"subjectScheme":"Other","notation":[{"@value":"Chugoku district"}]},{"subjectScheme":"Other","notation":[{"@value":"Hata Formation"}]},{"subjectScheme":"Other","notation":[{"@value":"Sada Formation"}]},{"subjectScheme":"Other","notation":[{"@value":"Kawai Formation"}]},{"subjectScheme":"Other","notation":[{"@value":"rotation of SW Japan"}]},{"subjectScheme":"Other","notation":[{"@value":"Japan Sea opening"}]}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040000782208313856","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"24540490"},{"@type":"JGN","@value":"JP24540490"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24540490/"}],"notation":[{"@language":"ja","@value":"西南日本の白亜紀弧火成活動とプレートの沈み込み・付加との関連"},{"@language":"en","@value":"Relation between Cretaceous arc magmatism and subduction and accretion"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000782249005056","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"25350498"},{"@type":"JGN","@value":"JP25350498"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-25350498/"}],"notation":[{"@language":"ja","@value":"断層プロセスゾーンを考慮した活断層地震と海溝型巨大地震の連動性予測手法の確立"},{"@language":"en","@value":"Establishment of a predictable method for interlocking of active-fault and trench-type great earthquake by considering a fault process zone"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004232419959808","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Palaeoecological effects of back-arc spreading on Miocene benthic communities, SW Japan Arc"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004233003303040","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Upper Miocene Ostracoda in a gravity flow deposit in Central Japan: significance of paleogeography and paleoceanography"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004233021883520","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"First discovery of Eocene coastal-estuarine ostracods from Japan, with the geological history of the migration of estuarine genera in the Far East"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011145740653440","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Subterranean structure of collapse caldera associated with andesitic and dacitic eruptions — Structural evolution of the Miocene Kakeya Cauldron, Southwest Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292617911078144","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Standardization of fission track dating calibration: Recommendation by the Fission Track Working Group of the I.U.G.S. 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2004"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544420323560064","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Rapid rotation of southwest Japan-palaeomagnetism and K-Ar ages of Miocene volcanic rocks of southwest Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544420893629056","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Differential rotation of the eastern part of southwest Japan inferred from paleomagnetism of Cretaceous and Neogene rocks"}]},{"@id":"https://cir.nii.ac.jp/crid/1363107370852369152","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Refined Early to Middle Miocene diatom biochronology for the middle‐ to high‐latitude North Pacific"}]},{"@id":"https://cir.nii.ac.jp/crid/1363388844495616768","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A shallow-marine alkali-basalt tuff cone in the Middle Miocene Jinzai Formation, Izumo, SW Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951795234392320","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"When was the Japan Sea Opened?: Paleomagnetic Evidence from Southwest Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951795991225856","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Paleoposition of Southwest Japan at 16 Ma: Implication from paleomagnetism of the Miocene Ichishi Group"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206233645056","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Geology, radiolarians, and geologic age of the Hokusetsu Subgroup in the Shitara area, Aichi Prefecture, central Japan."},{"@value":"愛知県設楽地域に分布する北設亜層群の地質，放散虫化石，および地質年代"},{"@language":"ja-Kana","@value":"アイチケン シタラ チイキ ニ ブンプ スル ホクセツ アソウグン ノ チシツ ホウサンチュウ カセキ オヨビ チシツ 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