{"created":"2023-05-15T15:32:21.110204+00:00","id":2418,"links":{},"metadata":{"_buckets":{"deposit":"59144dba-46d8-44d2-9385-f23b154dd7f2"},"_deposit":{"created_by":3,"id":"2418","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"2418"},"status":"published"},"_oai":{"id":"oai:kochi.repo.nii.ac.jp:00002418","sets":["100:109:161"]},"author_link":["12009","12010","12011","12012","12013"],"control_number":"2418","item_17_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1989-12-20","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"117","bibliographicPageStart":"105","bibliographicVolumeNumber":"4","bibliographic_titles":[{"bibliographic_title":"くろしお. 特別号 : 高知大学黒潮圏研究所所報 = Report of the Institute of the Kuroshio Sphere, Kochi University. Special series"}]}]},"item_17_description_14":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_17_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Nd and Sr isotopic compositions were determined for the Tertiary volcanics from the back-arc side of the NE Japan arc. Sr isotopes show a linear trend through time from an enriched signature (^<87>Sr/ ^<86>Sr = 0.705437) to a depleted signature (^<87>Sr/ ^<86>Sr = 0.70270). In a complementary fashion, Nd isotopes start at low value ( ∈_<Nd> = -0.80)and show a gradual increase ( ∈_<Nd> = 8.3) with decreasing age. Isotopic change of Nd and Sr from the enriched signature to the depleted one is synchronous with the opening of the Japan sea at ～15 Ma. This synchronism indicates that the opening of the Japan Sea was initiated by the injection of the asthenosphere. During the pre-opening stage, the mantle wedge was composed of a two-layered structure: the sub-continental lithosphere and the underlying asthenosphere. The volcanics of this stage characterized by an enriched isotopic signature were derived from a source with a higher proportion of sub-continental lithosphere. The sub-continintal lithosphere of the back-arc side was thinned by the injection of the depleted asthenosphere, which accelerated the growth of the MORB source within the mantle wedge of the back-arc side and resulted in magma generation with the depleted isotopic signature of Nd and Sr at the post-opening stage.","subitem_description_type":"Abstract"}]},"item_17_description_5":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"Japanese WESTPAC Symposium. June 6-7, 1989. Ocean Research Institute, University of Tokyo. 西太平洋におけるマイクロプレートテクトニクスと古環境地図に関する研究会. 1989年6月6日-7日. 東京大学海洋研究所.","subitem_description_type":"Other"}]},"item_17_publisher_31":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"高知大学黒潮圏研究所","subitem_publisher_language":"ja"}]},"item_17_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"09131302","subitem_source_identifier_type":"ISSN"}]},"item_17_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN1020384X","subitem_source_identifier_type":"NCID"}]},"item_17_version_type_15":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Nohda, Susumu"}],"nameIdentifiers":[{"nameIdentifier":"12009","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tatsumi, Yoshiyuki"}],"nameIdentifiers":[{"nameIdentifier":"12010","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Otofuji, Yo-ichiro"}],"nameIdentifiers":[{"nameIdentifier":"12011","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Matsuda, Takaaki"}],"nameIdentifiers":[{"nameIdentifier":"12012","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ishizaka, Kyoichi"}],"nameIdentifiers":[{"nameIdentifier":"12013","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-04-23"}],"displaytype":"detail","filename":"105nohda.pdf","filesize":[{"value":"1.2 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"105nohda.pdf","url":"https://kochi.repo.nii.ac.jp/record/2418/files/105nohda.pdf"},"version_id":"91714cc4-c87c-4356-9cd8-75a0f52a8bcf"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Asthenospheric injection","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Back-arc opening","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Isotopic composition","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Northeast Japan","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"Asthenospheric injection and back-arc opening: Isotopic evidence from Northeast Japan","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Asthenospheric injection and back-arc opening: Isotopic evidence from Northeast Japan","subitem_title_language":"en"}]},"item_type_id":"17","owner":"3","path":["161"],"pubdate":{"attribute_name":"公開日","attribute_value":"2010-05-12"},"publish_date":"2010-05-12","publish_status":"0","recid":"2418","relation_version_is_last":true,"title":["Asthenospheric injection and back-arc opening: Isotopic evidence from Northeast Japan"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-09-01T00:56:43.209499+00:00"}