{"created":"2021-03-01T06:06:56.812731+00:00","id":3199,"links":{},"metadata":{"_buckets":{"deposit":"2622f4d2-e62a-4f4a-82c2-762a2eb1669e"},"_deposit":{"id":"3199","owners":[],"pid":{"revision_id":0,"type":"depid","value":"3199"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00003199","sets":["176:488:489","453:454"]},"item_5_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Petrology of the volcanic rocks from the Torikabuto Volcano, North, Fossa Magna, central Japan : Differentiation process of calc-alkaline volcanic rocks"}]},"item_5_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2007-11","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"11","bibliographicPageEnd":"584","bibliographicPageStart":"565","bibliographicVolumeNumber":"113","bibliographic_titles":[{"bibliographic_title":"地質学雑誌"},{"bibliographic_title":"地質学雑誌","bibliographic_titleLang":"en"}]}]},"item_5_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The Torikabuto Volcano is located at a northeastern end of the \"Central Upheaval Zone\" in the North Fosssa-magna region, central Japan. Most of the volcanic rocks of the Torikabuto Volcano belong to the calc-alkaline rock series, and are composed of basaltic andesite, dacite lavas, and volcaniclastics. Based on their stratigraphic data, volcanic activities in the Torikabuto Volcano are divided into four stages；Maekura Stage, Stage 1, Stage 2, and Stage 3. The rocks at the Maeura Stage are pyroxene-andesite pyroclastic and lava flows. The rocks at the stage 1 are characterized by large amounts of pyroclastic flows, which are composed of the rocks ranging from basaltic andesite to dacite. The lava flows ranging from basaltic andesite to dacite are widely developed at Stage 2. A small quantity of dacitic pyroclastic flows was formed at the Stage 3. The volcanic rocks at the Stages 1 and 2 contain gabbroic inclusions and in some places they exhibit the layered structure. The K-Ar age dating data indicate that the age of the rocks at the Maekura Stage is ～ 3.2Ma and the age of those at the Stage 2 is between 0.9-0.8Ma (Kaneko et al., 1989). Base on the examination of the petrographica1, mineralogaical, whole-rock geochemical, and Sr-Nd isotopic characteristic of the volcanic rocks from the Torikabuto Volcano, we draws following conclusions. 1) Magma mixing is recognized from field observation, petrology of the volcanic rocks and mineralogy of plagioclase after the Stage 1. 2) However, fractional crystallization processes of the calc-alkaline magma mainly formed the calc-alkaline volcanic rocks from the Torikabuto Volcano. The fractionated minerals are plagioclase, clinopyroxene, orthopyroxene, Fe-Ti oxides and hornblende. This is supported by the results from mass-balance calculation. 3) The Sr-Nd isotopic ratios of volcanic rocks and inclusions from the Torikabuto Volcano, have the same values. This indicates that the volcanic rocks and inclusions formed from the same magma. 4) Accordingly， the magma mixing process that is recognized from the volcanic rocks of the Torikabuto Volcano is the \"internal mixing\" and the inclusions are cumulated rocks.","subitem_description_type":"Abstract"},{"subitem_description":"鳥甲火山は，北部フォッサマグナ中央隆起帯北縁に位置し，カルクアルカリ系列安山岩～デイサイトよりなる．これらは，前倉ステージ噴出物と鳥甲火山噴出物ステージ1～3に区分され（五十嵐，1992），前倉ステージ噴出物が3.2Ma，鳥甲火山ステージ2噴出物が0.8Maの年代値を示す（金子ほか，1989）．これら噴出物は，主に前倉ステージ噴出物が輝石安山岩溶岩・火砕岩，鳥甲火山ステージ1噴出物が輝石安山岩～黒雲母・角閃石デイサイト火砕流堆積物，ステージ2噴出物がカンラン石・輝石安山岩～角閃石・輝石デイサイト溶岩よりなり，ステージ1以降のものには，ハンレイ岩質捕獲岩，花崗岩質捕獲岩が包有される． 今回，それら火山噴出物の全岩化学組成，鉱物化学組成，Sr, Nd同位体化学組成を基に岩石学的な検討を行った．その結果，カルクアルカリ質安山岩～デイサイトよりなる鳥甲火山岩類は，内部混合作用は認められるが，主には3kbar以浅のマグマ溜まり内での分別結晶作用により形成されたとの結論を得た．","subitem_description_type":"Abstract"}]},"item_5_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"41385","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Igarashi, Satoshi"}]},{"nameIdentifiers":[{"nameIdentifier":"41386","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Arima, Makoto"}]},{"nameIdentifiers":[{"nameIdentifier":"41387","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kimura, Jun0ichi"}]},{"nameIdentifiers":[{"nameIdentifier":"41388","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Shuto, Kenji"}]}]},"item_5_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本地質学会"}]},"item_5_select_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_5_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00141768","subitem_source_identifier_type":"NCID"}]},"item_5_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00167630","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"五十嵐, 聡"}],"nameIdentifiers":[{"nameIdentifier":"41381","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"有馬, 眞"}],"nameIdentifiers":[{"nameIdentifier":"41382","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"木村, 純一"}],"nameIdentifiers":[{"nameIdentifier":"41383","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"周藤, 賢治"}],"nameIdentifiers":[{"nameIdentifier":"41384","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":"2019-07-30"}],"displaytype":"detail","filename":"ZC_113(11)_565-584.pdf","filesize":[{"value":"2.4 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ZC_113(11)_565-584.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/3199/files/ZC_113(11)_565-584.pdf"},"version_id":"ac8e1284-7c6c-464a-9a69-ed51a0a84119"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"North Fossa Magna","subitem_subject_scheme":"Other"},{"subitem_subject":"Early Pleistocene","subitem_subject_scheme":"Other"},{"subitem_subject":"Torikabuto Volcano","subitem_subject_scheme":"Other"},{"subitem_subject":"fractional crystallization","subitem_subject_scheme":"Other"},{"subitem_subject":"internal mixing","subitem_subject_scheme":"Other"},{"subitem_subject":"Sr-Nd isotopic compositions","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"北部フォッサマグナ、鳥甲火山噴出物の岩石学 : カルクアルカリ系列火山岩類の形成過程","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"北部フォッサマグナ、鳥甲火山噴出物の岩石学 : カルクアルカリ系列火山岩類の形成過程"},{"subitem_title":"北部フォッサマグナ、鳥甲火山噴出物の岩石学 : カルクアルカリ系列火山岩類の形成過程","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["454","489"],"pubdate":{"attribute_name":"公開日","attribute_value":"2012-04-11"},"publish_date":"2012-04-11","publish_status":"0","recid":"3199","relation_version_is_last":true,"title":["北部フォッサマグナ、鳥甲火山噴出物の岩石学 : カルクアルカリ系列火山岩類の形成過程"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:36:21.647863+00:00"}