{"created":"2021-03-01T06:51:27.891024+00:00","id":32758,"links":{},"metadata":{"_buckets":{"deposit":"a48cf0c9-565f-4032-b911-5968ae3e00f3"},"_deposit":{"id":"32758","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"32758"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00032758","sets":["80:4535:4717:4725","9:504:4538:4719:4726"]},"author_link":["127350","127351","127352","127353","127354","127355","127356","127343","127344","127345","127346","127347","127348","127349"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"DELP 1988年度沖繩トラフ海域研究航海報告 : 6. 火山岩の岩石学"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1991-06-28","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"177","bibliographicPageStart":"151","bibliographicVolumeNumber":"66","bibliographic_titles":[{"bibliographic_title":"東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]},"item_4_description_13":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"During the DELP-88 Cruise, a large amount of volcanic rocks was collected from five dredge sites in the Southern Okinawa Trough and the Middle Okinawa Trough. Samples from the central graben structure (DR3, DR8) show the chemical compositions of calc-alkaline rock or tholeiitic rock of Island Arc type, as reported previously. The results are concordant with geophysical data suggesting that oceanic crust is absent in this area. Volcanic rocks of DR5B are low-alkali tholeiitic rocks of Island Arc type and they are marked off from the volcanic rocks of the Middle and Southern Okinawa Trough by the oxide-SiO2 variation diagram. The volcanic rocks of DR5B may represent the southwestern extention of Quaternary-volcanic front of the Ryukyu Arc. The K-Ar ages of samples from the Iheya Deep in the Middle Okinawa Trough indicate that these rocks are mostly younger than 1Ma (DR7; 0.112±0.019Ma and DR8; 0.496±0.380Ma). Since the K-Ar ages of dredged samples from the Yaeyama Graben in the Southern Okinawa Trough are also younger than 1Ma, the formation of the Iheya Deep and the Yaeyama Graben took place concurrently. The K-Ar age of basalt from DR5B which is located near the supposed Quaternary-volcanic front, is also 0.505±0.453Ma. The temperatures of crystallization of phenocrysts of samples from DELP-88 were found to be 1100° for basalt (DR5B-H), 783 to 800° for dacite (DR7-H), and 900 to 950° for andesite (DR8-H) under 1 atmospheric pressure. These volcanic rocks in the Okinawa Trough region were crystallized under redox conditions near fayalite-magnetite-quartz assemblage.","subitem_description_type":"Abstract"},{"subitem_description":"DELP-88航海では,中部および南部沖縄トラフで8地点のドレッジがおこなわれ,その内の5地点(DR3, DR5B, DR7, DR8,およびDR10)で多くの火山岩類が採取された.これらのトラフ中に形成されているグラーペンの中軸部の岩石(DR3, DR8)はカルクアルカリ岩または島弧ソレアイトの特徴を示し,これまで報告されている化学分析結果と調和的である.この結果は,この海域で海洋地殻が見出されていないという地球物理学のデータとも矛盾しない.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"127350","nameIdentifierScheme":"WEKO"}],"names":[{"name":"石川, 政憲"}]},{"nameIdentifiers":[{"nameIdentifier":"127351","nameIdentifierScheme":"WEKO"}],"names":[{"name":"佐藤, 博明"}]},{"nameIdentifiers":[{"nameIdentifier":"127352","nameIdentifierScheme":"WEKO"}],"names":[{"name":"古川, 雅英"}]},{"nameIdentifiers":[{"nameIdentifier":"127353","nameIdentifierScheme":"WEKO"}],"names":[{"name":"木村, 政昭"}]},{"nameIdentifiers":[{"nameIdentifier":"127354","nameIdentifierScheme":"WEKO"}],"names":[{"name":"加藤, 祐三"}]},{"nameIdentifiers":[{"nameIdentifier":"127355","nameIdentifierScheme":"WEKO"}],"names":[{"name":"津輕, 良介"}]},{"nameIdentifiers":[{"nameIdentifier":"127356","nameIdentifierScheme":"WEKO"}],"names":[{"name":"嶋村, 清"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000032758","subitem_identifier_reg_type":"JaLC"}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学地震研究所"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162258","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00408972","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"453","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"Earthquake Research Institute, University of Tokyo"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"Department of Marine Mineral Resources, Tokai University"},{"subitem_text_value":"Fac. Integ. Arts and Sci., Hiroshima University"},{"subitem_text_value":"Department of Earth Science, Kobe University"},{"subitem_text_value":"Department of Marine Sciences, University of the Ryukyus"},{"subitem_text_value":"School of Agriculture, Kyushu Tokai Univ"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Ishikawa, Masanori"}],"nameIdentifiers":[{"nameIdentifier":"127343","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Sato, Hiroaki"}],"nameIdentifiers":[{"nameIdentifier":"127344","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Furukawa, Masahide"}],"nameIdentifiers":[{"nameIdentifier":"127345","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kimura, Masaki"}],"nameIdentifiers":[{"nameIdentifier":"127346","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kato, Yuzo"}],"nameIdentifiers":[{"nameIdentifier":"127347","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tsugaru, Ryosuke"}],"nameIdentifiers":[{"nameIdentifier":"127348","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shimamura, Kiyoshi"}],"nameIdentifiers":[{"nameIdentifier":"127349","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":"2017-06-26"}],"displaytype":"detail","filename":"ji0661006.pdf","filesize":[{"value":"5.6 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0661006.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/32758/files/ji0661006.pdf"},"version_id":"1b5ad418-0903-4922-8144-0542c0e7079b"}]},"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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Report on DELP 1988 Cruises in the Okinawa Trough : Part 6. Petrology of Volcanic Rocks","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Report on DELP 1988 Cruises in the Okinawa Trough : Part 6. Petrology of Volcanic Rocks","subitem_title_language":"en"}]},"item_type_id":"4","owner":"1","path":["4725","4726"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2009-10-13"},"publish_date":"2009-10-13","publish_status":"0","recid":"32758","relation_version_is_last":true,"title":["Report on DELP 1988 Cruises in the Okinawa Trough : Part 6. Petrology of Volcanic Rocks"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T04:08:43.540453+00:00"}