{"created":"2023-07-25T11:02:19.312332+00:00","id":4541,"links":{},"metadata":{"_buckets":{"deposit":"876ea8f9-60c0-4e99-8572-27ce3dc06fc9"},"_deposit":{"created_by":4,"id":"4541","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"4541"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00004541","sets":["1259:1260:1264:584:588"]},"author_link":["1376","66394","1068"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1991-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"143","bibliographicPageStart":"131","bibliographicVolumeNumber":"4","bibliographic_titles":[{"bibliographic_title":"Proceedings of the NIPR Symposium on Antarctic Meteorites"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Ikeda, Yukio","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Tsuchiyama, Akira","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ebihara, Mitsuru","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_1_description_1":{"attribute_name":"ページ属性","attribute_value_mlt":[{"subitem_description":"P(論文)","subitem_description_type":"Other"}]},"item_1_description_12":{"attribute_name":"抄録(英)","attribute_value_mlt":[{"subitem_description":"Two Antarctic achondrites, Yamato (Y)-74359 and Y-74360,are very similar in bulk chemical compositions to the silicate portions of H chondrites, but the siderophile elements are extremely depleted in comparison to those of H chondrites. They consist of olivine, pyroxene and cryptocrystalline feldspar with minor amounts of chromite, kamacite, and troilite, and the chemical compositions of the constituent minerals are similar to those in H chondrites. Taking into consideration that the two achondrites have oxygen isotopic compositions typical of H chondrites, they were produced from H chondrites or the precursors of H chondrites. Chondrules are not observed, and the texture of the two achondrites is similar to one another, although Y-74360 is coarser-grained than Y-74359. Olivine occurs as euhedral or subhedral grains, mostly smaller than 100 microns in diameter, and they show slight chemical zoning, from magnesian cores (Fo_<82-83>) to ferroan rims (Fo_<80-78>). Orthopyroxene occurs as euhedral grains, larger than olivine grains, and also shows slight chemical zoning, from Ca-poorer magnesian cores to Ca-richer ferroan rims. Clinopyroxene occurs as rims of orthopyroxenes and shows remarkable chemical zoning continuously from pigeonitic interiors to augitic rims. Cryptocrystalline feldspar occurs in interstitial spaces between olivine and/or pyroxene, and seems to have crystallized in interstitial liquids in a rapid cooling condition. The cryptocrystalline feldspars in Y-74359 are chemically heterogeneous, classified into three groups, albite (An_<1-4>Ab_<94-96>Or_<2-4>), anorthoclase (An_<6-10>Ab_<79-86>Or_<4-15>), and intermediate alkali feldspar (An_<1-2>Ab_<51-56>Or_<42-47>), and occur in different portions of the thin section. The two achondrites seem to have formed by partial melting from heterogeneous silicate precursors of unequilibrated H chondrites.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00004541","subitem_identifier_reg_type":"JaLC"}]},"item_1_publisher_22":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"National Institute of Polar Research"}]},"item_1_source_id_13":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AA10784627","subitem_source_identifier_type":"NCID"}]},"item_1_text_10":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Department of Earth Sciences, Faculty of Science, Ibaraki University"},{"subitem_text_language":"en","subitem_text_value":"Department of Culture, Osaka University"},{"subitem_text_language":"en","subitem_text_value":"Department of Chemistry, Tokyo Metropolitan University"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1991-03-01"}],"displaytype":"detail","filename":"KJ00000036347.pdf","filesize":[{"value":"1.3 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000036347","url":"https://nipr.repo.nii.ac.jp/record/4541/files/KJ00000036347.pdf"},"version_id":"567ffc89-b845-42b9-988d-ac0d27a90130"}]},"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":"Petrological and geochemical study of the Yamato-74359 and Yamato-74360 achondrites","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Petrological and geochemical study of the Yamato-74359 and Yamato-74360 achondrites"}]},"item_type_id":"1","owner":"4","path":["588"],"pubdate":{"attribute_name":"公開日","attribute_value":"1991-03-01"},"publish_date":"1991-03-01","publish_status":"0","recid":"4541","relation_version_is_last":true,"title":["Petrological and geochemical study of the Yamato-74359 and Yamato-74360 achondrites"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:19:23.921371+00:00"}