{"created":"2023-07-25T11:02:24.664305+00:00","id":4641,"links":{},"metadata":{"_buckets":{"deposit":"10b09299-8451-4378-9965-3fc1799cdac4"},"_deposit":{"created_by":4,"id":"4641","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"4641"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00004641","sets":["1259:1260:1264:584:591"]},"author_link":["1379","47169","578","7996","21583","957","47168","733","9934","1723"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1994-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"143","bibliographicPageStart":"125","bibliographicVolumeNumber":"7","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":"Nakamura, Noboru","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Morikawa, Noritoshi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Hutchison, Robert","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Clayton, Robert N.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Mayeda, Toshiko K.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nagao, Keisuke","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Misawa, Keiji","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Okano, Osamu ","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yanai, Keizo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Matsumoto, Yukio","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":"Igneous inclusions and hosts of the Yamato ordinary chondrites Y-75097 (L6), Y-793241 (L6) and Y-794046 (H5) were analyzed for lithophile trace elements, and Rb-Sr, rare gas and oxygen isotopes, together with preliminary petrographic examinations. On a three oxygen-isotope plot, all the inclusions lie near the H-chondrite field. The Y-75097 host and inclusion were severely shocked and the Rb-Sr systematics were disturbed by a 500Ma event which was defined by the K-Ar age. The Y-793241 host and inclusion are unshocked and have an old K-Ar age of 4270±170Ma and undisturbed Rb-Sr systematics for the bulk meteorite. Both Y-75097 and Y-793241 inclusions have similar chemical compositions and mineral assemblages consisting mainly of olivine (Fa_<25>), and minor plagioclase (An_<12-19>), chlor-apatite, merrillite and chromite. Olivines in both inclusions equilibrated with those of their L6 hosts. The two inclusion mantles consisting of mainly olivine and plagioclase show a highly fractionated REE pattern with middle REE depletion and a large positive Eu anomaly (50-100 times chondritic) (V-shaped). A model calculation suggests that this remarkable REE fractionation was produced by thermal equilibration with the phosphate-rich cores of inclusions during the igneous formation and the metamorphic event. The Y-794046 inclusion comprises abundant anhedral olivines (Fa_<20.5>), fractured pyroxenes (Fs_<14-16.5>) and microcrystalline plagioclase (An_<3-5>Ab_<81-96>Or_<0-16>). The inclusion did not equilibrate with its host which has less Fe-rich olivines (Fa_<19>) and more Fe in pyroxenes (Fs_<17.5>). The inclusion shows an unfractionated REE pattern. We suggest that the three inclusions formed by melting of differentiated precursor materials carrying unfractionated REE. They were then incorporated into the L-or H-chondrite parent bodies and subjected to the early thermal metamorphism, which eventually overprinted the fractionated REE in the Y-75097 and Y-793241 inclusions by solid/solid equilibrium partitioning. The Y-794046 inclusion was subjected to less extensive equilibration, so that REE abundances remained unfractionated.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00004641","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 and Planetary Sciences, Faculty of Science, Kobe University/Department of Earth and Planetary Sciences, Faculty of Science, Kobe University/Department of Mineralogy, The Natural History Museum/Enrico Fermi Institute, University of Chicago/Enrico Fermi Institute, University of Chicago/Institute for Study of the Earth's Interior, Okayama University/Department of Earth and Planetary Sciences, Faculty of Science, Kobe University/Department of Geosciences, Faculty of Science, Okayama University/Department of Earth and Planetary Sciences, Faculty of Science, Kobe University/National Institute of Polar Research"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1994-03-01"}],"displaytype":"detail","filename":"KJ00000036447.pdf","filesize":[{"value":"2.0 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000036447","url":"https://nipr.repo.nii.ac.jp/record/4641/files/KJ00000036447.pdf"},"version_id":"1945d583-1d30-4700-af09-84efbc2077f0"}]},"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":"Trace element and isotopic characteristics of inclusions in the Yamato ordinary chondrites Y-75097, Y-793241 and Y-794046","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Trace element and isotopic characteristics of inclusions in the Yamato ordinary chondrites Y-75097, Y-793241 and Y-794046"}]},"item_type_id":"1","owner":"4","path":["591"],"pubdate":{"attribute_name":"公開日","attribute_value":"1994-03-01"},"publish_date":"1994-03-01","publish_status":"0","recid":"4641","relation_version_is_last":true,"title":["Trace element and isotopic characteristics of inclusions in the Yamato ordinary chondrites Y-75097, Y-793241 and Y-794046"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:18:04.740751+00:00"}