{"created":"2023-07-25T11:03:06.689263+00:00","id":5927,"links":{},"metadata":{"_buckets":{"deposit":"e6d8a147-c0b2-4016-a556-ae5b2ac7d893"},"_deposit":{"created_by":4,"id":"5927","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"5927"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00005927","sets":["1259:1260:1264:773:775"]},"author_link":["43987","43989","43988","43986","9856"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1998-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"121","bibliographicPageStart":"103","bibliographicVolumeNumber":"11","bibliographic_titles":[{"bibliographic_title":"Antarctic meteorite research"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kita,Noriko T.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Togashi,Shigeko","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Morishita,Yuichi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Terashima,Shigeru","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yurimoto,Hisayoshi","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":"We have developed a technique for in-situ Ni isotopic analysis using the ion microprobe, in order to detect ^<60>Ni excess from the decay of the short lived nuclide ^<60>Fe (half life=1.5Ma) in ureilite samples. The silicate minerals from MET-78008 ureilite with an old U-Pb age of 4.563±0.006 Ga were analyzed. The ^<56>Fe/^<58>Ni ratios of olivine and orthopyroxene are between 2700 and 5400. In spite of the high Fe/Ni ratios, we could not observe any detectable ^<60>Ni excess. From the mean value of olivine core data, we obtain an upper limit of the ^<60>Fe/^<56>Fe ratio at the time of ureilite formation of 1.8×10^<-7>. The time difference between CAI formation and ureilite formation was estimated to be more than 4 million years, which is consistent with the UPb data from the same meteorite. We concluded that the impact event for the disruption of the ureilite parent body happened more than 4 million years after CAI formation. However, a large uncertainty in the initial ^<60>Fe/^<56>Fe ratio is introduced by the possibility that the ^<60>Ni excess observed in CAIs is of nucleosynthetic origin. Our conclusion may change if the initial ^<60>Fe/^<56>Fe ratio of the solar system using CAI data is too high.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00005927","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":"AA11182426","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":"Geological Survey of Japan/Geological Survey of Japan/Geological Survey of Japan/Geological Survey of Japan/Dept. Earth and Planetary Science, Faculty of Science, Tokyo Institute of Technology"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1998-03-01"}],"displaytype":"detail","filename":"KJ00000040919.pdf","filesize":[{"value":"2.6 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000040919","url":"https://nipr.repo.nii.ac.jp/record/5927/files/KJ00000040919.pdf"},"version_id":"a35b5c38-b2e2-49f5-925e-ee9af82015b9"}]},"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":"Search for 60Ni excesses in MET-78008 ureilite: An ion microprobe study","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Search for 60Ni excesses in MET-78008 ureilite: An ion microprobe study"}]},"item_type_id":"1","owner":"4","path":["775"],"pubdate":{"attribute_name":"公開日","attribute_value":"1998-03-01"},"publish_date":"1998-03-01","publish_status":"0","recid":"5927","relation_version_is_last":true,"title":["Search for 60Ni excesses in MET-78008 ureilite: An ion microprobe study"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:08:33.683026+00:00"}