{"created":"2023-07-25T11:03:11.308632+00:00","id":6012,"links":{},"metadata":{"_buckets":{"deposit":"3308d20b-2dec-406d-a49c-8f59df1f5de6"},"_deposit":{"created_by":4,"id":"6012","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"6012"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00006012","sets":["1259:1260:1264:773:779"]},"author_link":["9934","23243","16340","65192"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2002-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"96","bibliographicPageStart":"78","bibliographicVolumeNumber":"15","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":"Tomiyama, Takayuki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yamaguchi, Akira ","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Misawa, Keiji","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kojima, Hideyasu","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":"Allan Hills (ALH-) 77252 is a regolith breccia consisting of various types of clasts differing in metamorphic grades (L3-6). Titanium/aluminum ratios of low-Ca pyroxene in ALH-77252 are bimodally distributed. In equilibrated clasts, Ti/Al ratios of low-Ca pyroxene are ∿0.5 which are quite different from those in unequilibrated clasts of ∿0.07. Among equilibrated and unequilibrated clasts, the Ti/Cr ratio of low-Ca pyroxene also shows large differences. Because titanium and aluminum are not diffusive elements in the pyroxene crystal structure, diffusional redistribution of titanium and aluminum in low-Ca pyroxene requires significantly higher metamorphic temperature than Fe-Mg homogenization, possibly above ∿800℃. Alternatively, if the source materials of L-group chondrites were initially different, the fingerprints of mineral properties resistant to thermal metamorphism remain unchanged. If this was the case, the distinctly higher Ti/Al ratios of low-Ca pyroxene in equilibrated clasts originated from the primary signatures of low-Ca pyroxene prior to thermal metamorphism.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00006012","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":"Department of Polar Science, School of Mathematics and Physics, The Graduate University for Advanced Studies/Antarctic Meteorite Research Center, National Institute of Polar Research/Antarctic Meteorite Research Center, National Institute of Polar Research/Antarctic Meteorite Research Center, 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":"2002-03-01"}],"displaytype":"detail","filename":"KJ00000041004.pdf","filesize":[{"value":"2.5 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000041004","url":"https://nipr.repo.nii.ac.jp/record/6012/files/KJ00000041004.pdf"},"version_id":"a815dc82-9de5-431e-af50-8e10fb278b2f"}]},"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":"Minor element chemistry of low-Ca pyroxene in Allan Hills-77252, an L3-6 regolith breccia","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Minor element chemistry of low-Ca pyroxene in Allan Hills-77252, an L3-6 regolith breccia"}]},"item_type_id":"1","owner":"4","path":["779"],"pubdate":{"attribute_name":"公開日","attribute_value":"2002-03-01"},"publish_date":"2002-03-01","publish_status":"0","recid":"6012","relation_version_is_last":true,"title":["Minor element chemistry of low-Ca pyroxene in Allan Hills-77252, an L3-6 regolith breccia"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:07:28.526065+00:00"}