{"created":"2023-07-25T11:00:20.578205+00:00","id":2138,"links":{},"metadata":{"_buckets":{"deposit":"84acc299-774f-45ff-8be2-7a47327edf3b"},"_deposit":{"created_by":4,"id":"2138","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"2138"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00002138","sets":["1:356:400"]},"author_link":["41","447"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1987-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"262","bibliographicPageStart":"245","bibliographicVolumeNumber":"46","bibliographic_titles":[{"bibliographic_title":"Memoirs of National Institute of Polar Research. Special issue"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Nagata, Takesi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Funaki, Minoru","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":"Four Ni-rich iron meteorites containing tetrataenite (γ'-phase of Fe-Ni metal) and 2 LL chondrites containing the γ'-phase are provisionally selected as the standard γ'-rich meteorites. They are Santa Catharina and Twin City Ni-rich ataxites, taenite lamellae from Toluca and Itutinga octahedrites and St. Severin and Appley Bridge LL chondrites. The contents of γ'-phase in these standard γ'-rich meteorites were determined by the Mossbauer spectral analysis and their magnetic hysteresis and thermomagnetic characteristics were examined. The magnetic criteria for γ'-rich meteorites derived from the present study are summarized as follows : (1) Remanence coercive force (H_<RC>) is anomalously large (i. e. H_<RC>&ge;500 Oe). (2) The apparent Curie point is 560-580℃. (3) The initial heating thermomagnetic (TM) curve of the γ'-phase is flat below about 500℃ and then sharply drops down to the apparent Curie point. (4) After heating to temperatures above 700℃, the γ'-phase is broken down to the ordinary disordered γ-phase, so that the first-cooling curve and subsequent TM curves have the characteristics of those of γ-phase. (5) Because of the break-down of γ'-phase during the heating procedure, H_C and H_<RC> are much reduced, by up to one order of magnitude or more from their pre-heating initial values. In the present experimental study, 5 Antarctic L chondrites and 4 Antarctic LL chondrites are magnetically examined. The Antarctic chondrites which satisfy the five criteria for γ'-rich meteorites are Yamato-74354 (L6), -74362 (L6), -74442 (L6), ALH-76009 (L6) and Y-790964 (LL).","subitem_description_type":"Other"}]},"item_1_source_id_13":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AA00733561","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":"National Institute of Polar Research"},{"subitem_text_language":"en","subitem_text_value":"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":"1987-03-01"}],"displaytype":"detail","filename":"KJ00000012691.pdf","filesize":[{"value":"2.1 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000012691","url":"https://nipr.repo.nii.ac.jp/record/2138/files/KJ00000012691.pdf"},"version_id":"543c8adf-1f2d-4d59-a055-60a05f5d0a0f"}]},"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":"Tetrataenite phase in Antarctic meteorites","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Tetrataenite phase in Antarctic meteorites","subitem_title_language":"en"}]},"item_type_id":"1","owner":"4","path":["400"],"pubdate":{"attribute_name":"公開日","attribute_value":"1987-03-01"},"publish_date":"1987-03-01","publish_status":"0","recid":"2138","relation_version_is_last":true,"title":["Tetrataenite phase in Antarctic meteorites"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T13:51:25.625207+00:00"}