{"created":"2023-07-25T10:59:40.675676+00:00","id":1399,"links":{},"metadata":{"_buckets":{"deposit":"25f2f411-69e1-4d94-a55d-da1725bbb9b2"},"_deposit":{"created_by":4,"id":"1399","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"1399"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00001399","sets":["1:356:379"]},"author_link":["56652","1721","836","65501"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1982-12","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"330","bibliographicPageStart":"319","bibliographicVolumeNumber":"25","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":"Fujii, Naoyuki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Miyamoto, Masamichi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kobayashi, Yoji","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ito, Keisuke","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":"The irregular shape and anisotropic orientation of Fe-Ni grains are quantitatively described in eight ordinary chondrites from Antarctica. The chondrites studied include three H types : ALH-77233 (H4), ALH-77182 (H5) and ALH-77115 (H6); four L types : Y-74191 (L3), ALH-77230 (L4), ALH-77254 (L5) and ALH-78105 (L6) and one LL type : Y-75258 (LL6). The axial ratio (b/a), where a and b are the longest and semi-major axial lengths respectively, the area (S), and the circumferencial length (l) with appropriate divider opening (d) are measured for each Fe-Ni grain. The orientation distribution of the longest axis indicates that L chondrites are more anisotropic than H chondrites, though the number of grains is limited. The shape parameter defined by l/√<S> is used as a quantitative indicator for the shape irregularity of Fe-Ni grains. Though the value of the shape parameter depends on d, it increases with the area for each chondrite with a fixed d of 0.01 mm. The fractal dimension is estimated by -(log N)/(log d), where N is the number of segments for circumferencial length and d is varied from 0.01 mm to 0.15 mm. The fractal dimensions thus obtained for several grains in H4,H6,L4 and L6 chondrites are all about 1.4 and do not appreciably differ from each other. It means that the irregularity of the shape of Fe-Ni grains is self-similar in the range of d used. The average value of the shape parameter (S.P.) for each sample is defined as l/(n×ΣS)^<1/2>, and appears to decrease with the increase of petrologic types from 4 to 6 for both H and L chondrites. The value of S.P. and the volume fraction of Fe-Ni grains correspond more or less well with the strength represented by the vibrational fracturing rate measurements (FUJII et al., Mem. Natl Inst. Polar Res., Spec. Issue, 20,362,1981).","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":"Department of Earth Sciences, Faculty of Science, Kobe University/Department of Pure and Applied Sciences, College of General Education, University of Tokyo/Department of Earth Sciences, Faculty of Science, Kobe University/Department of Earth Sciences, Faculty of Science, Kobe University"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1982-12-01"}],"displaytype":"detail","filename":"KJ00000012033.pdf","filesize":[{"value":"2.0 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000012033","url":"https://nipr.repo.nii.ac.jp/record/1399/files/KJ00000012033.pdf"},"version_id":"17cf5c9f-aaec-40fa-99c0-c0a1955cc74b"}]},"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":"On the shape of Fe-Ni grains among ordinary chondrites","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"On the shape of Fe-Ni grains among ordinary chondrites","subitem_title_language":"en"}]},"item_type_id":"1","owner":"4","path":["379"],"pubdate":{"attribute_name":"公開日","attribute_value":"1982-12-01"},"publish_date":"1982-12-01","publish_status":"0","recid":"1399","relation_version_is_last":true,"title":["On the shape of Fe-Ni grains among ordinary chondrites"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T13:50:55.789242+00:00"}