{"created":"2023-07-25T11:02:28.133296+00:00","id":4710,"links":{},"metadata":{"_buckets":{"deposit":"e975bb52-2ba1-4dd1-b046-8269441c8e24"},"_deposit":{"created_by":4,"id":"4710","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"4710"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00004710","sets":["1259:1260:1264:584:593"]},"author_link":["44297","44295","8047","44296"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1996-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"236","bibliographicPageStart":"218","bibliographicVolumeNumber":"9","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":"Yada,Toru","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nakamura,Tomoki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Sekiya,Minoru","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Takaoka,Nobuo","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":"Spherules collected from deep-sea sediments were analyzed for major chemical compositions and examined for textural relationships. Two main types of internal texture are observed in Ni-bearing I-type spherules : spherules with Ni-free Fe-oxide mantle and Fe-Ni metallic cores and Fe-Ni oxide spherules without metallic cores. Cores are often observed off-centered. S-type spherules show porphyritic, barred, and fine-grained types of texture. Relict olivine grains are found in some porphyritic S-type spherules. A cooling rate of 55℃/s was calculated for one of these grains based on chemical zonal patterns. For I-type spherules, numerical simulations were performed to constrain the relationship between temperatures, radii of spherules, and the apparent gravitational acceleration with the spherule as a stationary frame of reference. Results indicate that a) spherules lose most of their original mass by evaporation over 1900℃, and, b) the apparent gravitational acceleration is at a maximum during the last stage of evaporation. Based on the observations and numerical simulations of I-type spherules, we propose the following model for their formation : during ablation, the metallic core is off-centered, a surface of the core is then exposed to the air due to the strong apparent gravitational acceleration and, finally, oxidation reactions can proceed on the exposed core surface.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00004710","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, Kyushu University/Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University/Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University/Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1996-03-01"}],"displaytype":"detail","filename":"KJ00000036516.pdf","filesize":[{"value":"2.3 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000036516","url":"https://nipr.repo.nii.ac.jp/record/4710/files/KJ00000036516.pdf"},"version_id":"daf7097d-4fad-4dcd-ab50-69cce21a65a9"}]},"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":"Formation processes of magnetic spherules collected from deep-sea sediments -Observations and numerical simulations of the orbital evolution-","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Formation processes of magnetic spherules collected from deep-sea sediments -Observations and numerical simulations of the orbital evolution-"}]},"item_type_id":"1","owner":"4","path":["593"],"pubdate":{"attribute_name":"公開日","attribute_value":"1996-03-01"},"publish_date":"1996-03-01","publish_status":"0","recid":"4710","relation_version_is_last":true,"title":["Formation processes of magnetic spherules collected from deep-sea sediments -Observations and numerical simulations of the orbital evolution-"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:17:02.027114+00:00"}