{"created":"2023-07-25T10:59:57.337114+00:00","id":1731,"links":{},"metadata":{"_buckets":{"deposit":"66779271-ec34-4c7a-afba-826b07ad1460"},"_deposit":{"created_by":4,"id":"1731","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"1731"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00001731","sets":["1:356:389"]},"author_link":["1380"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1984-12","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"284","bibliographicPageStart":"272","bibliographicVolumeNumber":"35","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":"Kaneoka, Ichiro","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":"Based on the Ar-degassing patterns from the Antarctic meteorites, it is intended to find some relationships between the types of Ar-degassing and the states of Antarctic meteorites. For this purpose, diffusion parameters (D/α^2,E) were obtained for each meteorite by using the ^<39>(Ar)-degassing pattern which had been obtained when those meteorites had been dated by the ^<40>(Ar)-^<39>(Ar) method. The diffusion constants (D/α^2) are estimated to be (0.2-3)×(10)^<-5> s^<-1> at 1000℃. The activation energies (E) range from about 10 to 50 kcal/mole, but mostly 20 to 40 kcal/mole. Nonequilibrated chondrites seem to have lower activation energies than equilibrated chondrites. On the basis of integrated fraction of Ar, a diagram is exploited to compare relative degassing patterns of Ar between neutron induced K-derived ^<39>(Ar) and the others (^<36>(Ar), ^<37>(Ar), ^<40>(Ar)). According to the Ar-degassing patterns in this diagram, the Antarctic meteorites are classified into three Types, A, B and C. It is found that achondrites are generally classified into Type A, where ^<40>(Ar) correlates well with ^<39>(Ar) and ^<36>(Ar) (and ^<37>(Ar)) degass at slightly higher temperatures than ^<39>(Ar). Chondrites are classified into Type B, where ^<40>(Ar) correlates with ^<39>(Ar), but ^<36>(Ar) (and ^<37>(Ar)) degass at definitely higher temperatures than ^<39>(Ar). Weathered achondrites and chondrites are generally grouped into Type C, where ^<40>(Ar) does not correlate with ^<39>(Ar) and degassing patterns of ^<36>(Ar) and ^<37>(Ar) are also non-systematic. Thus, such classification would give another measure to evaluate the reliability of an ^<40>(Ar)-^<39>(Ar) age obtained in addition to conventional criteria.","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":"Geophysical Institute, Faculty of Science, University of Tokyo"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1984-12-01"}],"displaytype":"detail","filename":"KJ00000012363.pdf","filesize":[{"value":"1.8 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"url":"https://nipr.repo.nii.ac.jp/record/1731/files/KJ00000012363.pdf"},"version_id":"a3e46457-7cfc-4a30-97b2-67b9e90d100f"}]},"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":"Characterization of Ar-degassing from Antarctic meteorites","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Characterization of Ar-degassing from Antarctic meteorites","subitem_title_language":"en"}]},"item_type_id":"1","owner":"4","path":["389"],"pubdate":{"attribute_name":"公開日","attribute_value":"1984-12-01"},"publish_date":"1984-12-01","publish_status":"0","recid":"1731","relation_version_is_last":true,"title":["Characterization of Ar-degassing from Antarctic meteorites"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T13:52:53.292203+00:00"}