{"created":"2023-07-25T10:59:31.992432+00:00","id":1226,"links":{},"metadata":{"_buckets":{"deposit":"32027b67-322b-43a0-ac19-bda4ed8d61bf"},"_deposit":{"created_by":4,"id":"1226","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"1226"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00001226","sets":["1:356:374"]},"author_link":["58088","41"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1981-12","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"344","bibliographicPageStart":"333","bibliographicVolumeNumber":"20","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":"Dunn, J.R.","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 paleointensity (F_p) of NRM of the TRM origin can be approximately estimated by comparing the NRM-lost obtained by the stepwise AF-demagnetization of NRM with the ARM-lost obtained by the same AF-demagnetization of the saturated ARM acquired in a magnetic field h_A through a possible relation of (NRM-lost)/F_p=ƒ_0(ARM-lost)/h_A, where NRM is assumed to be identical to a total TRM acquired in F_p, and the coefficient ƒ_0 must be experimentally determined. For ALH-77302 eucrite, F_p can be determined by the method as F_p=0.110/ƒ_0 Oe. However, an experimental determination of f_0 for meteorites is associated with much difficulty caused by chemical and structural alterations of ferromagnetic Fe-Ni metals at elevated temperatures. A three step heating procedure which is a modification of the original TAYLOR's technique (1979) is adopted in the present study with a satisfactory success of not altering the magnetic microscopic coercivity spectrum by heating up to 790℃. The procedure consists of the first heat treatment to rid a meteorite sample of H_2O vapour and loosely-bound gases at 110℃ in a low vacuum space for an hour, the second one to take out tightly-bounded gases at 355℃ in a high vacuum space with the help of the Ti-metal getter to absorb gases for an hour and a half, and then heating to any higher temperature to give pTRM or total TRM on the sample in the same high vacuum system. The f_0 value of ALH-77302 thus obtained is f_0=6.80,and consequently F_p of ALH-77302 eucrite has been obtained as F_p=0.016 Oe. F_p=0.021 Oe for another test specimen of the same eucrite. The paleointensity of ALH-77302 eucrite is therefore approximately 0.02 Oe.","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":"Department of Geological Sciences, University of California"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1981-12-01"}],"displaytype":"detail","filename":"KJ00000011752.pdf","filesize":[{"value":"2.0 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000011752","url":"https://nipr.repo.nii.ac.jp/record/1226/files/KJ00000011752.pdf"},"version_id":"bcab774f-ee7f-414d-8fde-a5bdd43fcd56"}]},"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":"Paleomagnetism of Antarctic achondrites (II)","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Paleomagnetism of Antarctic achondrites (II)","subitem_title_language":"en"}]},"item_type_id":"1","owner":"4","path":["374"],"pubdate":{"attribute_name":"公開日","attribute_value":"1981-12-01"},"publish_date":"1981-12-01","publish_status":"0","recid":"1226","relation_version_is_last":true,"title":["Paleomagnetism of Antarctic achondrites (II)"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T13:58:40.983694+00:00"}