{"created":"2023-07-25T11:02:16.043636+00:00","id":4480,"links":{},"metadata":{"_buckets":{"deposit":"f228c429-5007-4511-8373-428773cf2861"},"_deposit":{"created_by":4,"id":"4480","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"4480"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00004480","sets":["1259:1260:1264:584:586"]},"author_link":["7868"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1989-10","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"146","bibliographicPageStart":"109","bibliographicVolumeNumber":"2","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":"Ikeda, Yukio","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":"Opaque-mineral nodules in Y-691 consist mainly of kamacite, perryite, schreibersite, troilite, daubreelite, niningerite, oldhamite, sphalerite, djerfisherite, caswellsilverite, graphite, roedderite, a silica mineral, albite, enstatite, and forsterite. The Ni and Si contents of kamacite are 2-3.5wt% and about 2wt%, respectively, being controlled by exsolution of perryite and schreibersite. Troilite shows a wide range of the Cr contents from 2.4 to 0.05wt%, and is classified into two types, massive and porous. The massive troilite is high in the Cr contents more than 0.6wt% and contains sometimes thin daubreelite lamellae, although the porous troilite is low in the Cr contents less than 1.2wt% and nearly free from daubreelite lamellae. The porous texture seems to be due to tiny inclusions of FeCl_2 in the troilite. Niningerite in Y-691 is the lowest in Mn and Fe contents in comparison to those in other enstatite chondrites. Djerfisherite in Y-691 is richer in Cu, Ni and Na in comparison to those in Qingzhen. Roedderite in Y-691 is similar in chemical composition to that in Indarch. Enstatite in Y-691 nodules shows a wide range of MgO/(MgO+FeO) molar ratio from 0.91 to 0.99,and sometimes forsterite occurs with a silica mineral in a nodule, suggesting that the silicates in the opaque-mineral nodules were not in equilibrium. Opaque-mineral nodules were classified into two main types based on the texture; concentric and massive, which are further divided into subtypes based on the modal volume of the main-minerals. The constituent minerals in these nodules seem to have polygenesis, and the genesis of nodules is discussed in detail. Any thermal metamorphic effects after accretion was not petrographycally detected in Y-691 nodules.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00004480","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 Sciences, Faculty of Science, Ibaraki University"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1989-10-01"}],"displaytype":"detail","filename":"KJ00000036286.pdf","filesize":[{"value":"5.0 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000036286","url":"https://nipr.repo.nii.ac.jp/record/4480/files/KJ00000036286.pdf"},"version_id":"635fdcad-095a-4d74-a099-aa7e1f3395e2"}]},"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":"Petrochemical study of the Yamato-691 enstatite chondrite (E3) IV: Descriptions and mineral chemistry of opaque-mineral nodules","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Petrochemical study of the Yamato-691 enstatite chondrite (E3) IV: Descriptions and mineral chemistry of opaque-mineral nodules"}]},"item_type_id":"1","owner":"4","path":["586"],"pubdate":{"attribute_name":"公開日","attribute_value":"1989-10-01"},"publish_date":"1989-10-01","publish_status":"0","recid":"4480","relation_version_is_last":true,"title":["Petrochemical study of the Yamato-691 enstatite chondrite (E3) IV: Descriptions and mineral chemistry of opaque-mineral nodules"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:20:08.514359+00:00"}