{"created":"2023-07-25T11:01:11.981676+00:00","id":3129,"links":{},"metadata":{"_buckets":{"deposit":"71764f7b-7251-4c44-a410-caa604e88b64"},"_deposit":{"created_by":4,"id":"3129","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"3129"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00003129","sets":["1259:1260:1265:435:441"]},"author_link":["43334","4466","65711","43335"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2003-10","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"226","bibliographicPageStart":"196","bibliographicVolumeNumber":"16","bibliographic_titles":[{"bibliographic_title":"Polar geoscience"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Nzolang, Charles","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kagami, Hiroo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nzenti, Jean Paul","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Holtz, Francois","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 Bantoum area in west Cameroon is composed of migmatitic gneisses associated with parallel strips of amphibolites,quartz-monzonites,biotite-granites, two-mica leucogranites and granitic dikes.Quartz-monzonites are metaluminous (A/CNK=0.8-0.9)I-type,biotite-granites are peraluminous (A/CNK=1.0-1.10)I-type, leucogranites are peraluminous (A/CNK=1.14)S-type granitoids.All are hyper-potassic rocks defining a calc-alkaline trend.Quartz-monzonites gave an Rb-Sr isochron age of 720+-61 Ma assumed to be a mixing age.The thermometry estimated from major elements and zircon saturation indicate that the biotite-granites crystallized from high temperature melts (812-866゜C) whereas leucogranites crystallized from low temperature melts (719-745゜C). The trace element distribution diagrams are characterized by an enrichment in LILE and LREE (5<La_N/Sm_N<17),with negative Nb,Ta,Sr and Ti anomalies. Model initial ^87Sr/^86 Sr ratios (620 Ma)are 0.707614-0.708363 for quartz-monzonites,0.711242-0.713784 for biotite-granites,and 0.715835 for leucogranites.They have highly negative ε_Nd (620 Ma)(-19~-11) and T_DM model ages ranging from 1.9 to 2.9 Ga. These geochemical and isotopic features imply that the granites are generated at different temperatures and from different crustal materials;they are the witnesses of the recycling of a Paleoproterozoic to Archean crust with minor inputs of juvenile magmas during the Pan-African orogeny. Chemical similarities between gneisses and some biotite-granites suggest that the partial melting of these gneisses may have contributed to the formation of granites.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00003129","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":"AA1130866X","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":"Graduate School of Science and Technology, Niigata University"},{"subitem_text_language":"en","subitem_text_value":"Graduate School of Science and Technology, Niigata University"},{"subitem_text_language":"en","subitem_text_value":"Departement des Sciences de la Terre, Universite de Yaounde"},{"subitem_text_language":"en","subitem_text_value":"Institut fur Mineralogie,Universitat Hannover"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2003-10-01"}],"displaytype":"detail","filename":"KJ00000044123.pdf","filesize":[{"value":"3.7 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000044123","url":"https://nipr.repo.nii.ac.jp/record/3129/files/KJ00000044123.pdf"},"version_id":"25a886b7-b27f-4bba-aaff-ac6af6eec4c9"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"granite","subitem_subject_scheme":"Other"},{"subitem_subject":"geochemistry","subitem_subject_scheme":"Other"},{"subitem_subject":"Sr-Nd isotope","subitem_subject_scheme":"Other"},{"subitem_subject":"crustal recycling","subitem_subject_scheme":"Other"},{"subitem_subject":"west-Cameroon","subitem_subject_scheme":"Other"}]},"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":"Geochemistry and preliminary Sr-Nd isotopic data on the Neoproterozoic granitoids from the Bantoum area, west Cameroon: evidence for a derivation from a Paleoproterozoic to Archaean crust","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Geochemistry and preliminary Sr-Nd isotopic data on the Neoproterozoic granitoids from the Bantoum area, west Cameroon: evidence for a derivation from a Paleoproterozoic to Archaean crust"}]},"item_type_id":"1","owner":"4","path":["441"],"pubdate":{"attribute_name":"公開日","attribute_value":"2003-10-01"},"publish_date":"2003-10-01","publish_status":"0","recid":"3129","relation_version_is_last":true,"title":["Geochemistry and preliminary Sr-Nd isotopic data on the Neoproterozoic granitoids from the Bantoum area, west Cameroon: evidence for a derivation from a Paleoproterozoic to Archaean crust"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:34:40.363459+00:00"}