{"created":"2021-03-01T06:14:45.319387+00:00","id":11855,"links":{},"metadata":{"_buckets":{"deposit":"31d8437c-f439-44c9-8103-f0d59d52d2db"},"_deposit":{"id":"11855","owners":[],"pid":{"revision_id":0,"type":"depid","value":"11855"},"status":"published"},"_oai":{"id":"oai:soar-ir.repo.nii.ac.jp:00011855","sets":["1169:1170"]},"author_link":["36310","36311","36312"],"item_1628147817048":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_6_alternative_title_1":{"attribute_name":"その他（別言語等）のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"紀伊半島四万十帯,上部白亜系美山層中に見いだされた海洋地殻断片"}]},"item_6_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1997-06-30","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"109","bibliographicPageStart":"100","bibliographicVolumeNumber":"48","bibliographic_titles":[{"bibliographic_title":"地質学論集"}]}]},"item_6_description_20":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"An oceanic fragment comprising a complete pelagic sequence from basalt through chert to red shale was found in the Miyama Formation of the Shimanto Belt which is a typical accretion complex in Japan. The conformable sequence, from base, consists of MORB-type basalt, micritic limestone, CCH-type chert, TCH-type chert, MCH-type chert and red shale. CCH chert is alternating beds of calcareous chert and opaque-tuffaceous layers. TCH chert is non-calcareous interbedded chert with opaque-tuffaceous parting. MCH chert is bedded chert intercalated with clay parting. Radiolarian biostratigraphy confirmed that the sequence was continuous from Hauterivian-Barremian to Turonian-early Coniacian time. There also are systematic changes in geochemistry such as decreasing of negative Ce anomaly. These continuous changes of lithology might be due to the changes of depositional regime, that is, from the mid-oceanic ridge, ridge proximal regime above CCD, a slightly distant regime from the ridge, distant regime from ridge and approaching to a contiment, and continental margin regime where hemipelagic sediments accumulated. The depositional regime had moved away from a mid-oceanic ridge to near a trench by ocean spreading in Paleopacific ocean. The complete sequence provides kcy information to reconstruct the original situations of chert and accretion complex in the Shimanto Belt. MORB型の玄武岩から, ミクライト質石灰岩・層状チャートを経て, 半遠洋性の赤色泥岩にいたる連続的な遠洋性堆積物の重なりが, 紀伊半島の上部白亜系美山層中に見いだされた。チャートは, 下位からCCH, TCH, MCHの3つのタイプに岩質上細分される。CCH型は, 石灰質チャートと不透明鉱物に富む凝灰質層との互層であり, TCH型は非石灰質のチャートと不透明鉱物に富む凝灰質層と互層である。MCH型は非石灰質チャートと粘土鉱物を主体とする泥質薄層との繰り返しである。これらの重なりは, 放散虫化石の検討により, Hauterivian-BarremianからTuronian-early Coniacianにかけての連続した堆積物であることが確認された。また, 化学組成の検討から, Ceの負異常が系統的に減少していくことも認められた。このような岩質および化学組成の系統的な変化は, もともと中央海嶺付近にあった堆積場が, 古太平洋の海洋拡大によって徐々に中央海嶺から離れ, 水深を増加させてCCDよりも深くなり, かつ, 徐々に陸域に近づいていった過程を反映したものと解釈される。この遠洋性の重なりをもった海洋地殻の断片は, 四万十帯堆積物の起源や付加過程の解明に重要な情報をもたらすものである。","subitem_description_type":"Abstract"}]},"item_6_description_30":{"attribute_name":"資源タイプ（コンテンツの種類）","attribute_value_mlt":[{"subitem_description":"Article","subitem_description_type":"Other"}]},"item_6_description_5":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"地質学論集. 48:100-109 (1997)","subitem_description_type":"Other"}]},"item_6_link_3":{"attribute_name":"信州大学研究者総覧へのリンク","attribute_value_mlt":[{"subitem_link_text":"Kumon, Fujio","subitem_link_url":"http://soar-rd.shinshu-u.ac.jp/profile/ja.ZUchOUkh.html"}]},"item_6_publisher_4":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本地質学会"}]},"item_6_relation_51":{"attribute_name":"異版である","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"http://ci.nii.ac.jp/naid/110003025981/","subitem_relation_type_select":"URI"}}]},"item_6_rights_62":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"日本地質学会"},{"subitem_rights":"本文データは学協会の許諾に基づきCiNiiから複製したものである"}]},"item_6_source_id_35":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0385-8545","subitem_source_identifier_type":"ISSN"}]},"item_6_source_id_40":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00141779","subitem_source_identifier_type":"NCID"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kumon,  Fujio"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Matsuyama,  Hisanori"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Musashino,  Makoto"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2015-09-28"}],"displaytype":"detail","filename":"chishitsuron_48-1.pdf","filesize":[{"value":"1.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"chishitsuron_48-1.pdf","url":"https://soar-ir.repo.nii.ac.jp/record/11855/files/chishitsuron_48-1.pdf"},"version_id":"96548bdc-05d1-4268-9791-fc4cbe1cc78e"}]},"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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"An oceanic fragment in the Upper Cretaceous Miyama Formation of the Shimanto Belt, Kii Peninsula, Japan","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"An oceanic fragment in the Upper Cretaceous Miyama Formation of the Shimanto Belt, Kii Peninsula, Japan","subitem_title_language":"en"}]},"item_type_id":"6","owner":"1","path":["1170"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2011-04-14"},"publish_date":"2011-04-14","publish_status":"0","recid":"11855","relation_version_is_last":true,"title":["An oceanic fragment in the Upper Cretaceous Miyama Formation of the Shimanto Belt, Kii Peninsula, Japan"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-14T04:13:13.862314+00:00"}