{"created":"2021-03-01T06:09:41.964738+00:00","id":5826,"links":{},"metadata":{"_buckets":{"deposit":"61acbbd2-881e-4da4-81cf-07e7fc12fbdb"},"_deposit":{"id":"5826","owners":[],"pid":{"revision_id":0,"type":"depid","value":"5826"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00005826","sets":["453:455","468:563:564"]},"item_6_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"西南日本カンパニアン : マーストリヒチアン階和泉層群における大型化石 : 微化石統合生層序 : 中国東北部ソンリャオ堆積盆地に分布する陸成層との年代層序対比に向けて"}]},"item_6_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2016-09-20","bibliographicIssueDateType":"Issued"},"bibliographic_titles":[{}]}]},"item_6_date_granted_51":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2016-09-20"}]},"item_6_degree_grantor_49":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"新潟大学"}]}]},"item_6_degree_name_48":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（理学）"}]},"item_6_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The Cretaceous was a time of long-term climate stability with warm equable climates resulting　from higher atmospheric greenhouse gas content by volcanic activity. However, it is insisted the　global cooling had occurred during the Campanian–Maastrichtian by recent works. To discuss　the relationship between biota and the global cooling in the future, we need to establish a precise　chronostratigraphic framework during the Campanian–Maastrichtian.　The Izumi Group is the upper Cretaceous marine deposit distributed in southwest Japan. This　group yields mollusk, radiolarian, and terrestrial-derived palynomorphs such as spores and　pollen. Therefore, the Izumi Group is favorable to establish an integrated mega- and microbiostratigraphy　that is applicable to the Campanian–Maastrichtian pelagic and terrestrial deposits　and/or enables to correlate between them. This study considers lateral extension of molluscan　zone, compositional changes of radiolarian assemblage, and palynomorph biostratigraphic\\nframework for establishment of the integrated biostratigraphy.　The Izumi Group is divided into three lithofacies: the Northern Marginal Facies (NMF), the　Main Facies (MF), and the Southern Facies (SF). The NMF accumulated contemporaneously\\nwith the MF in different place within the basin. Most of the molluscan specimens and biozones　have been recognized in the NMF. Meanwhile, radiolarian zones are established by specimens　occurring mainly in the MF. Thus, molluscan biostratigraphy is applicable only to the NMF,　whereas radiolarian one is available only to the MF. To integrate both biostratigraphies,　chronozones based on the time spans of molluscan zones are proved to be effective on both　facies. The Pravitoceras sigmoidale Zone within the NMF extends to the MF and thickens　toward southwestern direction. In this case, the P. sigmoidale Chronozone also continues from　the NMF to the MF. It is interpretable that chronozones based on other molluscan zones continue　into both lithofacies as well as the P. sigmoidale Chronozone. In other words, these chronozones　are applicable to the MF and/or radiolarian zones. Thus, molluscan biostratigraphy enable to　integrate with radiolarian one.　To apply the integrated biostratigraphy to pelagic deposits, we need to understand　compositional changes of Cretaceous radiolarian assemblage toward lateral direction. This study　examined it within the P. sigmoidale and/or Stichomitra cechena zones.","subitem_description_type":"Abstract"},{"subitem_description":"Radiolarian assemblages appear from the NMF (inshore deposits) and MF (offshore deposits). Some species appear from　both lithofacies. In addition, discoidal Spumellarian radiolarians are dominated in the　assemblages from the NMF, while they are scarce in the assemblages from the MF. Nassellarian　radiolarians appear characteristically in the later lithofacies. These tendencies of compositional　change help to correlate radiolarian assemblages between the Izumi Group and pelagic deposits.　It is expected that Nassellarian radiolarians are main component, while discoidal Spumellarian　species are scarce in pelagic assemblages.　Based on the first occurrences of marker genera and species of the genus Aquilapollenites,　four palynomorph interval zones are defined in the Izumi Group (in ascending order): the　Polyvestibulopollenites–Tricolporopollenites (P–T), Betulaepollenites–Graminidites (B–G),　Ulmipollenites–Toroisporis (U–T), and Aquilapollenites–Hymenophyllumsporites (A–H) interval　zones. The B–G/U–T zonal boundary is regarded as the same stratigraphic position of the P.awajiensis/N. hetonaiense boundary. In other words, the B–G/U–T zonal boundary approximates　the C/M boundary within the Izumi Group.　The SK1 (N) that is one of the core samples obtained from centre of the Songliao Basin. Four　palynomorph interval zones are re-established in the study section within the SK1 (N) (680.0–862.0\\nm depth) to correlate with palynomorph assemblages of the Izumi Group (in ascending order): the　Liliacidites–Jianghanpollis (L–J), Chenopodipollis–Aquilapollenites (C–A), Translucentipollis–Toroisporis (T–T), and Betulaceoipollenites–Tsugaepollenites (B–T) interval zones. Judging from　co-occurring genera and species, the C–A/T–T zonal boundary could coincide with the B–G/U–T\\nzonal boundary within the Izumi Group. In this case, it is implied that the former boundary　corresponds with the Pachydiscus awajiensis/Nostoceras hetonaiense and/or C/M boundaries.　These results suggest that the C/M boundary within the SK1 (N) could be at 748.5 m depth according　to palynomorph biostratigraphic correlation with the Izumi Group.","subitem_description_type":"Abstract"}]},"item_6_description_5":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"学位の種類: 博士（理学）. 報告番号: 甲第4232号. 学位記番号: 新大院博（理）甲第416号. 学位授与年月日: 平成28年9月20日","subitem_description_type":"Other"}]},"item_6_description_53":{"attribute_name":"学位記番号","attribute_value_mlt":[{"subitem_description":"新大院博（理）甲第416号","subitem_description_type":"Other"}]},"item_6_dissertation_number_52":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"13101甲第4232号"}]},"item_6_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"50940","nameIdentifierScheme":"WEKO"}],"names":[{"name":"吉野, 恒平"}]}]},"item_6_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"新潟大学"}]},"item_6_select_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"ETD"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Yoshino, Kohei"}],"nameIdentifiers":[{"nameIdentifier":"50939","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-08-05"}],"displaytype":"detail","filename":"h28fsk416.pdf","filesize":[{"value":"46.6 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"本文","url":"https://niigata-u.repo.nii.ac.jp/record/5826/files/h28fsk416.pdf"},"version_id":"16ee0c42-09b5-4055-85bb-209f79acb775"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-08-05"}],"displaytype":"detail","filename":"h28fsk416_a.pdf","filesize":[{"value":"217.9 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"要旨","url":"https://niigata-u.repo.nii.ac.jp/record/5826/files/h28fsk416_a.pdf"},"version_id":"cf8a4b57-edd0-4677-b8f9-bf4ccc38d72a"}]},"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":"thesis","resourceuri":"http://purl.org/coar/resource_type/c_46ec"}]},"item_title":"Integrated Mega- and Micro- Biostratigraphy of the Campanian–Maastrichtian Izumi Group, Southwest Japan : Toward chronostratigraphic correlation with non-marine deposits in the Songliao Basin, Northeast China","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Integrated Mega- and Micro- Biostratigraphy of the Campanian–Maastrichtian Izumi Group, Southwest Japan : Toward chronostratigraphic correlation with non-marine deposits in the Songliao Basin, Northeast China"},{"subitem_title":"Integrated Mega- and Micro- Biostratigraphy of the Campanian–Maastrichtian Izumi Group, Southwest Japan : Toward chronostratigraphic correlation with non-marine deposits in the Songliao Basin, Northeast China","subitem_title_language":"en"}]},"item_type_id":"6","owner":"1","path":["455","564"],"pubdate":{"attribute_name":"公開日","attribute_value":"2016-12-07"},"publish_date":"2016-12-07","publish_status":"0","recid":"5826","relation_version_is_last":true,"title":["Integrated Mega- and Micro- Biostratigraphy of the Campanian–Maastrichtian Izumi Group, Southwest Japan : Toward chronostratigraphic correlation with non-marine deposits in the Songliao Basin, Northeast China"],"weko_creator_id":"1","weko_shared_id":2},"updated":"2022-12-15T03:39:03.407239+00:00"}