Age model of core sediments taken by D/V CHIKYU during the shakedown cruises off Shimokita Peninsula
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- Domitsu Hanako
- Department of Ecosystem Studies, School of Environmental Science, The University of Shiga Prefecture
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- Nishi Hiroshi
- Department of Natural History Sciences, Faculty of Science, Hokkaido University
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- Uchida Junichi
- OYO Corporation
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- Oda Motoyoshi
- Institute of Geology and Paleontology, Graduate School of Science, Tohoku University
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- Ogane Kaoru
- Institute of Geology and Paleontology, Graduate School of Science, Tohoku University
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- Taira Asahiko
- Japan Agency for Marine-Earth Science and Technology
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- Aoike Kan
- Geological Evaluation Group, Marine Operation Department, Center for Deep Earth Exploration (CDEX), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama Institute for Earth Science
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- Shimokita Microfossil Research Group
- Geological Evaluation Group, Marine Operation Department, Center for Deep Earth Exploration (CDEX), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama Institute for Earth Science
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- 相田 吉昭
- 宇都宮大学農学部生物生産科学科
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- 秋元 和實
- 熊本大学沿岸域環境科学教育研究センター
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- 林 広樹
- 島根大学総合理工学部
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- 長谷川 四郎
- 熊本大学大学院自然科学研究科
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- 北里 洋
- 独立行政法人海洋開発機構
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- 岩井 雅夫
- 高知大学理学部
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- 池原 実
- 高知大学海洋コア総合研究センター
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- 丸山 俊明
- 山形大学理学部地球環境学科
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- 岡田 尚武
- 北海道大学
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- 大井 剛志
- 熊本大学大学院自然科学研究科
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- 佐藤 時幸
- 秋田大学工学資源学部地球資源学科
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- 酒井 豊三郎
- 宇都宮大学農学部生物生産科学科
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- 鈴木 紀毅
- 東北大学大学院理学研究科
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- 谷村 好洋
- 国立科学博物館地学研究部
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- 高嶋 礼詩
- 北海道大学創成研究機構
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- 山崎 誠
- 秋田大学工学資源学部地球資源学科
Bibliographic Information
- Other Title
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- 地球深部探査船「ちきゅう」の下北半島沖慣熟航海コア試料の年代モデル
- チキュウ シンブ タンサセン チキュウ ノ シモキタ ハントウオキ カンジュク コウカイ コア シリョウ ノ ネンダイ モデル
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Description
Three continuous cores of 47m, 71m and 365m in thickness were recovered from the subseafloor at about 1200m water depth at Holes C9001A, C9002A/B and C9001C/D during D/V CHIKYU shakedown cruises of CK05-04 Leg 2 (16 November-14 December 2005) and CK06-06 (6 August-29 October 2007). The core sediments are composed mainly of diatomaceous silty clay, and are divided into four lithologic units from Units A to D at Hole C9001C. The Unit A is characterized by common intercalations of tephra/sand and higher magnetic susceptibility (MS), while the Unit B is rare in tephra/sand intercalations with lower MS. The Unit C is composed of unconsolidated sands, and the Unit D is similar in lithology with the Unit A. The integrated stratigraphy of micropaleontology, tephrochronology and magnetostratigraphy suggest that the bottom age of Hole C9001C core is correlated with the base of the Brunhes Chron (Chron C1n) that is assigned to about 780ka (Middle Pleistocene). The geological age of Hole C9001D ranges from 1.05 to 1.65Ma (Early Pleistocene). The oxygen isotope stages from Marine Isotope Stage (MIS) 1 to MIS 18 are recognized in Hole C9001C based on the correlation with a standard isotope curve, and these data accord well with the results of biostratigraphy and magnetostratigraphy. The Unit A ranges from MIS 1 to MIS 8 (about 300ka), and Unit B spans from MIS 9 to MIS 16 (300ka-640ka). The Units C and D are assigned to MIS 17 and MIS 18, respectively. Hole C9001C core has a continuous sequence without hiatus although a disturbance layer occurs around 150mbsf. Thus, the Shimokita cores have a strong potential to improve biochronology and revise geological time scales for the past 800kyr in the Northwest Pacific region.
Journal
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- Fossils
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Fossils 87 (0), 47-64, 2010
Palaeontological Society of Japan
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Details 詳細情報について
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- CRID
- 1390001204434254976
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- NII Article ID
- 110007593295
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- NII Book ID
- AN00041606
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- ISSN
- 24242632
- 00229202
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- NDL BIB ID
- 10670146
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
- Crossref
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- Abstract License Flag
- Disallowed