タヒチ島のサンゴ礁掘削試料に基づく南太平洋の過去2万年間の海洋環境復元

2007 Fiscal Year Annual Research Report

• Project/Area Number: 18340163
• Research Institution: Tohoku University
• Principal Investigator: 井龍 康文 Tohoku University, 大学院・理学研究科, 准教授 (00250671)
• Co-Investigator(Kenkyū-buntansha): 川幡 穗高 東京大学, 海洋研究所, 教授 (20356851) ; 松田 博貴 熊本大学, 理学部, 教授 (80274687) ; 横山 祐典 東京大学, 大学院・理学系研究科, 講師 (10359648) ; 杉原 薫 福岡大学, 理学部, 助教 (90320275) ; 藤田 和彦 琉球大学, 理学部, 助教 (00343377)
• Keywords: 海水準変動 / 後氷期 / サンゴ礁 / 融氷パルス / タヒチ

Research Abstract

国際統合深海掘削計画第310次航海(タヒチ島の海水準変動)に関する,今年度の特筆すべき成果は以下である.
1."Proceedings of the Integrated Ocean Drilling Program, Volume 310 Expedition Reports, Tahihi Sea Level"の出版.
本書は,DSDPやODPのIninital Reportに相当するものであるが,印刷物は作製されず,DVD出版ならびにWeb出版(doi: 10.2204/iodp. proc. 310. 2007, http://publications.iodp.org/proceedings/310/310toc.htm)という形で公開されている.
2.科学成果の速報
2007年春までに得られた成果をScientific Drilling誌に公表した.
3.2nd Post Expedition Meetingの開催
2007年11月12日〜16日に,タヒチ島で,2nd Post Expedition Meetingを開催した.その際に発表された成果ならびに問題点は,以下のようにまとめられる(研究代表者・分担者が関連する研究のみ).
1)タヒチ島では融氷パルスMWP-1B(約11,500年前)に対応づけられる急激な海水準上昇は認められない可能性が高い.
2)ウラン系列年代や14C年代が報告されたが,それらの試料の堆積水深が精度よく決定されておらず,"満足できる"海水準変動曲線は得られていない.
3)サンゴ骨格の酸素同位体や微量元素濃度のデータを海水温に変換するために,タヒチ島産現生サンゴの骨格記録に関する研究が必須である.
4)更新世の炭酸塩堆積物は,ウラン系列年代,無節サンゴモ・底生有孔虫による古水深推定,古地磁気データを総合すると,MIS10〜5に対比されると思われる.

Research Products

• [Journal Article] Rapid subsidence of the Kikai Seamount inferred from drowned Pleistocene coral limestone: Implication for subduction of the Amami Plateau, northern Philippine Sea. (2008)
  • Author(s): Nakazawa, T., Nishimura, A., Iryu, Y., Yamada, T., Shibasaki, H. & Shiokawa'S.
  • Journal Title: Marine Geology 247 Pages: 35-45
  • Peer Reviewed
• [Journal Article] The COral-REef Front(COREF)Project. (2007)
  • Author(s): Iryu, Y., Matsuda, H., Machiyama, H., Piller, W. E., Quinn, T. M. & Mutti, M.
  • Journal Title: Scientific Drilling 5 Pages: 58-60
• [Journal Article] IODP Expedition 310 Reconstructs Sea Level, Climatic, and Environmental Changes in the South Pacific during the Last Deglaciation. (2007)
  • Author(s): Camoin, G. F., Iryu, Y., McInroy, D. B. & the Expedition 310 Scientists
  • Journal Title: Scientific Drilling 5 Pages: 4-12
• [Journal Article] Carbonate deposits on submerged seamounts in the northwestern Pacific Ocean. (2007)
  • Author(s): Takayanagi, H., Iryu, Y., Yamada, T., Oda, M., Yamamoto, K., Sato, T., Chiyonobu, S., Nishimura, A., Nakazawa, T. & Shiokawa, S.
  • Journal Title: Island Arc 5 Pages: 394-419
  • Peer Reviewed
• [Journal Article] Relation between acid dissolution time in the vacuum test tube and time required for graphitization for AMS target preparation. (2007)
  • Author(s): Yokoyama, Y., Miyairi, Y., Matsuzaki, H., & Tsunomori, F.
  • Journal Title: Nuclear Instruments and Methods in Physics Research B 259 Pages: 330-334
  • Peer Reviewed
• [Journal Article] Improvement of the 36Cl-AMS system at MALT using a Monte-Carlo ion-trajectory simulation in a gas-filled magnet. (2007)
  • Author(s): Aze, T., Matsuzaki, H., Matsumura, H., Nagai, H., Fujimura, M., Noguchi, M., Hongo, Y., & Yokoyama Y.
  • Journal Title: Nuclear Instruments and Methods in Physics Research B 259 Pages: 144-148
  • Peer Reviewed
• [Presentation] IODP Expedition 310タヒチ沖における微生物岩の産状と初期続成作用. (2007)
  • Author(s): 松田博貴・山田 努・町山栄章・Camoin G. F. ・井龍康文・McInroy, D. B. ・Expedition 310 Scientists
  • Organizer: 日本地質学会第114年学術大会
  • Place of Presentation: 札幌
  • Year and Date: 20070909-11
• [Presentation] Microbialite-dominated coral reefs as response to abrupt environmental changes during the last deglacial sea-level rise.IODP Expedition #310, Tahiti. (2007)
  • Author(s): Heindel, K., Westphal, H., Camoin, G., Seard, C., Birgel, D., Peckmann, J. & IODP Expedition 310 Scientists
  • Organizer: European Geosciences Union, General Assembly
  • Place of Presentation: Vienna, Austria
  • Year and Date: 20070415-20
• [Presentation] Sea-level rise, climatic changes and reef development during the last deglaciation. Preliminary results from the IODP Expedition 310 "Tahiti Sea Level". (2007)
  • Author(s): Camoin G., Iryu Y., McInroy D. & Expedition 310 Scientists
  • Organizer: European Geosciences Union, General Assembly
  • Place of Presentation: Vienna, Austria
  • Year and Date: 20070415-20
• [Presentation] Microbialites: a major component of the last deglacial reef sequence from Tahiti. Environmental significance and sedimentological roles. (2007)
  • Author(s): Camoin, G., Westphal, H., Seard, C., Heindel, K., Yokoyama, Y., Matsuzaki, H., Webster, J. & Expedition 310 Scientists
  • Organizer: European Geosciences Union, General Assembly
  • Place of Presentation: Vienna, Austria
  • Year and Date: 20070415-20
• [Presentation] Sub-seasonal reconstructions of South Pacific climate during the last deglaciation from Tahiti corals-Preliminary results from IODP Expedition 310. (2007)
  • Author(s): Felis, T., Asami, R., Deschamps, P., Kolling, M., Durand, N., Bard, E. & IODP Expedition 310 Scientists
  • Organizer: European Geosciences Union, General Assembly
  • Place of Presentation: Vienna, Austria
  • Year and Date: 20070415-20
• [Presentation] New evidence for the existence of the MWP-1A from a "far-field" site-Preliminary results from the Tahiti IODP Expedition 310 (2007)
  • Author(s): Deschamps, P., Durand, N., Bard, E., Hamelin, B., Camoin, G, Thomas, A. L., Henderson, G. M., Yokoyama, Y. & IODP Expedition 310 Scientists
  • Organizer: European Geosciences Union, General Assembly
  • Place of Presentation: Vienna, Austria
  • Year and Date: 20070415-20
• [Presentation] "ODP and IODP contributions to reef studies" (2007)
  • Author(s): 井龍康文
  • Organizer: 石油産業におけるIODP(統合国際深海掘削計画)の活用に関するワークショップ
  • Place of Presentation: 新橋
  • Year and Date: 2007-07-26
• [Presentation] 深海掘削計画史上初のサンゴ礁における浅層多孔掘削 -IODP 第 310 次航海「Tahiti Sea Level」の成果. (2007)
  • Author(s): 井龍康文
  • Organizer: 第3回IPDP成果報告会
  • Place of Presentation: 新橋
  • Year and Date: 2007-05-25
• [Book] Proceedings of the Integrated Ocean Drilling Program, Volume 310. (2007)
  • Author(s): Camoin, G. F., Iryu, Y., McInroy, D. B. & the Expedition 310 Scientists
  • Publisher: Integrated Ocean Drilling Program Management International, Inc., Washington,(DVD, Web出版)