Sea-level reconstructions during the last deglaciation in the Great Barrier Reef region based on large benthic foraminiferal asssemblages

• Project/Area Number: 22740339
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Stratigraphy/Paleontology
• Research Institution: University of the Ryukyus
• Principal Investigator: FUJITA Kazuhiko 琉球大学, 理学部, 准教授 (00343377)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: グレートバリアリーフ / 古水深 / 大型有孔虫 / 後氷期 / 最終氷期 / 海水準変動 / 最終氷期最盛期

Research Abstract

Paleo-sea-level changes and reef development processes before, during and after the Last Glacial Maximum (LGM) were reconstructed based on the taxonomic composition of fossil large benthic foraminiferal (LBF) assemblages from cores drilled on continental shelf slopes of the Great Barrier Reefby the IODP Expedition 325. Five LBF assemblages were delineated by multivariate analysis. Results ofstratigraphic changes of the five LBF assemblages and radiocarbon dates of fossil LBFs indicated that paleo-sea level was above -80 m before 30 kyr BP, then gradually lowered during the LGM, and the lowest at approximately -120 to -130 m in 19-20 k yr BP.

Research Products

• [Journal Article] Assessing subsidence rates and paleo water-depths for Tahiti reefs using U-Th chronology of altered corals (2012)
  • Author(s): Thomas, A.L., Fujita, K., Iryu, Y., Bard, E., Cabioch, G., Camoin, G., Cole, J.E., Deschamp, P., Durand, N., Hamelin, B., Heindel, K., Henderson, G.M., Mason, A.J., Matsuda, H., Menabreaz, L., Omori, A., Quinn, T., Sakai, S., Sato, T., Sugihara, K., Takahashi, Y., Thouveny, N., Tudhope, A.W., Webster, J., Westphal, H., Yokoyama, Y.
  • Journal Title: Marine Geology Volume: 295-298 Pages: 86-94
  • DOI: 10.1016/j.margeo.2011.12.006
  • Peer Reviewed
• [Journal Article] IODP Expedition 325 : Great Barrier Reefs reveals past sea-level, climate and environmental changes since the last ice age (2011)
  • Author(s): Yokoyama Y., Webster J.M., Cotterill C., the Expedition 325 Scientists (Fuiita K.)
  • Journal Title: Scientific Drilling Volume: 12 Pages: 32-45
• [Journal Article] Great Barrier Reef environmental changes: the last deglacial sea level rise in the South Pacific: offshore drilling northeast Australia (2010)
  • Author(s): Expedition 325 Scientists (Fujita K.)
  • Journal Title: IODP Prel. Rept Volume: 325
  • DOI: 10.2204/iodp.pr.325.2010
• [Journal Article] Sea-level rise during Termination II inferred from large benthic foraminifers: IODP Expedition 310, Tahiti Sea-Level (2010)
  • Author(s): Fujita K., Omori A., Yokoyama Y., Sakai S., Iryu Y
  • Journal Title: Marine Geology Volume: 271 Issue: 1-2 Pages: 149-155
  • DOI: 10.1016/j.margeo.2010.01.019
  • Peer Reviewed
• [Journal Article] Sea-level rise during Termination II inferred from large benthic foraminifers : IODP Expedition 310, Tahiti Sea-Level (2010)
  • Author(s): Fujita K., et al.
  • Journal Title: Marine Geology Volume: 271 Pages: 149-155
  • Peer Reviewed
• [Journal Article] Great Barrier Reef environmental changes : the last deglacial sea level rise in the South Pacific : offshore drilling northeast Australia (2010)
  • Author(s): OmExpedition 325 Scientists
  • Journal Title: IODP Preliminary Report Volume: 325
• [Journal Article] Sea-level history recorded in the Pleistocene carbonate sequence in IODP Hole 310-M0005D, off Tahiti (2010)
  • Author(s): Iryu Y., et al.
  • Journal Title: Island Arc Volume: 19 Pages: 690-706
  • Peer Reviewed
• [Presentation] 大型底生有孔虫化石群集に基づくグレートバリアリーフ陸棚斜面における最終氷期最盛期頃の古環境復元 (IODP第325次航海) (2013)
  • Author(s): 柳岡範子, 仲田潮子, 藤田和彦, 菅 浩伸, 横山祐典
  • Organizer: 2012年度古海洋シンポジウム
  • Place of Presentation: 東京大学大気海洋研究所
• [Presentation] 10DP第325次航海「グレートバリアリーフ環境変動」の概要と大型底生有孔虫群集を用いた海水準変動の復元 (2012)
  • Author(s): 藤田和彦・柳岡範子・仲田潮子・IODP Expedition 325 Scientists
  • Organizer: MRC 2012(微古生物学リファレンスセンター研究集会)
  • Place of Presentation: 東北大学
  • Year and Date: 2012-03-03
• [Presentation] グレートバリアリーフ陸棚斜面掘削コア中の大型底生有孔虫化石群集による最終氷期極大期以前の海水準変動復元 (2012)
  • Author(s): 仲田潮子・藤田和彦・IODP Expedition 325 Scientists
  • Organizer: MRC 2012(微古生物学リファレンスセンター研究集会)
  • Place of Presentation: 東北大学
  • Year and Date: 2012-03-02
• [Presentation] 次航海グレートバリアリーフ陸棚斜面掘削コアに産出する大型底生有孔虫化石群集解析 (2012)
  • Author(s): 柳岡範子・仲田潮子・藤田和彦・菅 浩伸・横山祐典・IODP Exp. 325 Scientists
  • Organizer: 日本地球惑星科学連合大会2012年大会
  • Place of Presentation: 千葉
• [Presentation] 第325次航海「グレートバリアリーフ環境変動」の概要と大型底生有孔虫化石群集を用いた海水準変動の復元 (2012)
  • Author(s): 藤田和彦・柳岡範子・仲田潮子・IODP Expedition 325 Scientists
  • Organizer: MRC2012 (微古生物学レファレンスセンター研究集会)
  • Place of Presentation: 東北大学, 仙台
• [Presentation] IODP第325 次航海グレートバリアリーフ陸棚斜面掘削コアに産出する大型底生有孔 虫化石群集解析 (2012)
  • Author(s): 柳岡範子, 仲田潮子, 藤田和彦, 菅浩伸, 横山祐典, IODP Exp. 325 Scientists
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ
• [Presentation] Sea-level rise during Termination II inferred from large benthic foraminifers : IODP Expedition 310, Tahiti Sea-Level (2010)
  • Author(s): Fujita, K., et al.
  • Organizer: FORAMS 2010 (International Symposium on Foraminifera)
  • Place of Presentation: ドイツ・ボン大学
  • Year and Date: 2010-09-05
• [Book] 星砂から地球環境問題を考える. 琉球大学編, 知の源泉~やわらかい南の学と思想5 (2013)
  • Author(s): 藤田和彦
  • Publisher: 沖縄タイムス社
• [Book] 星砂から地球環境問題を考える（琉球大学編 知の源泉 やわらかい南の学と思想５） (2013)
  • Author(s): 藤田和彦
  • Publisher: 沖縄タイムス社
• [Book] the Expedition 325 Scientists (Fujita K.) (2011) Proceedings of the Integrated Ocean Drilling Program (IODP) (2011)
  • Author(s): Webster J.M., Yokoyama Y., Cotterill C
• [Book] Proceedings of the Integrated Ocean Drilling Program (IODP) (2011)
  • Author(s): Webster J.M., Yokoyama Y., Cotterill C., the Expedition 325 Scientists (Fuiita K.).
  • Publisher: Integrated Ocean Drilling Program Management International, Inc., Tokyo(CD-ROM)
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