Global correlation of the Upper Cretaceous system in the Northwest Pacific based on high-resolution magnetostratigraphy of the Nemuro Group

2008 Fiscal Year Final Research Report

• Project/Area Number: 19540496
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Kochi University
• Principal Investigator: KODAMA Kazuto Kochi University, 教育研究部・自然科学系, 教授 (00153560)
• Co-Investigator(Renkei-kenkyūsha): SHIGETA Yasunari 国立科学博物館, 地学研究部, 主任研究員 (30270408)
• Project Period (FY): 2007 – 2008
• Keywords: 古地磁気層序 / 上部白亜系 / 国際対比 / 根室層群

Research Abstract

地球の過去で最も温暖な時期であった白亜紀の地層から、精密な地磁気の変化史を読み取ることによって、過去の太平洋域に生息した生物の進化とその地球環境との関連を明らかにした. 研究対象は、北海道根室地域に分布する白亜紀後期(約7千万年前)の根室層群と呼ばれる堆積岩である. アンモナイトなどの大型化石を例に、それらの形態や生息域の変遷を、地球磁場極性の変化を某準とする年代軸を某準として復元することに成功した.

Research Products

• [Journal Article] Faunal turnover at the end of the Cretaceous in the North Pacific region : Implications from combined magnetostratigraphy and biostratigraphy of the Maastrichtian Senpohshi Formation in the eastern Hokkaido Island, northern Japan (2008)
  • Author(s): Nifuku, K., K. Kodama, Y. Shigeta, and H. Naruse
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology 271 Pages: 84-95
  • Peer Reviewed
• [Journal Article] First discovery of Pravitoceras sigmoidake Yabe from the Yezo Supergroup in Hokkaido, Japan (2008)
  • Author(s): Matsunaga, T., H. Maeda, Y. Shigeta, K. Hasegawa, S.Nomura, and T. Nishimura
  • Journal Title: Paleontological Research (in press)
  • Peer Reviewed
• [Journal Article] Paleomagnetic results from Arrow Rocks in the framework of paleomagnetism in pre-Neogene rocks from New Zealand (2007)
  • Author(s): Kodama, K., M. Fukui , Y. Aita, T. Sakai, R.S. Hori , A. Takemura, H.J. Campbell, C.J. and B.K. SpOrli
  • Journal Title: GNS Science Monograph 24 Pages: 177-196
  • Peer Reviewed
• [Journal Article] Paleomagnetic results from Arrow Rocks in the framework of paleomagnetism in pre-Neogene rocks from New Zealand (2007)
  • Author(s): Suzuki, N., Y. Ai ta, H.J. Campbell, R. S. Hori, Y. Kamata, K. Kodama, Y. Nakamura, Y. Nasu, T. Sakai, M. Sakakibara, K.B. Sporli, A. Takemura, S. akemura, and S. Yamakita
  • Journal Title: GNS Science Monograph 24 Pages: 17-44
  • Peer Reviewed
• [Journal Article] Isotopic composition of Late Mesozoic organogenic carbonates of Far East (2007)
  • Author(s): Zakharov, Y.D. ,O.P. Smyshl yaeva, A.M. Popov, and Y. Shigeta
  • Journal Title: Dalnauka, Vladivostok 199 Pages: 199
• [Journal Article] Campanian climatic change : isotopic evidence from Far Fast, North America, North Atlantic and Western Europe (2007)
  • Author(s): Zakharov, Y.D., Y. Shi geta, K. Tanabe, Y. Tba, O.P. Smyshyaeva, F. A. Sokolova, A.M. Popov, T.A. Velivetskaya & T.R. Afanasyeva
  • Journal Title: Acta Geologica Sinica 8 Pages: 1046-1069
  • Peer Reviewed
• [Journal Article] Piggyback whorls : a new theoretical morphologic model reveals constructional linkages among morphological characters in ammonoids (2007)
  • Author(s): Ubukata, T., K. Tanabe, Y. Shigeta, H. Maeda, and R. Mapes
  • Journal Title: Acta Paleontologica Polonica 53 Pages: 113-128
  • Peer Reviewed
• [Presentation] A new AC susceptibility instrument for detecting frequency dependence over a wide range of frequencies (2008)
  • Author(s): Kodama, K.
  • Organizer: 2008 American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2008-12-17
• [Presentation] Remanence acquisition in marine carbonates : a lesson from the K-T boundary interval (2008)
  • Author(s): Abrajevitch, A.
  • Organizer: 2008 American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2008-12-17
• [Presentation] An AC susceptibility measurement system for detecting the frequency dependence over a wide range of frequencies (2008)
  • Author(s): Kodama, K
  • Organizer: 日本地球惑星科学連合2008年大会
  • Place of Presentation: 幕張メッセ、千葉
  • Year and Date: 2008-05-28
• [Presentation] 東赤道太平洋における過去300万年間の相対古地磁気強度変動 (2008)
  • Author(s): 大城広樹
  • Organizer: 日本地球惑星科学連合2008年大会
  • Place of Presentation: 幕張メッセ、千葉
  • Year and Date: 2008-05-28
• [Presentation] 北太平洋地域における上部白亜系マストリヒチアン階の生層序および生物相の変遷 : 根室層群仙鳳趾層の古地磁気層序・生層序からの示唆 (2007)
  • Author(s): 荷福洸
  • Organizer: 日本古生物学会
  • Place of Presentation: 大阪市立大学、大阪
  • Year and Date: 2007-06-29
• [Presentation] A new system for measurements of AC magnetic susceptibility and Curie temperature with application to natural magnetic minerals (2007)
  • Author(s): Fujiwara, A.
  • Organizer: 日本地球惑星科学連合2007年大会
  • Place of Presentation: 幕張メッセ、千葉
  • Year and Date: 2007-05-22