Did radiolarians become extinct at the Paleozoic/Mesozoic boundary? - The paleontological study of the Earliest Triassic radiolarians

• Project/Area Number: 16340160
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Hyogo University of Teacher Education
• Principal Investigator: TAKEMURA Atsushi Hyogo University of Teacher Education, Graduate School of Education, Associate Professor, 学校教育研究科, 助教授 (90192632)
• Project Period (FY): 2004 – 2006
• Project Status: Completed (Fiscal Year 2006)
• Budget Amount: ¥13,700,000 (Direct Cost: ¥13,700,000); Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000); Fiscal Year 2005: ¥1,500,000 (Direct Cost: ¥1,500,000); Fiscal Year 2004: ¥11,000,000 (Direct Cost: ¥11,000,000)
• Keywords: Radiolaria / Paleozoic / Mesozoic / P / T boundary / New Zealand / Arrow Rocks / Mass extinction / bedded chert

Research Abstract

The largest mass extinction event in earth history occurred at the Permian/Triassic boundary. Radiolarians, representative of Paleozoic to Mesozoic oceanic plankton with siliceous skeletons, drastically changed from Permian to Triassic time. The details of this change, however, remain unclear, because of the global lack of radiolarian-bearing pelagic sediments of Earliest Triassic age. The research group including the head investigator discovered an exceptional pelagic Permian-Triassic boundary sequence exposed at Arrow Rocks (Oruatemanu Island), a small islet at Northland, North Island of New Zealand. In this research project, the paleontological study of Earliest Triassic (mainly Early Induan) radiolarians was made to clarify the detailed faunal change of radiolarians across the P/T boundary.
Relatively well-preserved radiolarians occurred in about 10 horizons within Griesbachian (early Induan) and early Dienerian (late Induan) chert sequence from Arrow Rocks. More than 40 species were discriminated among these radiolarians and about 20 species were reported and/or described (Takemura and Aono, 2007 ; Takemura et al., 2007). The head investigator had described the other species and prepares to submit the taxonomic paper.
The Earliest Triassic radiolarian faunas include Entactinarians, Latentifistularians and Albaillellarians, all of which are components of Permian radiolarian faunas. Many species are the quite same one as Permian, and therefore they survived across the P/T boundary. Primitive Nassellaria, which are representative of Mesozoic and Cenozoic faunas, occurs in late Induan (Kamata et al., 2007). The radiolarian fauna had changed gradually around P/T boundary and within Earliest Triassic. This faunal change may be influenced by the double oceanic anoxic events detected from the Oruatemanu Formation (Hori et al., 2007). The Arrow Rocks research monograph (Sporli et al. (eds.), 2007) was published as one of the result of this research project.

Research Products

• [Journal Article] Lithostratigraphy of the Oruatemanu Formation, Waipapa Terrane, Arrow Rocks, Northland, New Zealand (2007)
  • Author(s): Suzuki, N., Aita, Y., Campbell, H.J., Hori, R.S., Kamata, Y., Kodama, K., Nakamura, Y., Nasu, Y., Sakai.T., Sakakibara, M., Sporli, K.B., Takemura, A., Takemura, S., Yamakita, S.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] The Depositional Environment of the Induan (Early Triassic) Biosiliceous Sequence (Units 2B and 3 of the Oruatemanu Formation), Arrow Rocks, New Zealand (2007)
  • Author(s): Suzuki, N., Aita, Y., Yamakita, S., Kamata, Y., Takemura, A., Fujiki, T., Ogane, K., Sakai, T., Hori, R.S.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] A conodont biostratigraphic framework of a Permian/Triassic ocean-floor sequence in the accretionary Waipapa Terrane at Arrow Rocks, Northland, New Zealand (2007)
  • Author(s): Yamakita, S., Takemura, A., Kamata, Y., Aita, Y., Hori, R.S., Campbell, H.J.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Permian radiolarians from Arrow Rocks, Northland, New Zealand (2007)
  • Author(s): Takemura, A., Yoshimura, E., Sakamoto, S., Takemura, S., Yamakita, S.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Earliest Triassic Radiolarians from the ARH and ARF sections on Arrow Rocks, Waipapa Terrane, Northland, New Zealand (2007)
  • Author(s): Takemura, A., Sakai, M., Sakamoto, S., Aono, R., Takemura, S., Yamakita, S.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Late Induan (Dienerian) primitive nassellarians from Arrow Rocks, Northland, New Zealand (2007)
  • Author(s): Kamata, Y., Matsuo, A., Takemura, A., Yamakita, S., Aita, Y., Sakai, T., Suzuki, N., Hori, R.H.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Paleomagnetic results from arrow rocks in the framework of paleomagnetism in pre-Neogene rocks from New Zealand (2007)
  • Author(s): Kodama, K., Fukui, M., Aita, Y., Sakai, T., Hori, R.H., Takemura, A., Campbell, H.J., Hollis, C.J., Grant-Mackie, J.A., Sporli, K.B.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Systematic description of some radiolarians from Induan cherts in the ARH and ARF sections of the Oruatemanu Formation, Arrow Rocks (2007)
  • Author(s): Takemura, A., Aono, R.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Results of multidisciplinary studies of the Permian/Triassic ocean floor sequence (Waipapa Terrane) at Arrow Rocks, Northland, New Zealand (2007)
  • Author(s): Sporli, K.B., Aita, Y., Hori, R.H., Takemura, A.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Lithostratigraphy of the Oruatemanu Formation, Waipapa Terrane, Arrow Rocks, Northland, New Zealand. (2007)
  • Author(s): Suzuki, N., Aita, Y., Campbell, H.J., Hori, R.S., Kamata, Y., Kodama, K., Nakamura, Y., Nasu, Y., Sakai.T., Sakakibara, M., Sporli, K.B., Takemura, A., Takemura, S., Yamakita, S.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. GNS Science Monograph 24 (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] The Depositional Environment of the Induan (Early Triassic) Biosiliceous Sequence (Units 2B and 3 of the Oruatemanu Formation), Arrow Rocks, New Zealand. (2007)
  • Author(s): Suzuki, N., Aita, Y., Yamakita, S., Kamata, Y., Takemura, A., Fujiki, T., Ogane, K., Sakai, T., Hori, R.S.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. GNS Science Monograph 24 (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] A conodont biostratigraphic framework of a Permian/Triassic ocean-floor sequence in the accretionary Waipapa Terrane at Arrow Rocks, Northland, New Zealand. (2007)
  • Author(s): Yamakita, S., Takemura, A., Kamata, Y., Aita, Y., Hori, R.S., Campbell, H.J.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. GNS Science Monograph 24 (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Permian radiolarians from Arrow Rocks, Northland, New Zealand. (2007)
  • Author(s): Takemura, A., Yoshimura, E., Sakamoto, S., Takemura, S., Yamakita, S.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. GNS Science Monograph 24 (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Earliest Triassic Radiolarians from the ARH and ARF sections on Arrow Rocks, Waipapa Terrane, Northland, New Zealand. (2007)
  • Author(s): Takemura, A., Sakai, M., Sakamoto, S., Aono, R., Takemura, S., Yamakita, S.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. GNS Science Monograph 24 (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Late Induan (Dienerian) primitive nassellarians from Arrow Rocks, Northland, New Zealand. (2007)
  • Author(s): Kamata, Y., Matsuo, A., Takemura, A., Yamakita, S., Aita, Y., Sakai, T., Suzuki, N., Hori, R.H.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. GNS Science Monograph 24 (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Paleomagnetic results from arrow rocks in the framework of paleomagnetism in pre-Neogene rocks from New Zealand. (2007)
  • Author(s): Kodama, K., Fukui, M., Aita, Y., Sakai, T., Hori, R.H., Takemura, A., Campbell, H.J., Hollis, C.J., Grant-Mackie, J.A., Sporli, K.B.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. GNS Science Monograph 24 (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Systematic description of some radiolarians from Induan cherts in the ARH and ARF sections of the Oruatemanu Formation, Arrow Rocks. (2007)
  • Author(s): Takemura, A., Aono, R.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. GNS Science, Monograph 24 (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Results of multidisciplinary studies of the Permian/Triassic ocean floor sequence (Waipapa Terrane) at Arrow Rocks, Northland, New Zealand (2007)
  • Author(s): Sporli, K.B., Aita, Y, Hori, R.H., Takemura, A.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. GNS Science Monograph 24 (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu ), Northland, New Zealand. (2007)
  • Author(s): Sporli, K.B., Takemura, A., Hori, R.S.(eds.)
  • Journal Title: GNS Science Monograph 24, Institute of Geological ＆ Nuclear Sciences Limited, Lower Hutt, New Zealand (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] A conodont biostratigraphic framework of a Permian/Triassic ocean-floor sequence in the accretionary Waipapa Terrane at Arrow Rocks, Northland, New Zealand (2007)
  • Author(s): Yamakita, S., Takemura, A., Kamata, Y., Aita, Y., Hori, R.S., Campbell, H.J.
  • Journal Title: The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monogranh 24(印刷中)
• [Journal Article] Lithofacies if Middle to Upper Permian pelagic sediments in the Arrow Rocks, North Island, New Zealand. (2005)
  • Author(s): Takemura, S. et al.
  • Journal Title: NOM(News of Osaka Micropaleontologists)Spec. Vol. 13(印刷中)
• [Journal Article] Lithology of the ARG Section, North Island, New Zealand. (2004)
  • Author(s): Takemura, S. et al.
  • Journal Title: Hyogo University of Teacher Education Journal Vol.24, Ser.3 Pages: 25-31
  • NAID: 40006233551
• [Book] The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24 (2007)
  • Author(s): Sporli, K.B., Takemura, A., Hori, R.S.(eds.)
  • Publisher: Institute of Geological ＆ Nuclear Sciences Limited, Lower Hurt, New Zealand(印刷中)
  • Description: 「研究成果報告書概要(和文)」より
• [Book] The Oceanic Permian/Triassic boundary sequence at Arrow Rocks (Oruatemanu), Northland, New Zealand. GNS Science Monograph 24 (2007)
  • Author(s): Sporli, K.B., Takemura, A., Hori, R.S.(eds.)
  • Publisher: Institute of Geological ＆ Nuclear Sciences Limited, Lower Hutt, New Zealand