Radiolarian extinction event in the Middle Paleozoic

• Project/Area Number: 23740376
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geology
• Research Institution: Niigata University
• Principal Investigator: KURIHARA Toshiyuki 新潟大学, 自然科学系, 准教授 (10447617)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2011: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 放散虫 / プランクトン / 中期古生代 / デボン紀 / 大量絶滅 / 堆積岩化学組成 / 黒瀬川帯 / モンゴル

Research Abstract

Radiolarian faunal transition and geochemistry of Upper Silurian to Middle Devonian siliceous rocks in Japan and Mongolia were investigated to understand a possible mass extinction event in Early Devonian time. The result of the present study indicates the following faunal transition process: (1) the decline and subsequent extinction of Inaniguttidae occurred in the middle Early Devonian, (2) Palaeoscenidiidae that is a typical opportunistic group occupied a late Early Devonian radiolarian fauna, and (3) subsequent diversification of Entactiniidae became pronounced in the Middle Devonian. Based on the results of geochemical analysis of chert, there is a possibility that this extinction event has a causal relationship with Early Devonian environmental change attributed to a large igneous activity.

Research Products

• [Journal Article] Geological setting of the basaltic rocks in an accretionary complex, Khangai-Khentei belt, Mongolia (2013)
  • Author(s): Tsukada, K., Nakane, Y., Yamamoto, K., Kurihara, T., Otoh, S., Kashiwagi, K., Minjin, C., Sersmaa G., Manchuk, N. Niwa, M., Tokiwa
  • Journal Title: Island Arc Volume: 22 Issue: 2 Pages: 227-241
  • DOI: 10.1111/iar.12028
  • Peer Reviewed
• [Presentation] 黒瀬川帯横倉山地域中畑層におけるInaniguttidae科放散虫化石 (2012)
  • Author(s): 栗原敏之・遠藤龍馬
  • Organizer: 日本地質学会第119年学術大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2012-09-10
• [Presentation] Late Silurian to Devonian pelagic facies in the Khangai -Khentei belt, central Mongolia (Central Asian Orogenic Belt) and its radiolarian age. Berchte des Institutes fur Erdwissenschaften (2011)
  • Author(s): Kurihara, T., Tsukada, K., Otoh, S., Manchuk, N., Matsumoto, A., Sersmaa, G., Minjin, Ch.
  • Organizer: Karl-Franzens-Universitat Graz, Opening Meeting of IGCP
  • Place of Presentation: グラーツ,オーストリア
  • Year and Date: 2011-09-20
• [Presentation] Latest Silurian and Early Devonian radiolarian assemblages from tuffaceous rocks in the Tomochi area of the Kurosegawa Terrane, central Kyushu, Southwest Japan. Berchte des Institutes fur Erdwissenschaften (2011)
  • Author(s): Kurihara, T.
  • Organizer: Karl-Franzens-Universitat Graz
  • Place of Presentation: グラーツ,オーストリア
  • Year and Date: 2011-09-20
• [Presentation] Latest Silurian and Early Devonian radiolarian assemblages from tuffaceous rocks in the Tomochi area of the Kurosegawa Terrane, central Kyushu, Southwest Japan (2011)
  • Author(s): Kurihara, T.
  • Organizer: Opening Meeting of IGCP 596 (Climate change and biodiversity patterns in the Mid-Paleozoic)
  • Place of Presentation: オーストリア，グラーツ
• [Presentation] Late Silurian to Devonian pelagic facies in the Khangai-Khentei belt, central Mongolia (Central Asian Orogenic Belt) and its radiolarian age. (2011)
  • Author(s): Kurihara, T., Tsukada, K., Otoh, S., Manchuk, N., Matsumoto, A., Sersmaa, G., Minjin, Ch.
  • Organizer: Opening Meeting of IGCP 596 (Climate change and biodiversity patterns in the Mid-Paleozoic)
  • Place of Presentation: オーストリア，グラーツ