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The whole history of sedimentary process of the Early Triassic bedded cherts

Research Project

Project/Area Number 16K05572
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geology
Research InstitutionUtsunomiya University

Principal Investigator

Aita Yoshiaki  宇都宮大学, 農学部, 教授 (90167768)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsニュージーランド / アローロックス島 / オルアテマヌ層 / 前期三畳紀 / 層状チャート / 堆積相解析 / 生物源堆積相 / 遠洋性粘土相 / 三畳紀前期~中期 / モツタプ島 / Arrow Rocks島 / オルアテマヌ層Unit 2b / Motutapu島 / オルアテマヌ層Unit 3-4 / 三畳紀前期 / 珪質泥岩 / チャートギャップ / 生物源シリカ / 堆積過程 / マイクロ堆積相
Outline of Final Research Achievements

The Early Triassic bedded chert sequences from Unit 2b to Unit 4 of the Oruatemanu Formation on Arrow Rocks, New Zealand are unique because the Early Triassic bedded chert was very rare elsewhere during the Chert Gap period. The SEM observations on the acid-etched chert slabs to unravel the sedimentary facies and microstructure of a single bedded chert resulted four microfacies recognized. Facies G1-3: pelagic facies with densely packed radiolarian shells (>70%), Facies G2: a chert matrix with a high biosiliceous component (30-70%), Facies G3: a chert facies with a few biosiliceous component (10-30%), and Facies E: a pelagic clay matrix with a low content (1-10%) of biosiliceous shells and spicules. Biogenic facies with abundant radiolarian shells (G1+G2+G3) indicates enhanced flux change up to 30-70% within the Units 2b-3 during the Griesbachian and mid Dienerian, while biogenic facies (G2+G3) ratio gradually decreased to 4.7-7.7% and pelagic clay facies dominated in the Unit 4.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果に基づいて,P-T境界で海洋生物の96%が絶滅した後,前期三畳紀の海洋生態系が回復途上にある時期において,動物プランクトンである放散虫がどのようにP-T境界を生き残り,前期三畳紀の海洋において放散虫が繁栄することのできた唯一のレフュージ海域が南半球のニュージーランド海域に存在したことを明らかにしたことは学術的意義が大きい。前期三畳紀の層状チャート(Griesbachian - Dienerian)において放散虫殻を多産する生物源シリカ相が卓越するが,Dienerian中期からSpathianにかけて生物源シリカ相が次第に減少することから海洋環境の悪化が推察される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (34 results)

All 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results) Presentation (21 results) (of which Int'l Joint Research: 10 results) Book (2 results) Remarks (6 results)

  • [Int'l Joint Research] GNS Science/Univesity of Auckland(ニュージーランド)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] GNS Science(ニュージーランド)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Geology of the Nishinoomote Formation, Kumage Group, in the northern part of Tanegashima Island, Kagoshima Prefecture, SW Japan2018

    • Author(s)
      菊川照英,相田吉昭,亀尾浩司,小竹信宏
    • Journal Title

      The Journal of the Geological Society of Japan

      Volume: 124 Issue: 5 Pages: 313-329

    • DOI

      10.5575/geosoc.2017.0082

    • NAID

      130007413072

    • ISSN
      0016-7630, 1349-9963
    • Year and Date
      2018-05-15
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High sediment input and possible oceanic anoxia in the pelagic Panthalassa during the latest Olenekian and early Anisian: Insights from a new deep-sea section in Ogama, Tochigi, Japan2018

    • Author(s)
      Muto, S., Takahashi, S., Yamakita, S., Suzuki, N., Suzuki, N. and Aita, Y.
    • Journal Title

      Palaeogeography, Palaeoclimatology, Palaeoecology

      Volume: 490 Pages: 687-707

    • DOI

      10.1016/j.palaeo.2017.11.060

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Progress on Triassic radiolarian taxonomy: in honour of Heinz Kozur and Helfried Mostler2017

    • Author(s)
      Dumitrica, P. and Aita, Y.
    • Journal Title

      Revue de micropaleontologie

      Volume: 60(1) Issue: 1 Pages: 3-6

    • DOI

      10.1016/j.revmic.2017.03.003

    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] ニュージーランド北島Kapiti島から産出する後期三畳紀放散虫―高緯度型固有種は存在するのか?2018

    • Author(s)
      相田吉昭・山北 聡・武藤 俊・Hamish Campbell
    • Organizer
      日本古生物学会2018年年会 東北大学
    • Related Report
      2018 Annual Research Report
  • [Presentation] X線 micro-CTによるGlomeropyle属放散虫の形態と内部構造- Glomeropyle bispinosaと Glomeropyle sp. の比較研究2018

    • Author(s)
      児矢野愛海・金子優樹・佐藤遼祐・篠崎愛恵・岸本直子・相田吉昭
    • Organizer
      日本古生物学会2018年年会 東北大学
    • Related Report
      2018 Annual Research Report
  • [Presentation] X線 micro-CTによるGlomeropyle属放散虫の内部構造- Glomeropyle grantmackieiと Glomeropyle mahinepuaensisの比較研究2018

    • Author(s)
      鈴木桜子・相田吉昭・岸本直子
    • Organizer
      日本古生物学会2018年年会 東北大学
    • Related Report
      2018 Annual Research Report
  • [Presentation] 内部骨針を持つ放散虫 G. grantmackieiのAr+イオンビーム加工を用いた走査電子顕微鏡(SEM)による微細立体構造の解析2018

    • Author(s)
      植竹勇介・山本康晶・朝比奈俊輔・相田吉昭
    • Organizer
      日本古生物学会2018年年会 東北大学
    • Related Report
      2018 Annual Research Report
  • [Presentation] Analysis of Internal structure for Radiolarian microfossil by SEM via Ar+ beam cutting method2018

    • Author(s)
      Y. Uetake, Y. Yasuaki, S. Asahina, S. Suzuki and Y. Aita
    • Organizer
      19th International Microscopy Congress (IMC), Sydney
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Triassic-Jurassic boundary studies on Murihiku and Waipapa Terranes, NZ2018

    • Author(s)
      R. S. Hori, M. Sakakibara, K. Akikuni, Y. Okada, J. A. Grant-Mackie, K. B. Sporli, Yoshiaki Aita, T. Sakai, A. Takemura, Satoshi Yamakita, M. Ikehara, K. Kodama & Hamish J. Campbell
    • Organizer
      Geoscience 2018 Conference, Napier Conference Centre, New Zealand
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ゴンドワナ由来の三畳紀~ジュラ紀放散虫フォーナ2018

    • Author(s)
      相田吉昭,堀 利栄
    • Organizer
      日本古生物学会第167回例会シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] 両極分布を示す前期コノドントWapitiodus2018

    • Author(s)
      山北聡,竹村厚司,相田吉昭,堀利栄,高橋 聡,Hamish Campbell,Bernhard Sporli
    • Organizer
      日本古生物学会第167回例会
    • Related Report
      2017 Research-status Report
  • [Presentation] 前期三畳紀のチャートギャップ期に形成されたチャート層の 珪質生物源堆積相について2017

    • Author(s)
      相田吉昭・草場研太・丸山 巧・山北 聡 ・ 竹村厚司・堀 利栄・Hamish Campbell・K. Bernhard Sporli
    • Organizer
      日本古生物学会第166回例会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2017-01-28
    • Related Report
      2016 Research-status Report
  • [Presentation] X線 micro-CTによるGlomeropyle属放散虫の形態と内部構造-その1 Glomeropyle sp. の解析2017

    • Author(s)
      新村憲人・益子佳公・石嵜美乃・岸本直子・相田吉昭(宇都宮大・農・地質)
    • Organizer
      日本古生物学会第166回例会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2017-01-28
    • Related Report
      2016 Research-status Report
  • [Presentation] X線 micro-CTによるGlomeropyle属放散虫の形態と内部構造-その2 Glomeropyle waipapaensis の解析2017

    • Author(s)
      益子佳公・新村憲人・石嵜美乃・岸本直子・相田吉昭
    • Organizer
      日本古生物学会第166回例会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2017-01-28
    • Related Report
      2016 Research-status Report
  • [Presentation] Enhanced biogenic silica sedimentation processes revealed in the Early Triassic, Induan bedded chert from Arrow Rocks , Panthalassa ocean2017

    • Author(s)
      Yoshiaki Aita, Natsuko Kikuchi, Satoshi Yamakita, Atsushi Takemura, Megumi Saito, Yoshimi Kubota, K. Bernhard Sporli and Hamish J. Campbell
    • Organizer
      IGCP 630 annual meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Smithian/Spathian boundary detected slightly below OAE-related black sediments in oceanic sequences in Japan and New Zealand2017

    • Author(s)
      Satoshi Yamakita, Satoshi Takahashi, Kunio Kaiho, Megumu Fujibayashi,Satoru Kojima, Atsushi Takemura, Yoshiaki Aita, Rie S. Hori, K. Bernhard Sporli and Hamish J. Campbell
    • Organizer
      IGCP 630 annual meeting in Sendai, 東北大学(仙台市)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Conodont provincialism in the Early Triassic environmental extreme2017

    • Author(s)
      Satoshi Yamakita, Atsushi Takemura, Yoshiaki Aita, Rie S. Hori, Satoshi Takahashi, Jack A. Grant-Mackie, K. Bernhard Sporli and Hamish J. Campbell
    • Organizer
      IGCP 630 annual meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] パンサラサ海に堆積したアローロックス島の前期三畳紀層状チャートにおける生物源シリカ相とそのフラックス変動2017

    • Author(s)
      相田吉昭,菊池那津子,草場研太,丸山 巧,山北 聡,竹村厚司,堀 利栄,高橋 聡,斎藤めぐみ・久保田好美,K. Bernhard Sporli,Hamish J. Campbell
    • Organizer
      日本地質学会第124年学術大会
    • Related Report
      2017 Research-status Report
  • [Presentation] ニュージーランド北島,モツタプ島に分布する中部三畳系層状チャートの生物源シリカ相の変遷2017

    • Author(s)
      鬼丸舜平,相田吉昭,中澤克昴,山北 聡,竹村厚司,堀 利栄,高橋 聡,K. Bernhard Sporli,Hamish J. Campbell
    • Organizer
      日本地質学会第124年学術大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Biosiliceous facies and flux change of the Early Triassic bedded chert from Arrow Rocks, New Zealand, Panthalassa ocean2017

    • Author(s)
      Yoshiaki AITA, Natsuko KIKUCHI, Kenta KUSABA, Takumi MARUYAMA, Satoshi YAMAKITA, Atsushi TAKEMURA, Rie S. HORI, Satoshi TAKAHASHI, Megumi SAITO, Yoshimi KUBOTA, K. Bernhard SPORLI and Hamish J. CAMPBELL
    • Organizer
      第15回国際放散虫研究集会
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Diversity and newly revealed internal morphology of Middle Triassic Radiolaria Glomeropyle species2017

    • Author(s)
      Yoshiaki AITA, Rei KUKI, Sakurako SUZUKI, Kento NIIMURA, Kako MASHIKO, Yoshino ISHIZAKI and Naoko KISHIMOTO
    • Organizer
      第15回国際放散虫研究集会
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Detailed internal structures of Middle Triassic Glomeropyle galagala? and unnamed Glomeropyle sp. with the use of X-ray micro-CT2017

    • Author(s)
      Kento NIIMURA, Yoshiaki AITA, Sakurako SUZUKI, Kako MASHIKO, Yoshino ISHIZAKI and Naoko KISHIMOTO
    • Organizer
      第15回国際放散虫研究集会
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Early Triassic conodont provincialism and its implication for the paleoceanography of Tethys and Panthalassa2017

    • Author(s)
      Satoshi Yamakita, Atsushi Takemura, Yoshiaki Aita, Rie S. Hori, Satoshi Takahashi, Jack A. Grant-Mackie, K. Bernhard Sporli and Hamish J. Campbell
    • Organizer
      第15回国際放散虫研究集会
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Analysis of internal structure of Eocene Lithochytris vespertilio by Cross section Polisher method using a broad Ar+ ion beam2017

    • Author(s)
      Y. Uetake, Y. Yamamoto, Y. Yamaguchi, S. Asahina and Y. Aita
    • Organizer
      第15回国際放散虫研究集会
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Book] ミクロな化石から探る地球環境の変遷―放散虫の内部構造からチャートの堆積過程まで(2018 SEMユーザーズミーティングセミナー予稿集)2018

    • Author(s)
      相田吉昭
    • Publisher
      SEMユーザーミーティング事務局
    • Related Report
      2018 Annual Research Report
  • [Book] 大谷石の作る景観と地質-大谷層の成り立ちを探訪する2017

    • Author(s)
      相田吉昭・酒井豊三郎
    • Publisher
      宇都宮美術館
    • Related Report
      2016 Research-status Report
  • [Remarks] ニュージーランドの地質について

    • URL

      http://agri.mine.utsunomiya-u.ac.jp/hpj/deptj/plaj/Labo/Geology/column2.html

    • Related Report
      2018 Annual Research Report 2017 Research-status Report 2016 Research-status Report
  • [Remarks] NZ調査隊の記録1

    • URL

      http://agri.mine.utsunomiya-u.ac.jp/hpj/deptj/plaj/Labo/Geology/nzresearch.html

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
  • [Remarks] NZ調査隊の記録2

    • URL

      http://agri.mine.utsunomiya-u.ac.jp/hpj/deptj/plaj/Labo/Geology/nzresearch2.html

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
  • [Remarks] 宇都宮大学 研究者総覧

    • URL

      https://www.utsunomiya-u.ac.jp/activity/research/scholarlist/agriculture/dep1/aita_yoshiaki.php

    • Related Report
      2018 Annual Research Report
  • [Remarks] 宇都宮大学地質学研究室

    • URL

      http://agri.mine.utsunomiya-u.ac.jp/hpj/deptj/plaj/Labo/Geology/geology.html

    • Related Report
      2017 Research-status Report 2016 Research-status Report
  • [Remarks] NZ調査隊の記録

    • URL

      http://agri.mine.utsunomiya-u.ac.jp/hpj/deptj/plaj/Labo/Geology/nzresearch.html

    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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