| Project/Area Number |
19340150
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Nagoya University |
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Principal Investigator |
SUGITANI Kenichiro Nagoya University, 大学院・環境学研究科, 教授 (20222052)
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| Co-Investigator(Kenkyū-buntansha) |
MIMURA Koichi 名古屋大学, 大学院・環境学研究科, 准教授 (80262848)
YAMAMOTO Koshi 名古屋大学, 環境学研究科, 准教授 (70183689)
MINAMI Masayo 名古屋大学, 年代測定資料研究センター, 准教授 (90324392)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2007: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Keywords | 太古代 / 初期生命 / 進化 / ピルバラクラトン / シアノバクテリア / 真核生物 / 微化石様構造 / チャート / リアフサイクル / 3次元像 / 光合成細菌 / ファレル珪岩層 / スティルリープールチャート層 / 微化石 / 画像処理 / 細胞分裂 / ピルバラクラト / バルバートン / ストロマトライト |
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| Research Abstract |
Morphologically diverse microfossils from the ca. 3.0 Ga Farrel Quartzite in the Pilbara Craton, Western Australia were studied comprehensively, including accumulation of photo data of microfossils, palynological extraction of microfossils, reconstruction of 3-D images, reconstruction of life cycle and taxonomic analyses, analyses of rare-earth elements in host cherts, and Nano-SIMS elemental mapping. The results of these studies are consistent with the biogenicity of the Farrel Quartzite microstructures, and suggest that the surface ecosystem in the Archean was much more diverse than currently postulated and the possibility that the assemblage includes oxygen-producing photosynthetic bacteria and even eukaryotes.
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