Quadruple sulfur isotopic study of anaerobic sulfur metabolisms and their evolution
| Project/Area Number |
19740310
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
UENO Yuichiro Tokyo Institute of Technology, グローバルエッジ研究院, テニュアトラック助教 (90422542)
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| Project Period (FY) |
2007 – 2008
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| Project Status |
Completed (Fiscal Year 2008)
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| Budget Amount *help |
¥3,690,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2007: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | 地球史 / 硫黄同位体 / 酸素濃度 / 古大気 / 海底熱水 / 微生物代謝 |
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| Research Abstract |
四種硫黄同位体分析法の高精度分析を確立し,岩石試料・湖水試料・微生物培養実験試料のそれぞれに適用した結果次のような事が明らかになった。35億年前の硫酸塩鉱物に含まれる硫化物の四種同位体組成から当時、硫酸還元菌が活動した証拠を得た。一方、光合成硫黄細菌活動の類似環境として現在の成層湖において昨年から湖水の硫酸・硫化水素の観測および採取試料の培養実験を行って来たが、その結果、硫黄細菌の光合成活動が活発な夏の成層期には湖水中で硫酸還元と硫黄の酸化が生じていることが明らかになった。さらに、その期間は特異な四種同位体分別が見られる事から、存在度の低い^<36>Sの分析を高精度に行う事によって過去の嫌気光合成生物による硫黄酸化活動を検知できる可能性を示唆する結果となった。
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Report
(3 results)
Research Products
(81 results)
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[Journal Article] Variability in the microbial communities and hydrothermal fluid chemistry at the newly-discovered Mariner hydrothermal field, southern Lau Basin.2008
Author(s)
T. Takai, T. Nunoura, J. Ishibashi, J. Lupton, R. Suzuki, H. Hamasaki, Y. Ueno, S. Kawagucci, T. Gamo, Y. Suzuki, H. Hirayama, and K. Horikoshi
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Journal Title
Journal of Geophysical Research 113 G02031
Related Report
Peer Reviewed
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[Journal Article] Variability in the microbial communities and hydrothermal fluid chemistry at the newly-discovered Marinerhydrothermal field, southern Lau Basin2008
Author(s)
T.Takai, T.Nunoura, J.Ishibashi, J.Lupton, R. Suzuki, H.Hamasaki, Y. eno, S. Kawagucci, T.Gamo, Y.Suzuki, H. Hirayama, K. Horikoshi
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Journal Title
Journal of Geophysical Research 113,
Related Report
Peer Reviewed
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[Journal Article] Variability in the microbial communities and hydrothermal fluid chemistry at the newly-discovered Mariner hydrothermal field, southern Lau Basin
Author(s)
K. Takai, T. Nunoura, J. Ishibashi, J. Lu pton, R. Suzuki, H. Hamasaki, Y. Ueno S. Kawagucci, T. Gamo, Y. Suzuki, H. Hi rayama, and K. Horikoshi
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Journal Title
Journal of Geophysical Research
Related Report
Peer Reviewed
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[Presentation] Role of drastic and repetitive changes of surface environment on dramatic, biological evolution during and after the Neoproterozoic Snowball Earth2008
Author(s)
T. Komiya, S. Yusuke, T. Ishikawa, M. Tahata, Y. Ueno, T. Ohno, T. Hirata, N. Yoshida, S. Maruyama
Organizer
From Genome to Snowball Earth, Metazoan Evolution and Habitable Planets : Multidisciplinary Relation
Place of Presentation
Nihon Kagaku Miraikan
Year and Date
2008-09-30
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