| 研究課題/領域番号 |
17K05712
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| 研究機関 | 明治大学 |
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研究代表者 |
Snyder Glen 明治大学, 研究・知財戦略機構, 特任教授 (90751777)
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| 研究分担者 |
鈴木 庸平 東京大学, 大学院理学系研究科(理学部), 准教授 (00359168)
松本 良 明治大学, 研究・知財戦略機構, 特任教授 (40011762)
佐野 有司 東京大学, 大気海洋研究所, 教授 (50162524)
戸丸 仁 千葉大学, 大学院理学研究院, 准教授 (80588244)
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| 研究期間 (年度) |
2017-04-01 – 2020-03-31
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| キーワード | microdolomite / biomarker / phylogenetic / gas hydrate / stable isotope / Japan Sea |
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| 研究実績の概要 |
Research activities for FY2018 included: (1)Anyalysis of gas hydrate oil concentrations (at Stephen Bowden Lab, University of Aberdeen, Scotland). Organic and biomarker chemistry was determined. (2)DNA extractions Phylogenetic m-RNA analysis of microbial life inside of microdolomite with Yohey Suzuki Lab (University of Tokyo). Sectioned grains were also stained and imaged for microbial DNA.(3)Sampling identification of microdolomites in deep porosity-filling gas hydrates from the Gulf of Mexico, U.S.A with Steve Phillips of University of Texas, Austin Campus gas hydrate lab and as part of the Joint Industrial Project (JIP)(4)EPMA quantitative mapping of microdolomite grains at AORI, University of Tokyo Kashiwa Campus lab with Kentaro Tanaka.(5)nano-SIMS trial mapping of microdolomite grains for organic composition at AORI, University of Tokyo Kashiwa campus with Naoto Takahata.(6)Determination of clumped-isotope composition of microdolomite grains at Tokyo Tech. with Naizhong Zhang. (7) Determination of stable isotopic composition of hydrate gases in Yuji Sano's Lab at AORI, with Naoto Takahata..
Outreach activities included: (1) Gave Several Conference talks and poster presentations (2)Internet Press Release: https://www.livescience.com/64532-microbes-inside-gas-hydrate-crystals.html
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The first of four manuscripts on this topic is nearly ready for submission. Microbial analysis at Suzuki Lab is still ongoing, since we want to confirm our genomic results with more sample analysis. Nano-sims analysis at AORI lab had some problems with sample preparation and we are currently working on resampling and new preparation techniques. Bowden lab in Scotland is currently looking at dissolved organic composition of the hydrate waters, since not all hydrate samples had oil in them.
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| 今後の研究の推進方策 |
Interpretation and publication of results is the major emphasis of our work in this final year of the grant. We still wish to detainee the organic matter composition inside of the dolomite grains, which will depend on further nanoSIMS analysis at AORI. Initial results of microbial analyses were quite interesting (Bacteriodetes species and no sulfate reducing bacteria or methane reducing archea)...so we want to analyze more samples to confirm the initial results. Finally, we hope to confirm the presence of microdolomites in other marine environments which host gas hydrate. These will include, hopefully, gas hydrates from Tatar Strait which we hope to sample this year, as well as analyses of samples already collected from Gulf of Mexico
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| 備考 |
Web Article is a result of a press conference carried out at the American Geophysical Union Annual Fall Meeting in Washington, D.C., December 2018.
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