オホーツク海天然ガスハイドレートの同位体組成とその結晶特性 Isotopic Composition and Crystallographic Properties of Gas Hydrate in the Sea of Okhotsk

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著者

    • 布川 裕 NUNOKAWA Yutaka
    • 北見工業大学未利用エネルギー研究センター New Energy Resources Research Center, Kitami Institute of Technology
    • 庄子 仁 SHOJI Hitoshi
    • ロシア地質学海洋鉱物資源研究所 All-Russia Research Institute for Geology and Mineral Resources of the World Ocean, St. Petersburg
    • MATVEEVA Tatiana
    • ロシア地質学海洋鉱物資源研究所 All-Russia Research Institute for Geology and Mineral Resources of the World Ocean, St. Petersburg
    • JIN Young K.
    • 韓国海洋研究開発研究所韓国極地研究所 Korea Polar Research Institute, KORDI
    • OBZHIROV Anatoly
    • ロシア科学アカデミー極東支部V.I.イリチェフ太平洋海洋学研究所 V.I. Il'ichev Pacific Oceanological Institute FEB RAS

抄録

 New hydrate-bearing seepage structures off Sakhalin in the Sea of Okhotsk were investigated from 2003 to 2006 within the framework of the CHAOS project. We obtained samples of natural gas hydrate and measured the molecular and isotopic compositions of hydrate-bound gas. Methane δ<sup>13</sup>C and δD were in the range of -67 to -63‰ and -207 to -193‰, respectively. These results indicate a microbial origin produced by CO<sub>2</sub> reduction according to Whiticar's diagram. Because ethane δ<sup>13</sup>C showed a thermogenic origin, hydrate-bound gas contains a small amount of thermogenic gas. The hydration numbers of the samples were estimated as 6.19 ± 0.02 using the Raman spectra of the C–H stretching mode and a thermodynamic calculation. Heat flow calorimetry revealed that the values for dissociation heat of the samples were 18.1 ± 0.3 kJ mol<sup>-1</sup> (from hydrate phase to gas and ice phases) and 55.4 ± 0.4 kJ mol<sup>-1</sup> (from hydrate phase to gas and water phases), which agree well with the values in of literature.

収録刊行物

  • 地學雜誌

    地學雜誌 118(1), 207-221, 2009-03-25

    公益社団法人 東京地学協会

参考文献:  47件中 1-47件 を表示

被引用文献:  4件中 1-4件 を表示

各種コード

  • NII論文ID(NAID)
    10030365083
  • NII書誌ID(NCID)
    AN00322536
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0022135X
  • NDL 記事登録ID
    10232851
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-169
  • データ提供元
    CJP書誌  CJP引用  NDL  IR  J-STAGE 
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