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
スポンサーリンク
概要
- 論文の詳細を見る
New hydrate-bearing seepage structures off Sakhalin in the Sea of Okhotsk were investigatedfrom 2003 to 2006 within the framework of the CHAOS project. We obtained samples of naturalgas hydrate and measured the molecular and isotopic compositions of hydrate-bound gas.Methane δ13C and δD were in the range of －67 to －63‰ and －207 to －193‰, respectively.These results indicate a microbial origin produced by CO2 reduction according to Whiticar's diagram.Because ethane δ13C showed a thermogenic origin, hydrate-bound gas contains a smallamount 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－1（ from hydrate phase to gas and ice phases） and 55.4±0.4 kJ mol－1（ from hydratephase to gas and water phases）, which agree well with the values in of literature.
- 東京地学協会の論文
東京地学協会 | 論文
- 五島列島福江島の鬼岳火山群基底で発見された約40万年前の寒冷期の海成層
- 特集「断層帯の物質科学と地震の発生過程」について (特集「断層帯の物質科学と地震の発生過程」)
- 綾瀬川断層の地形学的認定とその活動性
- 越後平野東縁, 庵地断層のトレンチ調査結果 : トレース長の短い活断層の評価
- 2004年新潟県中越地震の地表地震断層