| 講演要旨(和文) | | 海底下の温度構造を推定する場合,海底堆積物の熱物性は重要な制約条件を与える.熱の移動が熱伝導のみの場合,海底下の温度構造は定常・非定常熱伝導方程式を解くことによって推定されるが,これには熱物性(熱伝導率,熱容量,熱拡散率)が物理パラメターとなる.海底堆積物の熱伝導率については多くの研究で計測・報告されているが,熱容量と熱拡散率については報告例がほとんどないのが現状である.本研究では,ファンデフーカ海嶺東翼で回収された海底堆積物の熱物性の特徴について報告する. |
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| | 講演要旨(英文) | | Characteristics of four thermal properties, thermal conductivity, heat capacity, specific heat, and thermal diffusivity, to porosity of marine sediments recovered in the eastern flank of the Juan de Fuca Ridge are reported. Vertical distributions of the thermal properties of sediments strongly depend on their lithological characteristics. For clay sediment, thermal conductivity and thermal diffusivity are positively correlated to porosity, whereas heat capacity and specific heat are correlated negatively to porosity. For sandy sediments, on the other hand, porosity and other properties seem to be constant. In the presentation, relations of thermal properties to porosity for the sediments are also examined. |
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