| 講演要旨(和文) | | 低対地高度物理探査は短時間に測定出来、費用対効果も良好で有益な地熱資源評価法である。細かい測定間隔であり、２５mの密な２次元グリッド解析が可能である。ポアソンの関係式に基づくＭＷＰ法重磁力相関性解析を重力偏差と磁力データに適用すると、表層近くの詳細な磁化コントラスト/密度差比分布が得られる。それらは線形分布し、圧縮場における構造形成に整合する。断層解釈に資し、断層のタイプ、熱源或いは貯留層等の地熱資源評価に役立つ。 |
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| | 講演要旨(英文) | | Airborne geophysical surveys acquired at low flight height close to the ground are the quick, effective and cost-saving method to evaluate the geothermal resources potential. The two-dimensional analysis can be achieved with such a fine grid interval as 25m. The integrated analysis of gravity-gradient and geomagnetic survey data applying the moving window Poisson's analysis will lead to the assessment of the detailed near-surface magnetization-to-density ratio. The faults are properly interpreted by the linearity of magnetization-to-density ratio, which is formed under the regional compressional stress fields. The application of the observation data is satisfactory enough to reveal the type of faults, heat sources and reservoirs of geothermal fluid, etc. |
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