| 講演要旨(和文) | | 山川地熱地域の3次元構造把握を目的に，反射法・屈折法統合による解析が実施された．反射法処理では，様々なノイズ抑制処理を複合的に適用することでS/N比の改善が図られた．また5次元内挿処理により欠損トレースの補完が行われ，浅部における反射波の連続性が向上した．3次元屈折トモグラフィー解析では当地域の地質状況と調和的な3次元速度構造が得られた．屈折トモグラフィー解析によって得られた速度は3次元反射法調査における重合速度解析の参照としてだけでなく，構造解釈の傍証として有益であった． |
|
|
| | 講演要旨(英文) | | Reflection and refraction data analysis was carried out with the aim of understanding 3D structure at Yamagawa geothermal area. In reflection data analysis, we could improve the S/N ratio by adapting various noise elimination techniques. In addition, we adapted 5D interpolation technique in order to predict missing data, and could get better continuity of shallow events. In refraction tomography analysis, we could obtain a 3D velocity structure which approximately corresponds to the geologic interpretation of the area. The result of the tomography analysis was useful not only as a reference of the stacking velocity analysis in reflection data analysis but also as a supporting evidence of the geothermal structural interpretation. |
|
|
|
| |
|