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花崗岩中の透水構造の偏在を考慮した水理地質構造モデルの検討; 瑞浪超深地層研究所の壁面地質データからみた透水構造の特徴

Study of permeable structure distribution and hydrogeological structure model of granitic rocks; Features of the permeable structures deduced from the wall surface geological data of the Mizunami Underground Research Laboratory

野原 壯; 竹内 竜史; 酒井 利啓

Nohara, Tsuyoshi; Takeuchi, Ryuji; Sakai, Toshihiro

瑞浪超深地層研究所の断層や割れ目の特徴に着目して既存データ解析と地質学的調査を行い、サイトスケールにおける地下深部の花崗岩の地質学的および水理学的特徴を調べた。その結果、主な透水構造は、断層活動や熱水活動に伴い地質時代に形成された古い構造と関連することが明らかになった。また、地質構造の分布から、主な透水構造の分布を推定した。

Focusing on the characteristics of the faults and fractures of the MIU, based on analysis of existing data and on geological investigations, we examined the geological and hydrological features of the deep underground granitic rocks in the site scale. As a result, main permeable structures of granitic rocks can be associated with the old structures formed with the faulting and/or hydrothermal activity in geological times. Furthermore, we examined the distribution of the major permeable structures, based on the distribution of the geological structures.

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