| 講演要旨(和文) | | 金属鉱床探査において，IP法は試掘位置の決定には欠かせない物理探査手法の一つである．そのため，IP法は海外の金属鉱床探査では盛んに用いられており，最近ではより詳細な情報が得られるSIP法の適用も始まっている．しかし，国内ではほとんどの鉱山が閉山され，金属鉱床探査が行われなくなった．また，IP法の研究や教育を行う大学や研究機関もほとんどなくなり，IP法の技術者も数えるほどしかいない．そこで，SIP法の有効性を検証するため，以前に黒鉱の産出が行われていた秋田県小坂地区において，SIP法の実証試験を行った．取得されたSIP法データから解析された比抵抗構造や周波数効果の分布は，ボーリングデータから推定されている地質構造と調和的であった．また，この実験では最新のSIP法装置を使用し，電位電極の種類の影響やケーブル配置の影響も評価した． |
|
|
| | 講演要旨(英文) | | In metal resource exploration, the induced polarization (IP) method is one of the geophysical exploration techniques indispensable to the determination of a drilling position. Therefore, in the resource search for overseas, the IP method is used positively. These days, the spectral IP (SIP) method that can acquire the more detailed information on metallic minerals contained in the rocks began to be applied. In Japan, however, almost all mines were closed and mineral resource exploration is no longer performed. Now, there are almost no university and research institution which do the education and research of the IP method, its engineers also decreased sharply. In order to verify the effectiveness of the SIP method, we did the demonstration experiment of the SIP method in the Kosaka area, Akita, where kuroko (black ore) was produced before. The resistivity structures and the distribution of frequency effects analyzed from the SIP data for each frequency were consistent with the geologic structure estimated by boring data. In this experiment, the influence of the kind of potential electrodes and the influence of various cable layouts were also evaluated using the newest SIP equipment. |
|
|
|
| |
|