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| | Abstract | | Induced polarization (IP) method is used in many cases of exploration for nonferrous metal deposits such as porphyry copper deposits and iron oxide copper gold deposits. This is because sulfide minerals such as pyrite and chalcopyrite have the IP effect. However, the target of exploration is a sulfide mineral containing valuable metals such as chalcopyrite, and pyrite is not generally targeted. One of the methods used to identify minerals is the spectral IP (SIP) method, which measures complex resistivity at many frequencies. Although the SIP effects on sulfide minerals or ores have been investigated, the SIP effect on chalcopyrite has not been thoroughly examined. To investigate the difference in the SIP effect between chalcopyrite and other minerals, we measured the complex resistivity of artificial samples that contained chalcopyrite particles. Then we tried to analyze the complex resistivity data using Cole-Cole model. The results show that the chargeability became larger as the content of particles is increased, and the time constant changes according the particle site. It was also confirmed that the frequency dependent coefficient of chalcopyrite differs from that of pyrite or magnetite. This indicates that the chalcopyrite and other minerals can be identified using SIP method. |
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