ABSTRACT

This paper investigates the capability of the resistivity and induced polarization (IP) methods to delineate skarn alteration haloes within the Qale-Alimoradkhan skarn copper deposit. This deposit is located in the Sanandaj-Sirjan geological and structural zone, Hamedan province, Iran. It is understood that fresh limestone and metamorphosed limy units including skarns represent high resistivity anomalies whereas granodiorite intrusions represent medium to low resistivity responses. Four profiles were selected to explore the sulfide-rich zones within the deposit using the Combined Resistivity Sounding and Profiling (CRSP) array. After the appropriate selection of inversion parameters, the inverted models were in good agreement with the known geological features. The resistivity response of the intrusive rocks were found to be alteration dependent. Furthermore, IP targets likely represent sulfide-rich zones. Our study suggests that if preexisting knowledge regarding the geological setting is available, then resistivity and IP can be helpful in the exploration of skarn mineralization.

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