Abstract: The relationship between the characteristics of geophysical field and the ore body in the mine was analyzed and summarized by introducing some prospecting practices which were used induced polarization gradient technique and precision magnetic measurement methods in Duobuza ore segment. The results show that IP anomalies characteristics is low apparent resistivity and high chargeability near ore body，and the polarization rate increased with the increase of metal sulfide content in the minerals. Ore body's abnormal characteristics of precision magnetic survey are low magnetic normal anomaly. Overall，the mine Geophysical anomalies distribute around the granite rock mass and the contact zone，and reflect the Ore granite porphyry and Mineralized alteration distribution range. The results provide the characteristics of geophysical fields to look for copper-gold deposit in Duolong in future.

Key words: Porphyry copper deposit, Induced polarization, High-precision magnetometry, Ore-prospecting model of synthetic geophysical, Duobuza