Mineral exploration can be a tricky proposition and an undirected/uninformed drilling program is a large waste of money. Fortunately, geophysics can help and there are many geophysical methods that can be used to find buried mineral deposits from the surface of the earth. All before drilling begins! Dating back to the mid 1600s, mapping changes in the magnetic field was commonly used to find iron ore deposits. More recently, advances in electrical and electromagnetic methods have allowed these techniques to dominate the field of exploration geophysics, especially for metallic ore like copper and gold. HGI is a world expert in applying these methods, such as electrical resistivity, self potential, and induced polarization, to help the mining industry find and map the extent of ore bodies. Our acquisition methodology, processing, and interpretation is unparalleled in the industry.
HGI’s acquisition methodology, processing, and interpretation is unparalleled in the exploration geophysics industry. We routinely apply electrical resistivity, self potential, and induced polarization to find and map the extent of ore bodies. Our data and maps will save time, money, and increase value for your project.
HGI has conducted mineral exploration all over North and South America, from right here in our backyard of Arizona to map the extent of chalcocite (copper ore) to deep and desolate parts of Peru in search of gold. We can travel anywhere with our resident experts to ensure expedient and accurate results.
As an example, a resistivity and induced polarization survey was conducted over a copper porphyry system in central Arizona. We ran parallel profiles across the ore body at separations that were conducive for 3D modeling. Our dipole separation was 200m, allowing us to see up to 300m (1000 ft) deep. The top set of figures show a single profile in the middle of the survey area, a near vertical conductor is seen in the center of the profile, marking a major structural feature that likely provided the necessary conduit for creation of the mineralized zone. In the IP section below it, the high chargeability target is seen near the center and bottom of the profile. When these data were put into the 3D inversion model, an elongated target emerged to show the bounds of the mineralization, which stretches over 10 km. These data are being used to refine a drilling program and economic model for a mining feasibility study.