On the left, I’m interpreting HEM profiles and mapping magnetic-conductors caused by platinum-palladium mineralization in the Stillwater Complex of Montana, USA. This HEM survey established the continuity of a platinum-palladium-rich magnetic-conductors about 250-meters stratigraphically-above the JM-Reef. We named these new magnetic-conductors the Volatile-Enhanced Zones.
Hello, I’m Terry J. Crebs, a retired California-Registered Mining Geophysicist specializing in Helicopter-borne Electromagnetics/Magnetics (HEM) for ore exploration and mineral property evaluation. Please step inside and look around my website.
To the right is an image of the HEM survey equipment which in 1995 was used to discover the rich world-class massive-sulfide Ni-Cu-Co orebodies at Voisey’s Bay, Labrador, Canada. For this $572K/10,691-km survey, the A-star helicopter flew about 60 meters above the rolling terrain. The smaller magnetic-bird with an optically-pumped magnetometer hung 20 meters below the helicopter, and the larger yellow five-frequency Dighem EM-bird contained three coaxial and two coplanar coil-pairs and hung 30 meters below the helicopter.