I'm Terry J. Crebs, a California Registered Geophysicist who's been "reading between the mines" now for over forty years. Summarized below is my mining and geophysics experience. I began my mining career in the late 1960's working Kennecott's Bingham Canyon UT porphyry-copper mine. During the 1970's I received my BS and MS degrees in mining geophysics from the University of Utah. In the late 1970's and 1980's I worked for The Anaconda Company conducting both borehole-geophysical research and mineral exploration. From 1985-1993, I was senior geophysicist for Atlantic Richfield Corporation and designed/interpreted gravity, aeromagnetic, MT, and 3D-seismic surveys for oil/gas exploration throughout the western US. From 1994-1996, I was Chief Geophysicist for Diamond Fields Resources, Inc. during the discovery and evaluation of the world-class Voisey's Bay Ni-Cu-Co deposits of Labrador, Canada. I also led DFR's exploration programs in Greenland and Europe. Since 1997, I've been a freelance consulting geophysicist based in Lakewood, Colorado USA. In the last twenty years, I haven't discovered any orebodies as exciting as VB, but HEM surveying of layered intrusions and AEM surveying for Canadian kimberlites often look promising.
I've been fortunate to have designed and conducted geophysical surveys over many of the world's major mining districts. These include: Bingham Canyon, UT; Butte, MT; Coeur D'Alene, ID; Tintic, UT; Ely, NV; Leadville, CO; Stillwater, MT; Prairie Creek, AR; Carlin, NV; Grants, NM; Green Mountain, WY; Australia's Mt. Isa Mines and Giles Complex; Zambia's Copper Belt; Norway's Rogaland Anorthosites; Canada's Voisey's Bay, Sept Isles, Tintina, Flin Flon, James Bay, Kluane, Lac de Gras, and northeast Manitoba (diamonds); Madagascar's Anorthosite Belts; Greenland's Gardar; and, Finland's Diamond and PGE Belts. While I have extensive experience in uranium, epithermal, and porphyry mineralization, my passion and most recent successes are mafic and ultramafic magmatic-sulfide mineralization, PGE's, and diamonds.