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Gold/Mining/Energy : VOISEY BAY'S FIND - A NEW DISCOVERY -- Ignore unavailable to you. Want to Upgrade?

To: Ed Pakstas who wrote (464)	10/29/1997 8:11:00 PM
From: Terry J. Crebs	Read Replies (3) \| Respond to of 481

Thanx, Ed for getting Major General to put boundaries on their gravity map. The area's Bouguer Gravity signature means little to me--why are you so interested in a Bouguer Gravity Anomaly Map with a 3.00 density compensation?? (Didja notice it mimics the elevation--can you guess why--compare it with a topo map of the area)?? FYI, not even one VB-orebody in Labrador has been found using gravity geophysical techniques. I'm very skeptical that Donner-Teck can image a 1-meter, high-grade intercept at +170 metres using gravity. Also, why are Donner-Teck drilling boreholes on an EW-trend when the Bouguer gravity trend is obviously NNE near boreholes 97-67 and 97-75? There may be other reasons for that NNE gravity-high trend besides a keel of high-density troctolite--didja know some of the Archean gneisses have higher densities than the plutonic rocks. Always beware of geophysical hype coming out of Labrador. Also FYI, when Teck's geology-staff came to Voisey's Bay in May-95--they did ask me what the gravity over the Ovoid looked like. I told them gravity data were not acquired by DFR because it was too expensive and the technique cannot be used to detect deep orebodies in areas of rugged terrain. Well, it just so happened that INCO spent almost $500,000 (US) on a very expensive gravity survey of my old DFR holdings last fall; since then a project geophysicist for INCO has called the Voisey's Bay gravity survey a half-million-dollar "boondogle" (e.g., but they did show me that the very shallow Ovoid at 15-meters-depth did "scream" with beaucoup milligals of closure.) INCO now uses other geophysical techniques to image below +200 metres. I think INCO learned a very expensive lesson about gravity techniques in Labrador--I think Donner-Teck may soon learn a little lesson in exploration geophysics too. Regards and Good Luck, T. P.S. I'll be very surprised if gravity does prove useful in finding VB-type orebodies in Labrador; but, Mother Nature often loves to "humble" her shy but handsome geophysicists <grin>.