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Gold/Mining/Energy : Nuinsco Resources (NWI) -- Ignore unavailable to you. Want to Upgrade?

To: Tom Cat who wrote (1253)	3/6/1999 11:50:00 AM
From: Enigma	Respond to of 5821

Eric - I think most of your protagonists are away for the weekend. dd

To: Tom Cat who wrote (1253)	3/6/1999 12:53:00 PM
From: 1st.mate	Respond to of 5821

He spoke to superman who dug into the earths crust and see all!<ggg>

To: Tom Cat who wrote (1253)	3/6/1999 1:47:00 PM
From: E. Charters	Read Replies (1) \| Respond to of 5821

I have spoken to F. Puskas in the past but not about this story. I did argue with him once about Sudbury paragenisis. I cannot say that he agreed. I spoke to O'Brien from NVE about Puskas take on the core. It was favourable. Puskas of course worked for Inco as a senior geologist for many a year and for Nuinsco recently as a consultant. I don't claim you should understand what the brouhaha is about but I can simplify it for you. Hutchinson, Sanster, Holyk, Darke, Parke and McDiarmid are some of the geologists of the past 20 years who have led the thinking in adducing that most massive sulphide ore bodies where formed by hot spring water "vents" spewing mineral laden waters onto the seafloor and the orebodies forming by cooling and precipitation. This has since been proven by study by Franklin (GSC) on orebodies in copper forming off the west coast 200 miles from Vancouver that expeditions have been filming by undersea camera. From this we know have a feel for the extremely short time it takes an orebody to form and in what rock and fault environment. We can call these bodies sedimentary exhalative OR volcanigenic massive sulphide. The process is the same, hot water deposition on the sea bottom surface of the planet, driven by nearby volcanoes or melt conditions caused by colliding and subducting tectonic plates. We can also infer that the same mineral waters would fill veins and other openings in the same manner but with greater pressure. It has long been accepted that iron formation of FES or Fe3O4 or Fe2O3 where formed much like this as a chemical precipitant in water. Few accept that hot vents did it but I aver the environment is the same. These orebodies frequently interlayer with silica or alternate mineral types such as layer of pyrite, layer of lead zinc.. leading to the description banded ore. Where the controversy lies is that I aver the same process must have been operative for copper nickel deposits as well as the process-accepted copper zinc deposits. I am saying that from observation of the geological chronology evidenced by the character of the rock mass or suite and its physical boundaries as well as the abundant sea bed evidence and similarity to the environment of the copper-zinc deposits. These characterstics are often ignored by the opposing theorist who naturally have to find other explanations. For instance in the rock of the layers overlying the Sudbury orebodies we see quench features. Quenched by what? Water? Perhaps :) Go further into the Sudbury basin and we have the Whitewater group. What are they? Water borne sediments. So when did this water arrive? I have news for you. We know the basin was always underwater. So whatever ore was formed in Sudbury was definitely aided by a blanket of seawater. Was the ore intruded? The authorities once thought so but as hydrothermal (hot water) solutions! In other words veins. But there is little evidence for that. The other intrusions form blankets surrounding the rim. I aver that if the norite bodies were intrusions they have fortuitously conformed to lap the rim of the basin for 100's of miles just as a beach would lap the shore of a lake. Why if it were a violent intruding rock would it do that? Would it not fill every nook and granny and fissure and obliterate every surrounding rock in a haphazard pattern? Why form a layer, "just like a volcanic flow does? Why indeed. And what rock was on the inward side of the basin inside the sublayer for it to intrude? Isn't it logical that the Whitewater group came later when placid sedimentation set in and the violent volcanics events had died down? The violent events of the norite would disrupt the sediments and show evidence of its later character. What the magmatist would have you believe is that the intrusive Sudbury events happened after the sediments had formed and the last intrusive event was the ore, preceded by the amazingly compliant_to_the_basin_edge norite. This and about 20 other pieces of evidence allow me to see that the intrusion theory is weak. However the flow and subaqueous environment is very strong, simple and logical. Logic favours the more economical theory. To say that the different chemical nature of copper nickel ore begs it to be formed differently is not sufficiently compelling. Nickel sulphide is known to form at a temperature of 350 degree centigrade or the exact temperature of the hotspring vents we have measure today in the straits of Juan de Fuca. EC<:-}