Rock Magnetism of Copper Ore from Noranda Mine, Province of Quebee, Canada.

The Noranda Mine in Rouyn, Township, Province of Quebec in Canada is one of the great copper mines of Canada. All the ores of the Noranda district are of the same general, type. They are massive sulphides, mixtures of pyrite, pyrhotite and chalcopyrite in varying properties. The ores have formed by replacement, usually of rhyolitic agglomerate and tuff, or of rhyolite lava shattered by folding or fault movements, the whole complex is cut by late pre-Cambrian diabase dykes. The Noranda orebodies are relatively short, thick masses with long axes dipping steeply or vertically. Figure 1 shows a geological sketch map of this area (Wilson 1941). Four rock samples were taken from sulphydic ore body, two samples from diabase dyke which cut the ore body in North-South direction nearly vertically and one from the contact zone of the diabase dyke. About ten cylindrical test specimens werer cut from each group i.e. forty test spec