Show HOW GRANBY ORES WERE FORMED A special from granby B C says W L austin of new york a metallurgist trained in the great university of heidelberg at the request of directors of the granby last year studied the pheonix ore bodies he has paid a second visit lately elamin examination aaion he said a and n d after further these ores are really impregnations by vapors and mineral solutions of lava flows and ash beds formed by previous volcanic activity the whole character of the ore bearing rocks is eruptive the product of violent violani volcanic action the granby ore bodies are not altered limestone though there are here and there pockets of limestone scattered through the deposit in the upheaval which took place ages a ago 0 o portions of the original formation were evidently broken off and these are found today as islands surrounded by the lava flows or imbedded bedded im in the and ashes the lava flows and on phoenix mountain were later impre impregnated t bated with mineral forced into them by intense pressure and probably under great heat si S is the probable genesis of the granby area not dykes or even lodes you would not class them in any sense as dykes veins or even lodes no these ore bodies were not formed by the filling up of preexisting open spaces and are necess necessarily arlly very irregular in shape the was related and owing to the intense pressure of vapors and liquids and the permeability of the rocks it is probable that the would be more easily permeated than the lavas though the pressure would be so terrific as to mako make these things to some extent a matter of speculation the magma or reservoir of molten material to which these rocks on the granby mines owe their origin was of a character no I 1 know of no parallel case outside of the boundary in respect to the conditions obtaining at phoenix continuing mr austin pointed out that some of the gases contained iron in combination with some element or elements permitted the deposition of this metal in the form of specula rite te herma tite or oxide ot or iron some of the solutions containing lim lime as carbonate and as to the copper it was difficult to say whether it came in gaseous form or in solution their self fluxing flexing character the peculiar feature of the occurrence is of course the self fluxing flexing character of the ore a condition which has largely influenced the commercial success attending their treatment the silica contained in the eruptive is low less for instance than in the case of granite then the specula rite mixed through the mass and the lime existing as spar all assist in making a very satisfactory smelting smelling sm elting mixture As to the sulphur it probably came in with the other elements constituting the ore sulphur copper and iron have a strong affinity for each other and appear associated in the granby ore as they have taken out about a minion lion tons of ore since I 1 was last here in february 1905 no man is justified in fixing any definite limit to these mines |