Mineral Industries and Geology of Certain Areas - Vermont Agency ...

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C) C) 0 C) -a 5- a 0 S -a 0 5- I) 0 C) 5- REPORT OF THE VERMONT STATE GEOLOGIST. 35 was sought as a final product, but for years the ore, which, like almost all our Vermont copper ore, is chalcopyrite mixed with pyrite—that is, a mixture of copper pyrites and iron pyritescontaining usually only a small per cent, 2 to 10, of copper, has been mined only for copper, and this mine now has a furnace for reducing the ore to matte which contains a high percentage of pure copper, and during the year 1901, three hundred tons of matte, averaging 98 per cent of copper were produced. The entire output of this mine for 1901 was about 25,000 tons of ore. Practically all the copper produced in Vermont for a number of years has come from this mine. The ore body here is very large and very favorably located for successful operation. The old Ely-Goddard mine at Copperfield, of which Plate I gives a general view, which has for some years been idle and falling to ruin, was bought a couple of years ago by Mr. George Westinghouse, and since that time a large force of men have been busy putting it into working order. Plate II shows another portion of this mine and especially the dump heaps. At several other localities in the State more or less work has been expended in developing copper ore deposits, but none of these has as yet produced any metal. USEFUL MINERALS. S0APsT0NE.—There is some quarrying done in a few of the soapstone deposits, but so far as I have been able to ascertain only a small quantity of the material has been sold. TALc.—This mineral is found in numerous localities in the State and at some of them it occurs in large quantity. This is especially true of the beds at Stockbridge and Moretown. MIcA.—This mineral, while it is found in small flakes all over the State, does not occur in any quantity except in one locality, at Sherburne. This deposit, when I last saw it, promised well. As very few beds of usable mica have been found anywhere, even a moderately small bed of it may be valuable. Plates I and 11 by courtesy of The Vermonter.
36 REPORT OF THE VERMONT STATE GEOLOGIST. AsBEsTos.—There are two varieties of this mineral which are used commercially, both of which have been found in several localities in the State. One variety, often called tremolite, is a silicate of calcium and magnesium. This variety is often snowy white, but is likely to be brittle and is less useful than the other, which is the more common asbestos of trade. This latter is really a fibrous serpentine, a hydrous silicate of mag - nesium, called chrysotile. It is this chrysotile which is found in the localities where most attention has been given to the mineral. The principal deposits are in Eden, on Belvidere Mountain, in Lowell and in South Duxbury. On Belvidere Mountain five companies have done more or less work. These are; The New England Asbestos Mining and Milling Company, with headquarters at Fall River, Mass., on the south side of the mountain; The National Mining and Development Company, on the southeastern side; The Tucker Asbestos Company, on the northeast side, and a few miles northeast The Vermont Asbestos Company, which has opened a ledge in Lowell, and recently the United States Asbestos Company have opened the ledge east of the New England, and still further east the Lamoille Asbestos Company have bought the mining right. The last two expect to begin work in the spring. The New England Company has done by far the largest amount of work, and erected a large mill for grinding, etc. Plate III gives a view of Belvidere Mountain, showing the southern side. The large mass seen at the right of the mountain, forming a sort of shoulder, is composed wholly, at least so far as I could discover, of serpentine, which is traversed here and there, and often abundantly, by veins of chrysotile. This ridge is about ioo feet above the valley at its base. The highest part of the mountain, that which is at the left of the illustration, is not serpentine, but a great mass of hornblende schist. Professor J. F. Kemp, while working with theUnited States 0 0 0 0 0 '0 0
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