Identifier: graphite00cana (find matches)
Title: Graphite
Year: 1920 (1920s)
Authors: Canada. Mines Branch (1901-1936) Spence, Hugh S. (Hugh Swaine), 1885-
Subjects: Graphite
Publisher: Ottawa : Thomas Mulvey
Contributing Library: University of Connecticut Libraries
Digitizing Sponsor: LYRASIS Members and Sloan Foundation

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flake graphite so far known in either the United States or Canada.The average graphitic content of the ore is 65 per cent, but zones of richermaterial, ranging as high as 80 per cent, occur locally. Much of the oresecured, therefore, has been pure enough in its natural state to find employ-ment in foundry work, and practically the entire output of the mine wassold in a crude state previous to 1909. The ore-body in the vertical veinworked consists of a more or less homogeneous mass of graphite, averagingabout twenty feet in width. The maximum width, as determined in theunderground workings, is 70 feet. The ore-body strikes northeast and hasbeen traced for a distance of 800 feet, the width increasing from about 15feet at the westerly outcrop to 70 feet in the east workings. The deposithas a vertical dip, with well-defined walls, and pitches to the northeast DEPARTMENT OF MINES MINES BRANCH Hon.Martin Burrell, Minister R.G.M?Connell, Deputy Minister. Eugene Haanel, Ph.D., Director. 1919
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Base map, Depl. of Interior 515 GRAPHITE OCCURRENCES IN BROUGHAM AND BLITHFIELD TPS., ONTARIO Scale; 3*95 miles to one Inch Reference 1 Black Donald Graphite Co.(•) Mine equipped with millO Undeveloped prospect 37 at an angle varying from twenty to forty degrees. It is capped by lime-stone, and has been found to extend to a depth of at least 125 feet. Atthis point it appears to be cut ojf by limestone. This may be due tofaulting, or more possibly, folding. Its thickness varies from eighteento twenty-four feet for a proved distance of 600 feet, from which pointit swells out to a width of 70 feet. It is enclosed in crystalline, Grenvillelimestone, which is graphitic for several feet on each side of the ore-mass.At several places in the underground workings, narrow dikes of pegmatitehave been encountered cutting across the vein, and these are thus youngerthan the latter. While the ore consists of flake graphite, the greater partof the flake is of such small size as to preclude being cl

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