Ore-Deposits; A Sequel to the 2D Ed. of the Genesis of Ore-Deposits

Ore-Deposits; A Sequel to the 2D Ed. of the Genesis of Ore-Deposits

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 edition. Excerpt: ...possible to get them, and they were ready for analysis; the results are shown in Table XII. Table XII.--Analyses of Nickel-Bearing Mineral.11 Ratios. (S-1.00.) Location. Cu. j SI.! Co. Fe. S.';; S. Ni+Co.' Fe. Per Cent. I Per Cent!, Per Cent. Percent. PeTcent.," 1. Creighton 0 34.82, 0.84 30.00 32.90 1 1.00 0.589 j 0.518 2. Worthington... 0 33.70 j 0.78 1 29.17 32.30 1.00 0.583 I 0.517 3. Frood 0 34.98 0.85 30.04 33.30 1.00 0.58s 1 0.513 4. Copper Cliff'. 0 34.23 0.85 I 30.25 J 33.42 j 1.00-0.573 0.518 "The small amount of residue consisted of siliceous gangue. These analyses were made in the laboratory of the School of Mining, Kingston, Ont., which was kindly placed at the writer's disposal. Penfield, American Journal of Science, Third Series, vol. xlv., No. 270, p. 493 (June, 1893). The composition of the non-magnetic residue at once suggests pentlandite, and as such Penfield describes the sample he examined (No. 4 in Table XII.). The pentlandite from Lillehammer, Norway, corresponds very closely to it in physical properties, but carries a lower percentage of nickel (20 to 22 per cent.) The Sudbury mineral occurs, in part, finely disseminated through the pyrrhotite, so that it cannot be detected, even with the aid of a lens, and partly in larger grains and segregations, at times an inch in diameter. Usually it possesses the characteristic platy structure and octahedral parting, though this is at times obscured. On fresh fracture, the mineral has a light steel-gray or silver-white color, which soon changes on exposure to the peculiar and characteristic light bronze-yellow. When fresh and massive it is with difficulty to be distinguished from the fresh pyrrhotite, but on a slight superficial oxidation the difference becomes quite...
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Product details

  • Paperback | 394 pages
  • 189 x 246 x 21mm | 703g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236519639
  • 9781236519634