Compiled from the Year Book of British Columbia and Manual of Provincial Information; To Which Is Added a Chapter Containing Much Special Information Respecting the Canadian Yukon and Northern Territory Generally

Compiled from the Year Book of British Columbia and Manual of Provincial Information; To Which Is Added a Chapter Containing Much Special Information Respecting the Canadian Yukon and Northern Territory Generally

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ...work, and the Noble Five mill almost completed, with the erection of two, at least, contemplated this year0 The product or concentrates is silver-bearing galena, but any value contained in the decomposed material that may enter the mill, will in all probability not be saved, likewise that in much of the grey copper, which apparently slimes badly and escapes. The ore is shipped as "crude," or the solid or unaltered sulphides, or as "carbonates," i.e., the decomposed ore, consisting of oxides and carbonates of iron, lead and silver, the mass having a reddish-brown colour, with more or less yellow material; those carbonates with a soft, velvety feel, assaying highest in silver. All material about these veins should be carefully assayed before being relegated to the waste-dump, where good ore, unsuspected, nas already been thrown, especially soft, iron-stained, decomposed rock or vein matter. It might be well to be on the lookout for gold, remembering the good gold values found in the galena ores of the Monitor mine, which yield from $2 to $14 in gold per ton; one lot of twenty tons of crude ore assaying $20 per ton Gold m Sold, while the "carbonates" average $13, the smelter paying for all gold above $2, or one-tenth of an ounce. The "carbonates" seldom are as high grade in silver as the unaltered, or crude ore in the vein, but in some mines this class of ore is very valuable. In most of these veins the zinc blende carries a small silver value, and is juried or concentrated out of the ore, so that very little ore sent to the smelters has over 1o per cent, zinc limit. iJut Iu me Enterprise mine, on Ten-Mile Creek, the best silver assays are said to be got from the zinc blende, which is more valuable...show more

Product details

  • Paperback | 114 pages
  • 189 x 246 x 6mm | 218g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236796543
  • 9781236796547