. The Canadian record of science. Natural history. 134 Canadian Record of Science. All the Scandinavian Nickel Deposits—perhaps 50 to 80 have been worked to a greater or less extent—are intimate- ly related to masses of gabbro, a rock composed of plagio- clase feldspar and augite, or of norite, a closely allied rock composed of plagioclase feldspar and hypersthene. The ore is Magnetic Pyrites, containing 3 to 5 per cent, of nickel and cobalt, which ore is a constituent of the gabbro but is principally concentrated along the contact of the gabbro with the surrounding gneissic rocks. The accompa
. The Canadian record of science. Natural history. 134 Canadian Record of Science. All the Scandinavian Nickel Deposits—perhaps 50 to 80 have been worked to a greater or less extent—are intimate- ly related to masses of gabbro, a rock composed of plagio- clase feldspar and augite, or of norite, a closely allied rock composed of plagioclase feldspar and hypersthene. The ore is Magnetic Pyrites, containing 3 to 5 per cent, of nickel and cobalt, which ore is a constituent of the gabbro but is principally concentrated along the contact of the gabbro with the surrounding gneissic rocks. The accompanying cuts illustrate the mode of its occurrence in three localities. The scale is in Fig. 1.—The Ntsten and Bamle M[^fES. a.—Red Gneiss. 6.—Black Gneiss and Mica Schist, c—Gabbro. The black portions are openings on pj'rrhotite holding 4 p. c. of Nickel. Associated with the Magnetic Pyrites (Fe^ Sg) are ordinary Iron Pyrite (Fe S.^) Copper Pyrite (Cu Fe ^^ and in some places Titanic Iron Ore. The Magnetic Pyrites when pure usually contains as be- fore mentioned 3 to 5 per cent, of nickel and cobalt, but as much as *7 per cent, is sometimes present. These metals are usually present in the proportion of one part of cobalt to from seven to twelve parts of nickel. The Iron Pyrites on the other hand usually contains more cobalt than nickel. Coppei- Pyrite is never present in large Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Society of Montreal. Montreal, Natural History Society
Size: 2379px × 1051px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1884
