File:E-MJ - engineering and mining journal (1920) (14785229703).jpg

Identifier: emjengineeringmi110newy (find matches)
Title: E/MJ : engineering and mining journal
Year: 1920 (1920s)
Authors:
Subjects: Mineral industries Engineering
Publisher: New York : McGraw-Hill
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

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—Gold Apparently Scarce, Though Pyrites Is Not Uncommon— Silver, Lead, and Zinc Ores and Other Minerals Found in Minor Quantity By E. S. Moore Written exclusively for Jingineering and Mining Journal WITH the extension of the railroads northwardinto the previously little known regions ofnorthern Canada, interest in the possibility offinding ore deposits in Arctic Canada is daily increas-ing. The airplane has developed such efficiency as anew means of exploration that many mining men lookforward to the time when rapid excursions may bemade into the areas hitherto beyond the reach of all south. The Upper Huronian iron formations have beenfound underlying considerable areas in a number oflocalities, and the Keweenawan rocks, the parents ofthe Michigan copper, the Sudbury nickel, and the Cobaltsilver deposits, are spread over a great expanse fromthe southern end of Hudson Bay northeastward to theAtlantic and northward and northwestward to theArctic. During the Keweenawan period a great
Text Appearing After Image:
MAP OP NORTHERN CANADA, SHOWING DISTRIBUTION OF ORE DEPOSITS IX ARCTIC REGION.COPPER. HEAVY LINE INDICATES AREA WITHDRAWN FRO.M STAKING. •C INDICATKS except a few adventurous souls who were willing tomake long and perilous expeditions. Through the explo.itions of Low, Bell, Tyrrell,Stefansson, ONeill aii • inany others the world haslearned a little of the j sibilities of that tremendousarea which should surti, liarbor somewhere anotherKeweenaw Point, anothei -^udbury, Cobalt, or Mesabi.It has been known for some time that the rocks in thenorth-central part of the continent are chiefly pre-Cambriau and that they rossess many characteristicssimilar to those of the greai ore-bearing regions farther curved, volcanic zone extended from the Lake Superiorbasin through the Sudbury and Cobalt fields, along theHudson Bay basin to the Arctic, and in this disturbedzone extensive igneous activity manifested itself. Thetime during which this occurred was one of the mostnotable metallogenetic ep

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