Nickel Region Report: 1913

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In 1912-13 Coleman reviewed and revised his previous 1905 (Ontario Geological Survey) Report for the federal government in Ottawa. The Nickel Industry with Special Reference to the Sudbury Region (Report No.170) was published by the Mines Branch of the Department of Mines in 1913.

The Report described the geological formation of the nickel range,

The nickel region has sharply defined boundaries of a geological nature; since all the ore deposits are connected with a single great sheet of eruptive rock, roughly boat-shaped with a blunt bow to southwest and a square stern to the northeast, conforming to the general strike of the Archaean rocks of the district. Only the upturned edges of the sheet are exposed, since it is basin-shaped, and has its interior filled with sedimentary rocks. The basin is 36 miles long, from southwest to northeast, and 16 miles wide, and the known ore deposits are all either along the edge of the sheet or less than four miles away from it on projections or "offsets". … It is found … that the important deposits are not distributed uniformly round the basin but that there are rich portions separated by barren portions.

A.P. Coleman, The Nickel Industry, (Ottawa: Department of Mines, 1913), 2

Published work. A.P. Coleman, 1913. The Nickel Industry with Special Reference to the Sudbury Region (Report No.170). Ottawa: Department of Mines, Mines Branch, cover

Published work. A.P. Coleman, 1913. The Nickel Industry with Special Reference to the Sudbury Region (Report No.170). Ottawa: Department of Mines, Mines Branch, title page