Annual report . years 1899-1913, inclusive, almostall of which came from the Henderson talc mine. The balance was obtained fromdeposits at Eldorado and Gananoque. It was not until September, 1908, that the materialwas ground in Ontario. In that year the talc mill began operations at Madoc under themanagement of Geo. H. Gillespie, and the following table shows the rapid increase inthe production of the material after this date. It may be added that in 1911 a plant forgrinding talc was erected at Eldorado by the Canadian Talc and Silica Company,Limited, which is now producing, the crude talc bei
Annual report . years 1899-1913, inclusive, almostall of which came from the Henderson talc mine. The balance was obtained fromdeposits at Eldorado and Gananoque. It was not until September, 1908, that the materialwas ground in Ontario. In that year the talc mill began operations at Madoc under themanagement of Geo. H. Gillespie, and the following table shows the rapid increase inthe production of the material after this date. It may be added that in 1911 a plant forgrinding talc was erected at Eldorado by the Canadian Talc and Silica Company,Limited, which is now producing, the crude talc being obtained near the village. Tabic Showing Production of Tale in Southeastern Ontario, 1899-1913. Year. Tons. Value. 1S99 100 $ 500 1900 1,000 5,000 1901 400 1,400 1902 697 930 1903 920 2,625 1904 1,313 2,919 1905 1,120 2,240 1906 1,235 3,030 1907 1,870 5,010 1908 1,016 3,048 1909 4,350 8,700 1910 5,824 46,592 1911 5,404 47,725 1912 6,726 61,358 1913 8,238 74,500 Total 40,213 $265,577 116 Bureau of Mines No. 4. FIsr. 57. open pit. Henderson talc mine, .Madoc, Hastings county. 1913 The Pre=Cambrian Geology of Southeastern Ontario 117 ACTINOLITE Large bodies of actinolite occur in the townships of Elzevir and Kaladar in Hastingsand Addington counties. Hundreds of tons of the material, with which is often asso-ciated serpentine or talc, have in past years been ground, and used for roofing in several cities of the United States are roofed with this material. None ofthe occurrences are at present being worked. Seven of the more important open cuts, from which the actinolite has been shipped,are shown on the map.* Some of these occur on lots 4 and 5 in the seventh concessionof Elzevir township, about three miles east of the village of Actinolite. The materialhere is clearly a metamorphosed basalt, or other greenstone, of the Keewatin series,which has been altered by the great intrusian of Laurentian granite-gneiss. The lattersends immense dikes into the greenstone
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