Annual report . 6 Sample (5) chipped, 200 ft. Iron Insoluble Phosphorus Sulphur trace. Samples 4 and 5 contained considerable linionito. The cliief impurities in the ore are silica, clay, limestone, sulpliur and organicmatter. The phosphorus is not abnormally high for this class of ore. Silica inthe form of sand and gravel was often observed in the inferior grades. The claycontent is also very higli in places, the silica and clay frequently forming thegreater part of the outcropping. Limestone is also present, often forming a breccia,the cementing material being siderite of in
Annual report . 6 Sample (5) chipped, 200 ft. Iron Insoluble Phosphorus Sulphur trace. Samples 4 and 5 contained considerable linionito. The cliief impurities in the ore are silica, clay, limestone, sulpliur and organicmatter. The phosphorus is not abnormally high for this class of ore. Silica inthe form of sand and gravel was often observed in the inferior grades. The claycontent is also very higli in places, the silica and clay frequently forming thegreater part of the outcropping. Limestone is also present, often forming a breccia,the cementing material being siderite of inferior quality. Sulphur is present inall the ore. Often this can be observed as small pockets of pyrites in cavities in thesiderite, and occasional specks of pyrite can be seen, with the aid of the glass, innearly every specimen observed. Organic matter is also contained in all the ore,but in varying quantity; some of the siderite contains so much organic matter that 1920 Pre=Cambrian Rocks and Iron Ore Deposits. ^2 Bureau of Mines No. 4 it is almost black in colour.^ The best quality ore contained per cent, organic matter is probably lignite, as occasional pockets and seams of lignitewere observed in the ore. From the foregoing analyses it is apparent that samples ^os. 1 to 5 representore of very inferior quality, while sample Xo. G represents siderite of good com-mercial grade. The latter will be referred to as the main ore body, and the formeras ore of inferior quality. Dimensions of Main Ore Body The main ore body has a maximum width of approximately 600 feetas nearly as could be determined. The small number of exposures and the over-burden of glacial debris made the width difficult to ascertain definitely. Thelateral extension could not be determined, as the I)ody ] on the southunder the glacial debris of the river bank; on the north it is exposed in the bottomof the river for a distance of about 600 feet, but is finally obscured by the dirtyriv
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
