. Transactions. ismainly of (juartz, siderite and calcite with a little barite. The vein, sofar as exploited, has a width of four to twenty-seven feet, rising to thegrass-roots. Values are maintained with depth, but are not markedlyincreasing. Concentrates and picked ore run from 75 to 150 ouncesin silver and 35 per cent. lead. Small picked specimens of tetrahedriteare said to run several thousand ounces in silver. The blende, whichis separated from the galena as far as possible in the concentration tBuUetin III, Hureau of Mines, Victoria, , 1897. 51° The Canadian Mining Institute. carries
. Transactions. ismainly of (juartz, siderite and calcite with a little barite. The vein, sofar as exploited, has a width of four to twenty-seven feet, rising to thegrass-roots. Values are maintained with depth, but are not markedlyincreasing. Concentrates and picked ore run from 75 to 150 ouncesin silver and 35 per cent. lead. Small picked specimens of tetrahedriteare said to run several thousand ounces in silver. The blende, whichis separated from the galena as far as possible in the concentration tBuUetin III, Hureau of Mines, Victoria, , 1897. 51° The Canadian Mining Institute. carries high values in silver. The richest part of the vein is generallyon the side of the hanging-wall. The hanging-wall is formed for ashort distance by a porphyritic dyke from which the vein curves asshown roughly in the sketch. There is no noticeable change in valuesat the contact. A large horse 30 feet thick and 130 feet long divides the vein atone point for 300 feet in depth. Values showed considerable increase. Sketch showing suggested origin of the North Star Ore Bodies. at the union of the two divisions of the vein at either end of this ore body shows no disturbance of any account through faulting. The ore body is opened up by adits cross-cutting the countryslates, with levels on the strike of the vein. Owing to the increase Notes on the Geology of South Eastern British Columbia. 511 with depth in the length of the adits, a shaft on the dip is being sunkfrom the fifth level. A well-equipped concentrating plant, with an abundant water-supply, is in operation. Example 2.—The St. Eugene. This vein or group of veins issituated near Moyie lake, a few miles from Cranbrook, in Fort Steelemining division. In 1900, the Fort Steele mining division made a greater increasein production than any other single mining division in British Colum-bia, the value of the mineral output having risen to almost three milliondollars, placing this district in total output second only to N
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