TREATMENT OF SCLPIIUEET ORES AT CHARACTERISTIC MIXES. 131
of ore was still standing above the 60-foot level. In order to extract this ore it became necessary to open the mine from the surface, and the open pit (3, fig. 22) was started. The ground was stripped to a depth of 15 feet, and from that point on the ore, though lean, was used in the mill. At 60 feet a diabase dike (8, fig. 22), lying parallel to the schistosity of the country, was encountered in cross-cutting and was at first believed to represent the hanging wall. On cutting through it, however (a distance of 4 feet), it was found to merely divide the ore-body. Under the altered conditions it became necessary to sink a new shaft (1, fig. 22) in the hanging wall as an outlet for the ore and for pumping. This shaft was sunk to a depth of 165 feet; connections were made by crosscuts with the present inclined shaft and everything prepared for taking out the shaft pillars, as well as the remainder of the ore. This is the present condition of the mine. The maximum thickness of the orebody at the Beguelin was 80 feet, and the best ore was found between the two large cross-dikes. A large amount of heavy sulphuretted ores is at present, in sight.
Five hundred feet northeast of the Beguelin mine are several open pits known as the Chase Hill (L, fig. 21). The character of the ore at this point is somewhat different, being a banded, colored slate, ban-en of sulphurets, but carrying several gold-bearing quartz-veinlets. Taken as a body it will not make ore.
To the northwest of the Beguelin are several ore-leads as yet unprospected.
The 60-stamp mill was run on Beguelin ores three years. The Cross mine was then reopened (1891). A plan of the Cross mine is given in fig. 23 showing the open pits and present underground workings, as well as some of the abandoned ones. After the water had been pumped out. and the old shaft Xo. 2 (a, fig. 23), 200 feet deep, was fully secured, a cross-cut was driven in a northwesterly direction from the bottom, a. distance of 25 feet., A drift (f, fig. 23) was started from that point in a southwesterly direction, reaching ore at a distance of 75 feet from the cross-cut. This drift, on being continued 200 feet, encountered a dike 25 feet thick, which was cut through and the drift carried on for 100 feet more. The old workings (d, fig. 23) were also continued through the dike, the drift (e, fig. 23) on the 100-foot level being run 100 feet beyond it. Four upraises were driven between these two levels, two on each side of the dike, opening up 4 large stopes of ore. This ore ran low in sulphurets, but carried more free gold and furnished one-half of the quota to the mill. In order to work the ores below the 200-foot level a new shaft (V, fig. 23) was sunk to a depth of 270 feet. A cross-cut was run from the bottom in a southwesterly direction for a distance of 75 feet; 15 feet from the shaft a drift (h, fig. 23), parallel to
