Arizona silver belt., 1904-06-16

the fault for half mile. The upper level has yielded most of the ore, in the form of cuprite and malachite oc' curing as replacements in the quartz ite and lmetone, as the diabase en- countered in the second adit shows little naturalization. It Is interesting to note that chalcocite is found in the first level within 100 feet of the sur face, although usually it begins to ap- pear only near the lower limit of the oxides. at depth of several hundred feet. The Josh Billings ore body is a iissure vein in quartzite and diabase, but, in contrast with the Buffalo, the richest portion is associated with the diabaSe.
 The Big Johnny mine lies outside the limits of the mineralized region 1 just described, being about two miles north of the Gray shaft on the slope of Black peak, cone-shapped noun tain capped with diabase. The ores are oxides and carbonates filling the spaces in brecciated Quartzite. The crushed material occurs on line of Assuring and has an average width of ? feet. Work has been carried on through adlts and open cuts the de- posit has yielded quantity of good ore and preparations are under way to extend the exploration by means of a shaft, which has present depth of l25 feet.
 The Gaylord Globe properties join the Old Dominion and United Globe mines on the north. They cover four veins or mineralized Assures, includ- ing the extensions of the Buffalo and Josh Billings, owned by the United Globe company. They are not active producers as yet. The Buffilo tissure has been explored to depth of lit tie more than POO feet, and some ore has heen found which carries from 60 to 75 per cent of copper in the form of oxides intermixed with limonite and hematite.
 East of the United Globe mines is the Copper Hin group, owned by the Arizona Commercial company. A shaft has been sunk recently on one of the properties and is now down 620 feet. At the surface the ore occurs in a quartzite breccia, but it is said that the workings pass into diabase at shal- low depth. The company has shipped some ore to the Old Dominion smelter.
 Northwest of the town of Globe there are a number of mines which are capable, under favorable cOndi- tiOus, Of adding materially to the out put of the district, although AS yet they have not been extensively worked. la some cases the silicious character of the ores has been a drawback to their successful operation, since the ores produced elsewhere in the dis trict do not carry s fficient percent age of bases to afford good mixture for smelting. The Black Warrior Copper company has undertaken to treat these ores by Teaching with sul- phuric acid and has erected works for this purpose, as well as complete plant for making the acid. At pres. ent the works are closed down.
 At the Montgomery mine, owned by the Black Warrior company, the ore is soft chrysocolla which constitutes the filling of dacite tuH. Tie min aralized portion is about % feet thick, aud the ora seldom carries more than ! per cent copper. The Geneva mine, of the United Globe company, in the same locality, shows similar geological relations
 One of the most interesting mines in this region is the Keystone, some eight miles west from Globe. The ore is chrysocolla of a uniform and beau. tiful bluish-green color, occurring in a shered granite. The vein, 80 far as explored, is persistent, averaging about IS inches wide it has been opened by three drifts, which follow the strike for several hundred feet The rock on either side is more or less mineralized by stringers that branch of from the vein. Small quantities of carbonates are met with, and occa- sionally chalcocite and pyrite have have been noticed. The high-grade ore carries from 20 to 30 per cent cop. per and is shipped to outside smelters.
 The present situation in the Globe district gives encouragement to the view that the mining industry will soon enter upon an era of greater ac- tivity than it has known in the past. The output of copper within the next two years will probably reach 25,000, GOO pounds annually, and there is req son to believe that this rate can be maintained for long period to come. u@