Mohave County miner., 1913-01-11
Grand Gulch Mines.

Grand Guich Mines.
 Up in the Bently mining district, the country just above the Colorado river in Mohave county, lies the Grand Gulch mines, one of the most peculiar copper bearing deposits in the United States. Discovered about half cen tury ago It has been a constant pro- ducer of rich copper ore. The first ores from this mine was smelted in a little adobe furnace on the property, but it was found that good results were not obtainable, and the owners intermittantly made shipments to the | big smelteries at Salt Lake City. The ores shipped in these early days gave values in excess of 65 per cent copper. | Now that the railroad is within forty miles of the mines a lesser grade of ore is being shipped out, but the ton- | mage has been increased to l50 tons monthly. The ore is hauled to St | Thomas, where the branch line from | M oapa terminates. The ore is treat ed at Salt Lake. IL is estimated that | the mine has increased it's tonnage | fully one hundred per cent during the year and the recei pts from ore sales have been more than one hundred per cent over that of last year. The e,- limated value from copper and silver is l27, ,75lS
 The Union Basin Mining Company.
 The Union Basin Mining company is the one distinctive corporation operating in Arizona that is making good shipping zinc ores to market. During the year just past the company has shipped 70 the shelter at Bartles- vile, Oklahoma, II 800 tons of crude ore and concentrates, from which re- turns of 244 ,400S was received from the zinc and 23,6OOs from the gold and silver content, f. O. b. Mineral station. In 1911 this mine produced only ll6 6,000S, showing net gain in production of l52,000S. During the year just passed development begun the year before was continued, the drift from the Prosperity being driven into Golconda ground and the mine practically cleared of the big body of water that impeded sinking. The shaft is now being carried down to the 800 level, good shipping ore being en- countered below the old level.
 The milling plant that has been amplfed and bettered treated 2l,6O0 tons of dump ores during the year, making rich grade of concentrates Of the ore shipped to the ovens at Bartlesvle sixty per cent was from concentrates thus made, forty per cent going out directly from the mine.
 In the mines drifts have been driven along the big veins and systematic method of development carried on. The company has practically merged all the properties surrounding the Golconda. the Tub vein being the one contiguous property that gave massive indications of it's mineral bear ing ore bodies, although along the i line of the Prosperity drift some ex- | cellent zinc ore was encountered ap plrently continuation of the ore zone of the Golconda, which is con- | tinuation of the same vein system. In the Tub the vein IS more than 50 feet wide ard carries values in gold. silver, f copper. lead, iron and zinc. Some of the ore has been shipped to market, the heavy zinc ore having been cobbed by hand to bring it to the right per. centage to make it profitable.
 The ores and concentrates from the Golconda mill are delivered by tram to the bins at the foot of the incline, whence haulage is by team to Mineral station. The delivery of ore at the station the past several months has run about HOO tons, which tonnage is to be increased as rapidly as possible.
 Since the property was taken over from E. F. Thompson and Mary E. B. Smith, operations have been under the direct supervision of John Boyle, IT,, and to him is due the credit of the big success achieved.
 The Gold Road Mines Company.
 We regret our inability to give the production of the Gold Road mines for