Bisbee daily review., 1914-01-25

 ack fwater has made the use of the lrdinary methods of milling impossi- ble for the concentration of these ores. As a consequence, only the higher grades of ore have been ex- plotted. the mining has resulted in much waste of medium or low grade ore, and the shipments have been chiefly made from the small pockets of ore which contain comparatively large amounts of uranium oxide The employment of such wasteful methods of mining and rough hand-sorting is to be deprecated. because the pockets of high grade ore may soon be ex- hausted. leaving large quantities of ore containing less than e U,O, which it might be impossible to util. ibe.
 The production from the Utah fields has been small on account of the low grade of the ore. During the year 1912 a total of 346 tons was shipped from Green river. Thompsons. and Cisco-the only places in Utah from
 
 ore probably averaged less than 29s U3 Os The ore occurs in starta of coarse sandstoneo verlain with fine | conglomerate The ore.bearing pore tions vary in thickness from few inches 10 about five feet The carno tie occurs in cracks. or Assures, in | small pockets or vags. or impregnat- ing the sandstone Small pockets of red vanadium ore, probably calcium vanadate, are found in some places in the sandstone. The Thompsons de- | posits are almost flat bedded. Mining there has been confined to the best outcrops. and the low-grade ore from hand sorting was thrown on the dump.
 The principal production of carno. tite ore in Colorado has come from | Paradox valley and Surrounding dis tricts in Montrose and San Miguel counties. In Rio Blanco and Routt county the cost of transportation has been too hgh to permit of shipping ore at Q profit. In the Paradox Valley region the typical ore is a sandstone so impregnated with yellow carnotite that the color is quite noticeable. A considerable part of the ore Is com. posed of small kidneys of brown sandy clay which contain vanadium High-grade carnotite often occurs in vugs, and this ore is so soft that it can be nodded in the fingers. In places the sandstone is impregnated along the lines of stratification. and in alter nate layers of carnotite and dark van adium ore. The deposits are usually pockets of ore, many of which are large, however, as the extraction oi 30 tons of shipping ore from a single chain is not unusual. The ore is found in the McElmo formation (Jura Trias). This is light colored sand stone oyerlain in places with shale and conglomerates. Beneath it lies the La Plata sandstone. and below tha, the Dolores red sandstone.
 Some desultory work was done in these districts from 1886 until 1909 and a considerable amount of urani um oxide was shipped from time tc time. Mining in Paradox valley was not actively carried on until the form nation of the General Vanadium Go in 1909. In 1910 the Standard Chem ical Co.,, of Pittsburgh, began work ir this district, and these two companies 1 are now the largest operators there In 1912 the American Rare Metals Co bought the Dolores mill in the McIn | tyre district The General Vanadiun Co. has about 60 claims, and thu [ Standard Chemical Co., about 90 mos of these claims are in the Long Park Club Ranch, and East Paradox dis tricts. The Radium Extraction Co. Crucible Steel Co.,, and Primos Chem ical Co. have done some work on sev , eral claims in Long Park, but nc