194 KEMP'S ORE DEPOSITS. 



much disturbed, and there are great faults and porphyry dikes and 

 knobs of granite associated with the sedimentary rocks. The ores 

 occur in belts, extending considerable distances, and these in places 

 have the rich chutes or chimneys of oxidized products. In Bing- 

 ham Cafion an immense bed of auriferous quartz is found, overly- 

 ing the lead zone and next the hanging. Some peculiarity about 

 the gold prevents its easy treatment, but much of the rock is very 

 low grade. Other fissure veins in the massive rock of the region 

 are known, but are of less importance. The general geological 

 relations suggest the deposits mentioned under Example 30 and 

 subtypes. The mines were the occasion of the first development 

 of the lead-silver smelters in the West, and have made Salt Lake 

 City an important center of the industry. The Telegraph group, 

 the Emma, Flagstaff, and others were famous mines in their day. 

 As will appear, nearly all the Utah mines are productive of lead- 

 silver ores. 



2.08.24. Example 35. Tooele County. Bedded veins in 

 limestone, or between it an 1 quartzite, and containing lead-silver 

 ores with ochers, in rich chutes. The deposits occur in the west 

 side of the Oquirrh range, in Ophir and Dry canons, over the di- 

 vide from Bingham. The principal mine is the Honorine. Fis- 

 sure veins also occur in the region, but are of less importance. 

 The Deep Creek district, near the Nevada line, is mentioned under 

 2.11. 04. 1 



2.08.25. Example 35#. Tintic District. Ore beds or belts, three 

 in number, and one to three miles long, generally parallel with 

 the stratification of vertical blue limestones, but sometimes run- 

 ning across them. The ore-bearing zone is from 300 to 600 feet 

 wide in at least one belt, and bears in places rich chutes of car- 

 bonate ore. The Crismon-Mammoth has been referred to under 



1 W. P. Blake, "Brief Description of the Emma MIDP," Amer. Jour. 

 Sci., ii., II. 216. C. E. Fenner, "The Telegraph Mine," School of Mines 

 Quarterly, July, 1893. O. J. Hollister, " Gold and Silver Mining in Utah," 

 M. E.,XVl. 3. Rec. D. B. Huntley, Tenth Census, Vol. XIII. , p. 407. 

 G. Lavagnino, "The Old Telegraph Mine," M. E., XVI. 25. " Little Cotton- 

 wood and Bingham, Utah,*' Engineering and Mining Journal, Aug. 14, 

 1880, p. 106 ; also July 19, 1889. J. S. Newberry, School of Mines Quarterly, 

 1884, p. 329. R. W. Raymond, Mineral Resources West of the Rocky Moun- 

 tains, 1868-76, and J. R. Brown, Ibid., 1867-68. Ann. Reps, of Director of 

 the Mint. B. Silliman, "Geological and Mineralogical Notes on Some 

 Mining Districts of Utah," Amer. Jour. Sci., iii., III. 195. 



