| OCR Text |
Show 61 perpendicular, with an east and west slope. Fissure- veins are fonnd at a depth of 350 feet. The country rock is basaltic. No fossils occur. The ores are worked by smelting and by the process of iron precipitation. The ores are galena, carbonate of lead, and anglesite. AD average yield of $ 32 per ton in silver is obtained. Lead forms 67 per cent, of the ore. Iron is the other base metal. Traces of gold are found. Water has not yet been reached. The principal mines are the Flora Temple, Castle Dome, William Penn, Caledonia, Don Santiago, Little Willie, and Norma. The general character of the ore is the same throughout all of these, except the Castle Dome and Caledonia, in which anglesite and carbonates are found. Their claims vary in extent from 200 feet by 1,000 feet to 600 feet by 1,500 feet, and lie in the foot- hills and the mountains above. From the main lodes about 6,000 tons of ore have been extracted and taken away for redaction, at an expenditure of about $ 200,000. On the Colorado River, 18 miles from, the mines, the Castle Dome Smelting Company has a blast- furnace, with an engine of 20 horse- power. Its capacity is 20 tons per diem. The cost of a furnace constructed at the mines would be $ 12,000. Other expenses average as follows: Cost per ton for mining the ore, $ 8; for reducing the same, $ 9; mining labor per diem, $ 2; smelting labor, $ 2; running a tunnel on main vein, $ 3.50; sinking a shaft, $ 4; running a drift, $ 3. One man can stope from one to five tons of ore per diem, according to the size of the vein, or can extract six tons per diem. Expense will be reduced by the completion of the Southern Pacific Railroad to the Colorado River. There are a few horses, mules, and burros in the vicinity. There are no facilities for raising produce. Barley is worth $ 4 per hundred- weight. Alfalfa, wheat, corn, oats, sugar- cane, vegetables, cotton, fruits, and wild hemp can be procured at Yuma. The varieties of timber are cotton-wood, snwarrow, iron- wood, willow, and mesqaite. Water is scarce, the nearest supply being a good well 10 miles from the mine. The deer, mountain- sheep, antelope, quail, rabbit, and hare abound. There are 200 inhabitants in the district, besides about thejsame number of Date Creek Apache Indians. OOLOBADO DISTRICT, NEVADA. Examined by Dr. O. Loew, July 31, 1875. These mines are near the Colorado Eiver, along the foot- hills of the Black Mountains, in some cases approaching the summit of the same. In area this district is 3 miles wide by 7 miles long. A small island in the Colorado River forms its approximate southeast corner. Saint Thomas is the post- office. San Bernardino, Cal., 300 miles distant, is the nearest railway station. Freight from that point is 8 cents per pound. By steamer from San Francisco it is $ 75 per ton. This would be reduced by the extension of the Fort Yuma and Fort Mohave steamboat route to this point, which is 80 miles above Mohave. The district was discovered in 1861 by N. S. Louis. It was organized in the same year, and has been worked at intervals since. Previous geological investigations have been made by an assistant of Professor Sillimau, in 1865 ; by the State geologist of Nevada, in 1869 ; and by a party of this survey in 1871. The directiou of the mountains is north and south ; of the lodes, northeast and southwest. The veins are very distinct from the wail- rock, and conform, in dip and strike, |
