Mineral Resources of the States and Territories West of the Rocky Mountains ..., Volume 7U.S. Government Printing Office, 1875 - Gold mines and mining |
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50 feet Alpine County amount assay auriferous average base bullion bed-rock Belcher bullion California Cañon cargas carried cent claim coal coke company's Consolidated contains copper cost country-rock County Creek cross-cut Crown Point deposits depth developed distance district ditch dividends drift east Eureka expenses extracted feet deep feet long feet wide flume Fork furnace galena Georgetown gold Gold Hill granite Grass Valley gravel gray copper ground gulch Hill hoisting hydraulic inches incline iron lead ledge limestone located lode metals miles mill miners Mining Company Mount Gregory Mountain Napa County nearly operations ore-body ounces owners oxide Placerville porphyry portion pounds profit pyrites quantity quartz quartzite quicksilver rich River roasting rock seams shaft shows Sierra County Sierra Nevada silver slag slates smelting Sonoma County stamps stoping sulphurets sunk supply surface tailings thick tons Total tunnel Valley vein winze yield
Popular passages
Page 190 - ... bounded on the west by the Pacific Ocean, and on the east by the 120th degree of longitude and the Rocky Mountains.
Page 478 - Later the discovery of gold in California in 1847, and in Australia in 1851, exercised a marked influence upon prices and caused the more extensive use of that metal as money.
Page 268 - Raymond, 1875, pp. 26H, 269. early yet to make any estimate of the future value of the discovery, but it is certainly the most promising vein of coal yet discovered in the State of Nevada, and I believe the first true coal found west of the Rocky Mountains, or perhaps west of the Missouri River, unless some of the Utah coals belong to the coal-measures of Carboniferous age. . . . About midway between White Pine and Pancake two or three mounds, which are identical, both lithologically and paleontologically,...
Page 324 - A tunnel across the Mammoth vein in the New World district shows 25 feet of solid ore, and the width of the vein is not known. " The New Caledonia shows a well-defined 6-foot vein. The Great Republic, Gurley, Ironclad, Houston, Woody, Silver Zone, Silver Gift, Blackfoot.
Page 327 - Territory, can he, used, as it now is, for blacksmithing. for making steam for locomotive and steamboat purposes, as well as for making gas and smelting iron, galena, and, in short, for every purpose for which soft Pennsylvania coal can be used. According to the reports of the .Secretary of the Interior, about 70,000 square miles, or half of Montana, is underlaid with coalbeds ; but this I regard as an overestimate.
Page 466 - ... 1. That looking to the world at large, the auriferous veinstones in the Lower Silurian rocks contain the greatest quantity of gold. 2. That where certain igneous eruptions penetrated...
Page 487 - The following is a copy of our annual statement of precious metals produced in the States and Territories west of the Missouri River (including British Columbia, and receipts by express from the West Coast States of Mexico) during 1888, which shows aggregate products as follows : Gold.
Page 200 - ... Consolidated crosscut No. 2, near the west clay. Fabulous reports and estimates have been given, varying from $150,000,000 to $1,500,000,000 "in sight." It is reasonable to suppose that the ground from the Best & Belcher north line to the Ophir south line and in depth from the 1300- to the 1550-foot level, will yield, judging from present developments and present yield, ore for two years to come at the present rate of extraction, viz, 450 to 580 tons daily. The quality of the ore is a matter...
Page 460 - The metals of the Quebec group seem to have been originally brought to the surface in watery solution, from which we conceive them to have been separated by the reducing agency of organic matter in the form of sulphurets, or in the native state, and mingled with the...
Page 324 - The ores could then be hauled in vast quantities to or near the Crow Agency, on the Yellowstone. "From crude assays, these ores will yield from 50 to 200 ounces of silver per ton, and from 70 to 80 per cent, of load. The mines are about 110 miles southeast of Bozoman.