University of Nevada, Las Vegas

Goldfield Mascot Mining Company p 10

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Tidewater railroad. Thus Goldfield will very soon be in direct railroad connection with three of the main western trunk lines instead of one as at present, and there will no longer be shortage of food and fuel, life necessaries, as of late.WHERE THE ORE IS FOUNDThe Goldfield district is situated topographically in a region of low hills rising to a height of 600 to 700 feet above the general level of the desert, which is 5,000 to 5,700 feet above sea level. The region is one almost entirely of eruptive or igneous rocks comprising various types of andesites and rhyolites, and the veins occupy the very irregular branching and intersecting channels of an extinct hot spring region, of which the reefs and ledges now existing as ridges upon the surface are the silicious envelopes. These ridges are thus prominent because of the erosion of the softer country rock adjoining. The principal ore-bearing rock is dacite, but payable veins are found in all the other andesites and rhyolites and within or in close proximity to these numerous outcropping ridges of quartz standing eight feet to twenty feet above the general surface are most of the ore-bearing veins of the district.Sometimes the natural vein outcrop is two to three feet wide, but as a rule the pay shoots are remarkably narrow at the surface. Many are only from one-half inch to six inches wide, and are therefore difficult to find by prospecting, and numerous shallow pits and surface trenches are dug before the location of the vein is discovered from which the rich "float" originated.The area within which values have been found is twenty-five miles, all of which, and much more, probably forty square miles in all, is fully covered by mining locations, duly surveyed and recorded; but within this large area there are so many individual owners that systematic development is still largely wanting.11




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