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Excerpt from Geology and Ore Deposits of the Yerington District, Nevada About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Notes on Some Mining Districts in Eastern Nevada Up to 'the year 1908 the work of the Geological Survey in Nevada had consisted of regional geologic reconnaissance, the detailed study of certain important mining districts, and the reconnaissance of a few of the less productive or less active districts, the work last named being incidental to other investigations. During that year a begin ning was made in an effort to obtain some first-hand knowledge of the geologic relations of the ores in Virtually all the mining dis tricts of Nevada. One object of this work was to gather material which might subsequently be used in a general summary report on the geology and ore deposits of the State. Another was to pro cure and disseminate information concerning the less known and to a large extent undeveloped and comparatively inaccessible dis tricts. In pursuance of this plan a number of reconnaissance re ports1 have been published. The present report completes the series. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from The Geology and Ore Deposit of the Reese River District Lander County Nevada The veins in the quartz monzonite correspond in attitude to most of the diverse sets of joint planes traversing. That rock, although in each locality particular trends of veins predominate. Most of the productive veins on Lander Hill range in strike from N. 20° W. To N 40° W., and dip 25° - 45° ne. In the southwestern part of the district most veins strike N. 20° - 60° E. And dip steeply northwest. Farther east the principal veins strike nearly north and dip both east and west. In the southeastern part of the district the more. Persistent veins strike N. 10° 40° E. And dip steeply. Locally the vein pattern is reticulate, and throughout the district innumerable minor veins cross and branch from the main ones. Many of the discontinuities and irregularities in the veins result from the complexity of the original vein systems rather than from later fracturing. Ore shoots are in part related to cross fractures and intersections of veins. Postmineral faults are widespread, but displacements on them are commonly small. The veins are genetically related to the quartz monzonite. Vein filling began when the temperature of the rock was high and continued until it had dropped markedly. The vein-forming solutions migrated through preexisting openings, mainly joints, that were modified and enlarged by movements during mineraliza tion. In a few places vein quartz distinctly different from that in most of the veins is present. Its character suggests that it formed at lower temperatures and pressure, possibly during the volcanism that occurred long after the main period of mineralization. The Reese River district has been intensively prospected. Most of the prom ising areas have been tested. Exploration beneath the old workings on Lander Hill and in the relatively undeveloped area around the Union mine seems to offer better chances for finding ore like that originally mined than exploration in localities farther from the original discoveries. The veins in outlying areas seem, in general, lower in grade. They contain some metals other than silver, but, with the possible exception of gold, these hardly seem of significance with reference to the future of the district. Some of the veins in the quartzite are sufficiently large to be mined by cheaper methods than those applicable on Lander Hill. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Excerpt from Geology of the Tonopah Mining District, Nevada About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.