Geology of the Tonopah mining district, Nevada,
U.S. Geological Survey professional paper ;
Series: A, Economic geology ;
Series: B, Descriptive geology ;
Geological Survey professional paper ;
Series A--Economic geology ;
Series B--Descriptive geology ;
Letter of transmittal -- Outline of paper -- Introduction -- Location -- Topography -- Discovery -- Development -- Treatment of ores -- Water supply -- Fuel and power -- Chapter I. -- General geology -- Description of the rock formations -- Summary of geological history -- Age of the rocks at Tonopah -- Principles of faulting -- Chapter II. -- Mineral veins -- Veins of the earlier andesite -- Chapter III. Present subterranean ater -- Water encountered in mining operations -- Outcropping water-zones -- Distribution and explanation of water zones -- Usual absorption of precipitation by rocks -- Chapter IV. -- Physiography -- Origin of the range of hills -- Sketch of Tertiary and Pleistocene erosion -- Features of erosion in arid climates -- Precipitation in region near Tonopah -- Dependence at Tonopah of topographic relief upon rock resistance -- Effects of faulting upon the topography -- Chapter V. -- Descriptive geology of mines and prospects -- The known earlier andesite veins -- Other exploratory workings, wholly or partly in early andesite -- Explorations on veins at the contacts of the Oddie rhyolite -- Shafts at the unmineralized contact of the Oddie rhyolite -- Explorations on veins at the contact of the Tonopah rhyolite-dacite -- Shafts at the unmineralized contact of the Tonopah rhyolite-dacite -- Shafts at the contact of the Brougher dacite -- Explorations on veins at the contact of the TOnopah rhyolite-dacite -- Shafts at the unmineralized contact of the Tonopah rhyolite-dacite -- Shafts at the contact of the Brougher dacite -- Shafts wholly or chiefly in the dacitic tuffs -- Shafts entirely or chiefly in later andesite -- Chapter VI. -- Rock alteration connected with mineralization -- Alteration of the earlier andesite -- Alteration of the later andesite -- Alteration of the Oddie rhyolite -- Chapter VII. -- Origin of mineral veins -- Origin of the mineralizing and altering waters -- Characteristics of Nevada hot springs -- Origin of extinct hot springs at Tonopah -- Nature of solfataric action -- Minerals deposited around fumaroles -- Conclusions as to genesis of Tonopah ores -- Chapter VIII. -- Increase of temperature with depth -- Method of measurement -- Temperatures in the Mizpah Extension and the Ohio Tonopah -- Temperatures in the Montana Tonopah -- Temperatures in Mizpah Hill workings -- Thermal surveys on the Comstock -- Comparison of Comstock and Tonopah data -- Chapter IX. -- Comparison with similar ore deposits elsewhere -- Veins of Pachuca and Real del Monte, in Mexico -- Other similar mineral districts in Mexico -- The Comstock lode -- Silver City and De Lamar districts, Idaho -- Relation of the described districts to Tonopah -- The petrographic province of the Great Basin -- Extension of the Great Basin petrographic province into Mexico -- Probable still further extension of the Great Basin-Mexico petrographic province -- A metallographic province coextensive with the petrographic province -- Origin of shoots or bonanzas in the veins of this metallographic province -- Existence of a major Pacific Tertiary petro-metallographic zone.