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Browsing by Subject "alteration"
Now showing items 1-20 of 37
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A geological study of the Betze gold deposit, Eureka County, Nevada
(University of Nevada, Reno, 1992)Regional tectonism, dated intrusive events, evidence of local episodic hydrothermal activity and alteration, and mineralogic, geochemical and oxygen stable isotopic evidence are evaluated to profile the Betze gold deposit's ... -
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Alteration and geochemical characteristics of the upper parts of selected porphyry systems, western Nevada
(University of Nevada, Reno, 1983)The alteration and geochemical characteristics of the upper parts of selected porphyry systems located in western Nevada were studied. -
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Alteration and mineralization of the northern half of the Aurora mining district, Mineral County, Nevada
(University of Nevada, Reno, 1985)Alteration and mineralization of the Aurora Mining District has been studied. Epithermal precious metal mineralization of the district is confined to 10.3 m. y. old quartz adularia veins in altered andesite. Alteration ... -
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Controls on ground water chemistry in central and western Nevada
(University of Nevada, Reno, 1982)Geochemical evolution of waters from the semi-arid western Great Basin and parts of the Sierra Nevada was analyzed using common techniques for computation of ionic speciation, classification, R-mode factor analysis and an ... -
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Geological investigation and ore reserve estimation of the Copper Chief (Ruby Hill) mine, Douglas County, Nevada
(University of Nevada, Reno, 1977)The geology of the Copper Chief Mine was studied and the ore reserves were estimated. Copper mineralization occurs mainly in the middle two members of the Veta Grande Formation. Ore reserve estimations indicate that 5279 ... -
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Geology and alteration of the Wedekind and part of the Peavine districts, Washoe County, Nevada
(University of Nevada, Reno, 1977)The geology and alteration of the Wedekind and part of the Peavine Districts were studied. Island arc rocks are intruded by Sierran granitic rocks and are overlain by magmatic arc volcanics. The Peavine and Wedekind Districts ... -
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Geology and geochemistry of the Broken Ridge area, southern Wah Wah Mountains, Iron County, Utah
(University of Nevada, Reno, 1985)The geology and geochemistry of the Broken Ridge area has been extensively studied and described in relation to tin-bearing rhyolitic lava flows. -
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Geology and hydrothermal alteration of a portion of the eastern Excelsior Mountains, Mineral County, Nevada
(University of Nevada, Reno, 1987)The eastern Excelsior Mountains are underlain by Permian, Triassic and Cretaceous volcaniclastic sedimentary rocks and porphyry stocks that are unconformably overlain by Tertiary ash-flow tuff, andesite lava flows, and ... -
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Geology and mineralization of the Granite Creek area, eastern Alaska Range, Alaska
(University of Nevada, Reno, 1981)The geology and mineralization of the Granite Creek Area of the Eastern Alaska Range have been studied. Pennsylvanian hypabyssal volcanic dacite porphyry is the basal geologic unit in the area. Low-grade porphyry copper ... -
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Geology and ore deposits of Sand Springs district, Churchill County, Nevada
(University of Nevada, Reno, 1980)The geology and structure of the Sand Springs mining district is studied and described. -
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Geology and tungsten mineralization of a portion of the Ragged Top mining district, Pershing County, Nevada
(University of Nevada, Reno, 1980)The area surrounding Ragged Top Mine in south –central Pershing County, Nevada, is underlain by Late Triassic-Jurassic sediments which are intruded by a Cretaceous granodiorite pluton. Tertiary volcanics overlie both the ... -
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Geology of part of the Cucomungo area, Esmeralda County, Nevada
(University of Nevada, Reno, 1980)The geology of a porphyry molybdenum prospect in southern Esmeralda County, Nevada is researched and described. -
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Geology of part of the Hilltop district, Lander County, Nevada
(University of Nevada, Reno, 1984)The Hilltop district is underlain by a thick sequence of western facies eugeosynclinal siliceous sedimentary and volcanic rocks of the Ordovician Valmy Formation within the upper plate of the Roberts Mountains allochthon. -
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Geology of the Buckskin mine, Douglas County, Nevada
(University of Nevada, Reno, 1987)The Buckskin Mine, developed on a quartz-chlorite-sulfide-gold vein, is hosted by altered meta-andesite and rhyolite porphyry. The vein may have formed in Late Cretaceous time. -
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Geology of the Corral Canyon area, Churchill County, Nevada
(University of Nevada, Reno, 1955)The geology and mineralization of Corral Canyon were studied. Low-grade titanium deposits occur in dikes which cut diorite. Alteration of the diorite and dikes is extensive. Gold was deposited in some dikes. -
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Geology of the eastern portion of the Indian Wells Canyon mining district, Kern County, California
(University of Nevada, Reno, 1981)Metamorphic and metasomatic alteration of fine grained Mesozoic carbonate sediments by a late Cretaceous granodiorite has produced a series of small calc-silicate skarns, most containing tungsten mineralization, in the ... -
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Geology of the Wild Horse Canyon area, Fox Range, Washoe County, Nevada
(University of Nevada, Reno, 1977)The geology of the Wild Horse Canyon area was studied and is described in this thesis. -
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Geology, alteration and mineralization of a copper-rich porphyry molybdenum stockwork system at Alum Creek, Summitville caldera, southeastern San Juan Mountains, Colorado
(University of Nevada, Reno, 1992)The geology, alteration and mineralization of a copper-rich porphyry molybdenum stockwork system at Alum Creek have been studied. -
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Geology, alteration, and mineralization at Hasbrouck Mountain, Divide district, Esmeralda County, Nevada
(University of Nevada, Reno, 1985)The geology, alteration, and mineralization at Hasbrouck Mountain were studied. -
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Geology, alteration, and mineralization in the pyroclastic and sedimentary deposits of the Bretz-Aurora Basin, McDermitt Caldera, Nevada-Oregon
(University of Nevada, Reno, 1981)Miocene to Pliocene age sediments in the Bretz-Aurora basin, 16 miles west of McDermitt, Nevada, form as a series of blanketing phreatomagmatic and plinian, ash and lapilli, subaerial and subaqueous deposits. Epithermal ...