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Epithermal Gold Deposits Goldfield Gold District, Esmeralda and Nye Counties NV For Sale
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Epithermal Gold Deposits Goldfield Gold District, Esmeralda and Nye Counties NV:
$7.95
Epithermal Gold Deposits-Part I The Goldfield Gold District, Esmeralda and Nye Counties, NevadaU.S. Geological SURVEY Bulletin 1857
GEOLOGY AND RESOURCES OF GOLDTechnical publication from USGSThe Tonopah Precious-metal District, Esmeralda and Nye Counties, Nevada
The Republic Gold District, Ferry County, Washington
The Comstock Lode Precious-metal District, Washoe and Storey Counties, NevadThe Goldfield district is an epithermal precious metal
deposit of the quartz-alunite type. Gold ore bodies are
assoc1ated spatially and temporally with a calc-alkalic volcanic
center of early Miocene age Flows, tuffs, and breccias
of this center overlap a small caldera of Oligocene age Silicic
domes of Oligocene age and porphyritic rhyodacite domes
of early Miocene age both intrude the caldera ring-fracture
zone. Most of the rocks in and around the caldera are
hydrothermally altered, and gold ore bodies are clustered
along the caldera margin, hosted both by Oligocene rocks
cut by the ring-fracture zone and Miocene rocks that intrude
or overlie the ring-fracture zone. The ore bodies formed at
relatively shallow depths from meteoric water at about 200 to
300°C.The district has produced more than 4.2 million ounces
(130 metric tons) of gold and 1.45 million ounces (45 metric
tons) of sliver, mostly before World War I, and has modest
reserves and inferred resources of gold Minor intermittent
production continues.
Epithermal Gold Deposits Goldfield Gold District, Esmeralda and Nye Counties NV $7.95
USGS CARLIN and EPITHERMAL DISSEMINATED GOLD DEPOSITS Classic Early Report 1986 $25.00
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