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Location: 47 km NW from Winnemucca, Nevada, United States
665 Anderson StreetWinnemuccaNevada, United States89445
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The Sleeper deposit is located on the western foothills of the Sleeper range, in NW Nevada. It consists of an epithermal Au-Ag vein system controlled by an extension-related system of NW, NS and bed-parallel structures affecting stratified rocks.Bed parallel structures related to the base of the rhyolite porphyry and the contact also act as control for Lower grade, disseminated mineralization. NW structures act as discontinuities for the main N-S veins, as well as hosts for lower grade mineralization.Four main types of gold mineralization are found within the Sleeper deposit and may represent a continuum as the system evolved from a high level, high sulphidation system dominated by intrusion related fluids and volatiles to a low sulphidation meteoric water dominant system (Corbett, 2005, Utterback, 2005, Histed, 2005). In this setting the paragenetic relationships of the differing mineralization styles are as follows: * Early - quartz-pyrite-marcasite stockwork* Intermediate - medium-grade, silica-pyrite marcasite cemented breccias localized on zones of structural weakness * Late - high-grade, banded, quartz-adularia-electrum-(sericite) veins* Post - alluvial gold-silver deposits in Pliocene gravels.
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