Three Hills Prospect, Esmeralda County, Nevada, USAi

Regional Level Types
Three Hills Prospect	Prospect
Esmeralda County	County
Nevada	State
USA	Country

Commodity: Ore Materials: gold Gangue Materials: quartz, adularia

Deposit: The property hosts oxidized, epithermal gold-silver mineralization. It explores a disseminated epithermal, quartz-adularia-type precious metal deposit in the vicinity of historic bonanza-type gold-silver deposits mined in the early 1900s. Exploration work by Eastfield has shown that several targets remain unexplored, including the Ohio, Bermuda and Merton veins. The Ohio vein was mined at plus 50-foot widths up to a fault, which offsets the zone; this offset presents an enticing drill target. Drilling by Eastfield along the surface projection of the Merton vein encountered 10 feet of 0.21 oz/t gold and 8 oz/t silver within an interval of 100 feet of anomalous gold in quartz-adularia stockworks. The main controls on the bonanza mineralization have been traced for approximately one mile west of the historic production and this area is largely unexplored.

Deposit type: Epithermal vein, Comstock

Development: The property was evaluated in 1991-93 at which time it was idle. A new phase of exploration on the property began in 1997. Eastfield owns (via direct ownership and agreement) a 100% interest in 25 patented claims. The Tonopah District, in which the property lies, was one of the preeminent silver producers in the U.S. In the first third of the 1900's 1.8 million oz. gold and 174 million oz. silver were mined at a recovered average grade of 0.21 oz/t gold and 19.7 oz/t silver. Exploration work by Eastfield has shown that several bonanza gold-silver targets remain unexplored, including the Ohio, Bermuda and Merton veins. The Ohio vein was mined at plus 50-foot widths up to a fault, which offsets the zone; this offset presenting a promising drill target. Drilling by Eastfield along the surface projection of the Merton vein encountered 10 feet of 0.21 oz/t gold and 8 oz/t silver within an interval of 100 feet of anomalous gold in quartz-adularia stockworks. the main controls on the bonanza mineralization have been traced for approximately one mile west of the historic production and this area is largely unexplored. In 2003, Vista Gold Corp. purchased both the Three Hills property in the Tonopah district the Hasbrouck property in the Divide district from Newmont Mining Corp. The Three Hills property is owned by Vista Gold Corp. (2004-2006). Vista also controls the Hasbrouck property a few miles south in the Divide District and reports on the two together as their ?Hasbrouck-Three Hills? project although the two deposits are separate and distinct and a few miles apart.

References

Other Databases

Link to USGS MRDS:	10310347