The Gold Hill is a silver and gold mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Gold Hill MRDS details
Site Name
Primary: Gold Hill
Commodity
Primary: Silver
Primary: Gold
Secondary: Antimony
Location
State: Alaska
District: Nome
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Low-sulfide Au-quartz vein
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Sulfidation and silicification.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Galena
Ore: Gold
Ore: Stibnite
Gangue: Albite
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Mid-Cretaceous or younger; postdates regional metamorphism of the host rocks.
Comment (Reference): Primary Reference = This report
Comment (Workings): Workings / Exploration = Cathcart (1922) reported as much as about 0.17 ounce of gold per ton in narrow vein zones. Soil sampling, trenching, and drilling by Kennecott Exploration Co. in 1990 and 1991 found wide low-grade zones that appear to have been upgraded by secondary enrichment.
Comment (Geology): Geologic Description = The Gold Hill prospect is on a low bedrock hill tht is thinly covered by soil. Several subdued and sloughed prospect pits are near the crest of the hill, and another pit is on the southeast flank of the hill just above Snake River. Cathcart (1922, p. 247) described the deposits as thin quartz-feldspar veins and weathered sulfidized zones that panned free gold.? In 1990, Kennecott Exploration Company completed a soil geochemical survey over Gold Hill. The survey consisted of six north-trending lines 400 feet apart, along which soil samples were collected on 200-foot centers. The survey revealed extensive zones of high arsenic, moderate gold, and weak antimony geochemical anomalies. The soil survey was followed up by about 3,200 feet of roughly north-south trenching and by two diamond core holes, each about 350 feet deep (C.C. Hawley and Cindy Buxton, written communication, 1992). The trenching indicated that Gold Hill was crossed by about six lenticular east-northeast-trending mineralized zones as much as 80 feet wide. The best zone in the northern half of the easternmost trench contained 80 feet of material that assayed 280 to 2,540 ppb gold and 3,560 to more than 10,000 ppm arsenic. This zone is marked by sparse quartz boulders containing minor disseminated galena and by old prospect pits. The highest antimony values, 150 to 250 ppm, were in parts of the trench system having lower gold and arsenic values. Drill samples showed substantially lower values than those in samples from the trenches, suggesting that gold was enriched near the surface. The upper 50 feet of core hole GHDH-2 penetrated about 40 feet of rock averaging 0.01 ounce of gold per ton and 5 feet of rock containing 1,360 ppb gold. Core hole GHDH-1 penetrated nearly 80 feet of mineralized schist and quartz veins near the bottom of the hole but values were generally less than 100 ppb gold; the maximum value for a 3-foot mineralized zone within the 80-foot zone was 2,210 ppb Au.
Comment (Deposit): Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a).
References
Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.
Reference (Deposit): Cathcart, S.H., 1922, Metalliferous lodes in southern Seward Peninsula: U.S. Geological Survey Bulletin 722, p. 163-261.
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