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Gold Hill

Prospect in Alaska, United States with commodities Silver, Gold, Antimony
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Geologic information

Identification information

Deposit ID 10001992
MRDS ID A012836
Record type Site
Current site name Gold Hill
Related records 10112134

Geographic coordinates

Geographic coordinates: -165.48189, 64.6065 (WGS84)
Relative position This prospect is on the crest of hill 206, locally called Gold Hill, on the west side of Snake River between its tributaries Monument and Thompson Creeks. The map location is near the center of section 21, T. 10 S., R. 34 W., Kateel River Meridian. It is locality 44 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Antimony Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Galena Ore
Gold Ore
Stibnite Ore
Albite Gangue
Quartz Gangue

Alteration

  • (Local) Sulfidation and silicification.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -165.48189, 64.6065
ListMap

Comments on the geologic information

  • 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.
  • Age = Mid-Cretaceous or younger; postdates regional metamorphism of the host rocks.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Nome

Comments on the workings information

  • 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.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012836
USGS Alaska Resource Data File ARDF NM197

Bibliographic references

  • Deposit

    Cathcart, S.H., 1922, Metalliferous lodes in southern Seward Peninsula: U.S. Geological Survey Bulletin 722, p. 163-261.

  • 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.

  • 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.

Comments on the references

  • Primary Reference = This report

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a).

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUL-00 Hawley, C.C. Hawley Resource Group
Reporter 10-JUL-00 Travis L. Hudson Hawley Resource Group