Unnamed (on Weather Ridge)

Occurrence in Alaska, United States with commodities Silver, Lead, Zinc, Gold, Copper

Geologic information

Identification information

Deposit ID 10002542
MRDS ID A013485
Record type Site
Current site name Unnamed (on Weather Ridge)

Geographic coordinates

Geographic coordinates: -161.40139, 65.4605 (WGS84)
Relative position This occurrence is at an elevation of about 1,450 feet at the southeast end of Weather Ridge. This site is in section 28, T. 1 N., R. 13 W., of the Kateel River Meridian. The location is accurate to within 0.3 mile radius. Cobb, 1972 (MF-389), location 11; Miller and Elliott (1969), sample location 34, figure 2.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Primary
Gold Secondary
Copper Secondary

Comments on the commodity information

  • Ore Material = argentiferous galena

Materials information

Materials Type of material
Silver Ore
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Galena Ore
Quartz Gangue
Tourmaline Gangue

Alteration

  • (Local) Quartz and tourmaline?

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -161.40139, 65.4605

Comments on the geologic information

  • Geologic Description = This occurrence is located adjacent to the mid-Cretaceous Quartz Creek pluton, a hook-shaped, quartz monzonite body. The pluton is surrounded by a N 15 W-trending alteration zone about 18 miles long and 2 to 5 miles wide. The alteration zone is in Jurassic-Cretaceous andesitic volcanic rocks and is marked by quartz veins and possibly tourmaline. Fine-grained dikes of varying composition cut the andesites near the pluton. Dikes near the Quartz Creek pluton are locally mineralized. At this occurrence, galena, sphalerite, and pyrite are disseminated in quartz veins cutting altered andesite. A sample of a sulfide-bearing quartz vein (Miller and Elliott, 1969, location 34) contained: 150 ppm Ag (4.35 ounces Ag per ton), greater than 2% Pb, greater than 1% Zn, trace Au, and 500 ppm Cu.
  • Age = Mid-Cretaceous or younger.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Fairhaven

Comments on the workings information

  • Workings / Exploration = The area was first identified and mapped by the U.S. Geological Survey in the late 1960's (Miller and Elliott, 1969). It subsequently has been examined by various exploration companies. In the mid 1970's an exploration program including some drilling was completed by Greatland Exploration, Anchorage, Alaska.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013485
USGS Alaska Resource Data File ARDF CA014

Bibliographic references

  • Deposit

    Miller, T.P., and Elliott, R.L., 1969, Metalliferous deposits near Granite Mountain, eastern Seward Peninsula, Alaska: U.S. Geological Survey Circular 614, 19 p.

  • Deposit

    Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Candle, Holy Cross, Norton Bay, Nulato, and Unalakleet quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-866, 102 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Candle Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-389, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Miller and Elliott, 1969

General comments

Subject category Comment text
Deposit Model Name = Sulfides in altered andesite.
Deposit Other Comments = This site is one of numerous occurrences of argentiferous galena, sphalerite, pyrite, and arsenopyrite in an 18-mile-long, 2- to 5-mile-wide altered zone in andesite surrounding the hook-shaped Quartz Creek quartz monzonite pluton. The alteration zone extends N 15 W across the drainage basins of Quartz Creek and the Kiwalik River.

Reporter information

Type Date Name Affiliation Comment
Reporter 12-JAN-00 Williams, Anita U.S. Geological Survey