Unnamed (headwaters of Quartz Creek)

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

Geologic information

Identification information

Deposit ID 10002541
MRDS ID A013484
Record type Site
Current site name Unnamed (headwaters of Quartz Creek)

Geographic coordinates

Geographic coordinates: -161.39333, 65.4894 (WGS84)
Relative position This occurrence is at an elevation of about 800 feet near the headwaters of Quartz Creek. The site is in section 25, T. 1 N., R. 13 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 10, and Miller and Elliott (1969), figure 2, sample locations 24, 25, and 26.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Primary
Copper Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Calcite Gangue
Quartz Gangue
Tourmaline Gangue

Alteration

  • (Local) Tourmaline and sericite alteration along closely spaced fractures; quartz-carbonate replacement.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Quartz Creek Pluton
    Rock description Quartz Creek Pluton
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) -161.39333, 65.4894

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 carbonate-quartz replacement, and tourmaline. Fine-grained dikes of varying composition cut the andesites near the pluton. Dikes near the Quartz Creek pluton are locally mineralized. This occurrence consists of a galena-bearing calcite vein 18 inches thick in altered quartz monzonite. The altered quartz monzonite consists of quartz-carbonate-sericite rock containing disseminated pyrite, arsenopyrite, galena, sphalerite, and tourmaline. A composite grab sample contained 44 ppm Ag, 2.25% Pb, and 4.67% Zn (Miller and Elliott, 1969).
  • Age = Late Cretaceous.

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 has been mapped and examined by the U.S. Geological Survey and by various exploration companies.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013484
USGS Alaska Resource Data File ARDF CA021

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., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 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 quartz monzonite.
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 zone of altered andesite surrounding the Quartz Creek quartz monzonite pluton. The altered zone trends N 15 W, across the drainage basins of Quartz Creek and the Kiwalik River, parallel to prominent lineaments in the area.

Reporter information

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