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  3. Mineral Resource Data System (MRDS)

Unnamed (on tributary to Dalzell Creek)

Occurrence in Alaska, United States with commodities Arsenic, Gold, Antimony
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10307876
Record type Site
Current site name Unnamed (on tributary to Dalzell Creek)

Geographic coordinates

Geographic coordinates: -153.25982, 62.23649 (WGS84)
Relative position This unnamed occurrence is located on a rugged north-facing spur of a tributary valley of Dalzell Creek at an elevation of 4,600 feet (1,402 m) in the SE1/4 sec. 24, T. 25 N., R. 22 W., of the Seward Meridian. The reporter sampled the site in 1988; at station no. 88BT177.

Site location context

Political divisions (FIPS codes)

Bethel(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

McGrath A-1(quadrangle 1:63,360 scale)

McGrath SE(quadrangle 1:100,000 scale)

McGrath(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Kuskokwim River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Arsenic Critical Primary
Gold Primary
Antimony Critical Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) None.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -153.25982, 62.23649
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This unnamed occurrence is a low sulfide-quartz vein that intrudes sandstone of the Lower Cretaceous Kahiltna Flysch (Bundtzen, Harris, and Gilbert, 1997). The vein strikes approximately N70E for a distance of about 110 meters, and averages about 0.5 meters wide. Disseminated arsenopyrite and pyrite comprise about 1 percent of the vein volume. One grab sample of the vein contained 1,600 ppm arsenic, 150 ppb gold, and 55 ppm antimony.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = The reporter investigated the site during a geological mapping program for the Alaska Division of Geological and Geophysical Surveys in 1988 (Bundtzen, Harris, and Gilbert, 1997). One grab sample of sulfide-bearing vein material contained 1,600 ppm arsenic, 150 ppb gold, and 55 ppm antimony.

Reference information

Comments on the references

  • Primary Reference = This description

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c).

Reporter information

Type Date Name Affiliation Comment
Reporter 09-DEC-98 T.K. Bundtzen Pacific Rim Geological Consulting

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.