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Yellowhorn

Prospect in Alaska, United States with commodities Gold, Silver, Lead
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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 10000703
MRDS ID A011336
Record type Site
Current site name Yellowhorn

Geographic coordinates

Geographic coordinates: -147.29082, 63.19657 (WGS84)
Relative position This prospect is at an elevation of about 3,900 feet on the north slope of Gold Hill, between Lucky Gulch and White Creek. The site is in sec. 12, T. 20 S., R. 2 E., of the Fairbanks Meridian. This location is accurate to within 1,000 feet.

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Mount Hayes SW(quadrangle 1:100,000 scale)

Healy(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Susitna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Secondary

Materials information

Materials Type of material
Galena Ore
Gold Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) There is a color anomaly associated with the prospect due to weathering of pyrite.

Mineral occurrence model information

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

Nearby scientific data

(1) -147.29082, 63.19657
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rock at this prospect is miceous schist of unknown age. Foliation strikes 58 SE and dips 18 N. The deposit is a 4-foot-wide shear zone consisting, from the top down, of a one-foot-wide quartz vein, with three feet of schist cut by small quartz seams, and quartz stringers. Most of the quartz is sugary and contains vugs lined with terminated crystals. Good values of gold were panned from the weathered material, but there was some indication that in the unweathered material, the gold was in the sulfides, rather than free-milling (Tuck, 1936).

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = Surface trenches and cuts, one short tunnel and one 60-foot tunnel that missed the lode.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Tuck, 1938

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Deposit Other Comments = Shear zones in this area having shallow northward dips are part of a thrust zone best exposed underground at the Denali Copper prospect (HE191).

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-00 D.L. Stevens Stevens Exploration Management Corporation

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.