Lookout Mountain

Prospect in Alaska, United States with commodities Silver, Lead, Zinc, Copper, Tin
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. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10000692
MRDS ID A011320
Record type Site
Current site name Lookout Mountain

Geographic coordinates

Geographic coordinates: -149.57282, 63.22152 (WGS84)
Relative position This prospect is at an elevation of about 2,700 feet on the southeast flank of Lookout Mountain, approximately 0.4 mile south-southeast of the top of the mountain. This site is located in sec. 36, T. 19 S., R. 10 W., of the Fairbanks Meridian. The location is accurate within 1,000 feet. This is locality 13 of Cobb (1978: OFR 78-1062).

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-6(quadrangle 1:63,360 scale)

Healy S(quadrangle 1:100,000 scale)

Healy(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chulitna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary
Copper Secondary
Tin Critical Secondary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Quartz Gangue

Alteration

  • (Local) Minor sericitic-phyllic reported.

Mineral occurrence model information

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

Host and associated rocks

  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Argillite
  • Host or associated Host
    Rock type Plutonic Rock > Porphyry

Nearby scientific data

(1) -149.57282, 63.22152

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks in the prospect area are Upper Jurassic to Upper Triassic crystal tuff, argillite, graywacke and chert (Wilson and others, 1998). The strata are intruded by Upper Cretaceous or Lower Tertiary quartz porphyry and felsite. The deposit consists of argentiferous galena and sphalerite along fractures in a shear zone, in pipe breccias, and as disseminations in quartz porphyry. Scattered outcrops suggest that the quartz porphyry and felsite underlie an area about 1200 feet in diameter. Sulfides also are reported in breccia zones both in the intrusive and bedded rocks (Hawley and Clark, 1974). The breccias at Lookout Mountain are similar to those at the Golden Zone mine (HE043), but differ from then in containing more silver, lead, zinc, and tin.
  • Age = Late Cretaceous or younger, assuming that the deposit is related to the quartz porphyry and felsite.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Active

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = Limited surface work and sampling has been carried out on this prospect. The area has been covered by regional and detailed geophysical surveys.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Hawley and Clark, 1974

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 07-APR-2000 N. Van Wyck Stevens Exploration Management Corporation

Beyond USGS

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

Authoritative Alaska resources

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