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East Vein

Prospect in Alaska, United States with commodities Silver, Gold, Copper, Lead, Zinc
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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 10000684
MRDS ID A011309
Record type Site
Current site name East Vein

Geographic coordinates

Geographic coordinates: -149.64589, 63.21569 (WGS84)
Relative position The East Vein prospect is at an elevation of about 3,400 feet in and adjacent to Bryn Mawr Creek. The site is in sec. 3, T. 20 S., R. 11 W., of the Fairbanks Meridian. The location is accurate to within 400 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-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
Gold Primary
Copper Primary
Lead Primary
Zinc Critical Primary

Materials information

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

Alteration

  • (Local) The alteration is probably similar to that described for the adjacent Golden Zone and BLT, which consists of sericite, ankerite and quartz.

Mineral occurrence model information

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

Nearby scientific data

(1) -149.64589, 63.21569
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks at the East Vein prospect are hornfelsed Triassic red-bed sedimentary strata. The depositis a quartz stringer lode that strikes N30E, dips steeply to the northwest, and has a strike length of over 1,000 feet. The lode ranges from 1 to 3 feet wide and contains discontinuous pods of arsenopyrite, chalcopyrite, galena, pyrite, and sphalerite. In Bryn Mawr Creek the vein contains up to 80% sulfides. Inplaces, the vein is in gradational contact with country rock. Sulfide composition varies over short distances from arsenopyrite-rich to galena-sphalerite-rich zones. Vein samples assayed 0.01-0.90 ounce of gold per ton, 1.2-8.5 ounces of silver per ton, 0.15-0.73% copper, up to 1.8% lead, and up to 17% zinc (Mulligan and others, 1967). The East Vein prospect is about 500 feet east-northeast of the Golden Zone mine (HE043), and probably is an extension of that deposit.
  • Age = Probably Late Cretaceous.

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 = All surface exploration. Vein samples assayed 0.01-0.90 ounce of gold per ton, 1.2-8.5 ounces of silver per ton, 0.15-0.73% copper, up to 1.8% lead, and up to 17% zinc (Mulligan and others, 1967).

Reference information

Bibliographic references

  • Deposit

    Mulligan, J.J., Warfield, R.S., and Wells, R.R., 1967, Sampling a gold-copper deposit, Golden Zone Mine, south-central Alaska: U.S. Bureau of Mines Open-File Report 9-67, 59 p.

  • Deposit

    Hawley, C.C., and Clark, A.L., 1974, Geology and mineral deposits of the upper Chulitna district, Alaska: U.S. Geological Survey Professional Paper 758-B, p. 1-47, 2 sheets, scale 1:12,000 and 1:48,000.

  • Deposit

    Hawley, C.C., and others, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska. Contract No. JO166107: U.S. Bureau of Mines Open-File Report 24-78, 274 p., 12 sheets.

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.

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.