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Unnamed (west of Tsusena Creek)

Prospect in Alaska, United States with commodities Silver, Copper, Tin, Lead, Tungsten, 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. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10307562
Record type Site
Current site name Unnamed (west of Tsusena Creek)

Geographic coordinates

Geographic coordinates: -148.69178, 63.0126 (WGS84)
Relative position This prospect is at an elevation of about 4,000 feet, near the drainage divide between Tsusena and Portage creeks. The map site is about 2.2 miles south of peak 5896, in the NW1/4 of in sec. 15, T. 22 S., R. 6 W., of the Fairbanks Meridian. The location is accurate to within 1,000 feet. This is locality D6 of Balen (1990: OFR 34-90).

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-4(quadrangle 1:63,360 scale)

Healy S(quadrangle 1:100,000 scale)

Healy C(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
Silver Primary
Copper Primary
Tin Critical Primary
Lead Secondary
Tungsten Critical Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Cassiterite Ore
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Wolframite Ore
Quartz Gangue

Mineral occurrence model information

Model code 47
USGS model code 15b
Deposit model name Sn veins

Nearby scientific data

(1) -148.69178, 63.0126
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks in the area of this prospect are Upper Triassic calcareous shale, argillite, and siltstone cut by numerous dikes, sills, and plugs of altered diabase and gabbro. These rocks are overlain by Oligocene to Paleocene volcanic flows, and pyroclastic rocks, and intruded by diverse, Tertiary(?) hypabyssal plutons (Wilson and others, 1998). The deposit consists of tin- and silver-bearing quartz veins and a mineralized shear-zone. The ore minerals are cassiterite, chalcopyrite, galena, sphalerite, and wolframite. Samples of the deposit contained as much as 26.5 ounces of silver per ton, 0.55% tin, 1.2% lead, 5.4% zinc, and 0.66% copper (Balen, 1991).
  • Age = Early Tertiary.

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Probably inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = The deposit was explored in 1980-81 by detailed geological mapping and geophysical exploration, but the claims later were allowed to lapse (Balen, 1991).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Balen and others, 1991

General comments

Subject category Comment text
Deposit Model Name = Sn veins (Cox and Singer, 1986; 15b)

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-00 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.