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  3. Mineral Resource Data System (MRDS)

Tofty Area

Past Producer in Alaska, United States with commodities Gold, Tin, Silver, Niobium (Columbium), REE
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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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Land status
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10100950
MRDS ID A010745
Record type Site
Current site name Tofty Area
Alternate or previous names American Creek, Woodchopper Creek, Builder Creek, Patterson Creek, Cache Creek, Sullivan Creek
Related records 10111669

Geographic coordinates

Geographic coordinates: -150.88639, 65.0885 (WGS84)

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tanana A-2(quadrangle 1:63,360 scale)

Tanana SE(quadrangle 1:100,000 scale)

Tanana(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • A PRODUCTIVE PLACER AREA OF APPROXIMATELY 55 SQ. MI. LARGELY TO THE WEST OF THE GIVEN LOCATION. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Gold Primary
Tin Critical Secondary
Silver Secondary
Niobium (Columbium) Critical Tertiary
REE Critical Tertiary

Comments on the commodity information

  • CONCENTRATES WERE RELATIVELY ENRICHED IN MOBIUM AND RARE EARTH ELEMENTS, BUT THESE WERE NOT RECOVERED

Materials information

Materials Type of material
Cassiterite Ore
Gold Ore
Xenotime Ore

Nearby scientific data

(1) -150.88639, 65.0885
ListMap

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1906
Year of last production 1975

Mining district

District name Hot Springs

Land status

Ownership category State

Comments on the production information

  • THESE ARE VERY ROUGH ESTIMATES

Reference information

Bibliographic references

  • Deposit

    USGS B1374, P. 140-143

  • Deposit

    USGS OFR 1313A, P. 3,5,14,16,19,20

  • Production

    USGS OPEN FILE 1313A

General comments

Subject category Comment text
Deposit DEPOSITS LIE INBENCHES IN MAIN STREAMS AND IN RECONCENTRATES OF THESE BENCHES IN THE BEDS OF THEIR TRIBUTARIES. GOLD IN AMERICAN CREEK IS IN STREAM BED.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1984 Hirschmann, M. M. (Elliott, R. L.) U.S. Geological Survey

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.