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Stone

Prospect in Alaska, United States with commodities Silver, Gold, Bismuth
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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. 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 10094051
MRDS ID A012423
Record type Site
Current site name Stone
Alternate or previous names Stone Lode
Related records 10258697

Geographic coordinates

Geographic coordinates: -154.87988, 63.15254 (WGS84)
Relative position The Stone Lode prospect is located at an elevation of 1,250 feet (381 m) in Section 16, T. 27 S., R. 21 E., of the Kateel River Meridian. The reporter visited the site in 1989 and 1996.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Medfra A-4(quadrangle 1:63,360 scale)

Medfra S(quadrangle 1:100,000 scale)

Medfra C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Stony River(hydrologic unit)

Upper Kuskokwim River(hydrologic accounting unit)

Southwest(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
Gold Primary
Bismuth Critical Secondary

Materials information

Materials Type of material
Bismuth Ore
Chalcopyrite Ore
Gold Ore
Garnet Gangue
Magnetite Gangue

Alteration

  • (Local) Tactite.

Mineral occurrence model information

Model code 59
USGS model code 18b
Deposit model name Skarn Cu
Mark3 model number 8

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Monzonite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -154.87988, 63.15254
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Stone Lode prospect is a poorly known, but promising gold prospect in skarn near a limestone/monzonite contact; it is geologically very similar to Nixon Fork Mine (MD062). Mineralization consists of garnet-rich and wallastonite-idocrase-epidote skarn that replaces an Ordovician limestone near the margin of a small monzonite body that is currently undated.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Active

Mining district

District name McGrath

Comments on the production information

  • Production Notes = Some modest production activities in the form of test shipments of high grade ore by the owner may have taken place (Ted Almasy, personal communication, 1998).

Comments on the workings information

  • Workings / Exploration = Only surface workings have been completed at the Stone Lode prospect. No assay data are available.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Berg and Cobb, 1967

General comments

Subject category Comment text
Deposit Model Name = Copper-gold skarn (Cox and Singer, 1986; model no. 18b)
Deposit Other Comments = See Nixon Fork Mine (MD062). The Stone prospect is on in part on land selected or conveyed to Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave., Fairbanks, Alaska, 99701.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-JUN-98 Bundtzen, T.K. Pacific Rim Geological Consulting

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.