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Wyoming Lode

Prospect in Alaska, United States with commodities Gold, Antimony, Arsenic, Mercury
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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 10001647
MRDS ID A012419
Record type Site
Current site name Wyoming Lode
Related records 10136871

Geographic coordinates

Geographic coordinates: -155.93607, 63.57335 (WGS84)
Relative position The Wyoming prospect is situated on a steep, north-facing spur overlooking the East Fork of Montana Creek and the Main Fork of Wyoming Creek at an elevation of 2,400 feet (731 m) in Section 22, T. 22 S., R. 15 E., of the Kateel River Meridian. The reporter investigated the prospect in 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 C-6(quadrangle 1:63,360 scale)

Medfra N(quadrangle 1:100,000 scale)

Medfra(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Antimony Critical Primary
Arsenic Critical Secondary
Mercury Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Cinnabar Ore
Gold Ore
Stibnite Ore
Quartz Gangue

Alteration

  • (Local) Stibnite oxidized to kermesite.

Mineral occurrence model information

Model code 180
USGS model code 27d
Deposit model name Simple Sb (veins, pods, etc)

Host and associated rocks

  • Host or associated Associated
    Rock type
    Stratigraphic age (youngest) Late Cretaceous
    Chronological age 71.2

Nearby scientific data

(1) Kmvi
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Wyoming Lode consists of three distinct quartz-sulfide-sulfosalt veins that strike North 65 degrees east and dip steeply to vertical. The vein swarm can be traced for about 450 feet (137 m) along the strike and have a collective width of about 200 feet (61 m). The southern-most and highest vein consists of disseminated stibnite and arsenopyrite in a quartz vein that ranges from 1 foot to 3 feet (0.3 to 0.9 m) thick. The northern-most veins, which range from 2 to 5 feet (0.6 to 1.5 m) thick, contain massive to disseminated pods of very coarse-grained, interlocking stibnite blades and euhedral quartz crystals to 9 inches (23 cm) long and uncommon arsenopyrite. Distinctly reddish kermesite, an oxidation product of stibnite, frequently covers the stibnite blades. The textural habitat of the Wyoming and Moose Jaw lode (MD019) 2 miles (3.2 km) to the southwest are quite similar, which suggests both lodes might be related (Bundtzen and others, 1997). Mertie (1936) described the Wyoming lode as a cinnabar-stibnite deposit. However, Bundtzen and others (1997) searched for but could not identify cinnabar in the vein system. ? All mineralized veins at the Wyoming Lode cut hornfels adjacent to the Cripple Creek Mountains pluton, about 0.5 miles (0.8 km) from the sediment-intrusive contact. The Wyoming Lode is inferred to be Late Cretaceous based on the 71.2 Ma isotopic age of the adjacent pluton (Bundtzen and others, 1997).? Five chip-channel samples taken across three of the mineralized veins by Bundtzen and others (1997) contained up to 652 ppb gold, 2,830 ppm arsenic, and 45.7 percent antimony, but no detectable mercury.
  • Age = The Wyoming Lode is inferred to be Late Cretaceous based on the 71.2 Ma isotopic age of the adjacent pluton (Bundtzen and others, 1997).
  • Age = Chron age is for the adjacent pluton.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Innoko

Comments on the production information

  • Production Notes = Very coarse stibnite blades have possible mineral speciman quality potential.

Comments on the workings information

  • Workings / Exploration = Surface pits and trenches have been excavated to explore the deposit. Five chip-channel samples collected by Bundtzen and others (1997) contain up to 652 ppb gold, 2,830 ppm arsenic, and 45.7 percent antimony. None of the samples contained detectable mercury.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Bundtzen and others, 1997

General comments

Subject category Comment text
Deposit Model Name = Simple stibnite deposits (Cox and Singer, 1986; model no. 27d)
Deposit Other Comments = See Moose Jaw Lode (MD019).

Reporter information

Type Date Name Affiliation Comment
Reporter 04-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.