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Fern Mine

Past Producer in Alaska, United States with commodities Gold, Lead, Tungsten, Arsenic
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Warning: This record lacks important information: bibliographic references, which we consider necessary for a comprehensive report.

Geologic information

Identification information

Deposit ID 10000518
MRDS ID A010712
Record type Site
Current site name Fern Mine
Alternate or previous names Anchorage

Geographic coordinates

Geographic coordinates: -149.24436, 61.82456 (WGS84)
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Lead Tertiary
Tungsten Tertiary
Arsenic Tertiary

Comments on the commodity information

  • NAGYAGITE IS SULPHOTEILYRIDE OF PB & AU. ONE MENTION OF TETRAHEDRITE.

Materials information

Materials Type of material
Galena Ore
Gold Ore
Nagyagite Ore
Scheelite Ore

Alteration

  • (Local) Wallrock Alteration Intense.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -149.24436, 61.82456
ListMap

Geologic structures

Type of structure Local
Structure description One Or More Faults Offset Vein.

Ore body information

  • General form TABULAR
    Thickness 5.18M
    Depth to top 0M

Controls for ore emplacement

  • Shoots Along Intersections Of Main And Smaller Veins.

Comments on the geologic information

  • LITTLE GEOLOGIC DATA

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1917
Year of first production 1922
Year of last production 1941

Mining district

District name Willow Creek District

Land status

Ownership category State

Comments on the production information

  • PRODUCTION "MORE THAN $1,000,000". IF HALF IS $20 GOLD AND HALF $35 GOLD, PRODUCTION AT LEAST 40,000 OZ AU. NO OTHER PRODUCTION DATA.

Workings at the site

  • Type of workings Underground
    Length 914.4M
    Overall depth 300M

Comments on development

  • A LITTLE PRODUCTION REPORTED AFTER WORLD WAR II, BUT DATES NOT GIVEN

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010712

General comments

Subject category Comment text
Deposit "VEIN" IS DESCRIBED AS SHEAR ZONE AS MUCH AS 17 FT WIDE MADE UP OF QUARTZ, GOUGE, AND ALTERED COMMINUTED QUARTZ DIORITE. ALSO CALLED "STRINGER ZONE" (WITH NO NOTABLY THICK QUARTZ LENSES).

Reporter information

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