Eagle River Mine

Past Producer in Alaska, United States with commodities Gold, Lead, Copper, Zinc

Geologic information

Identification information

Deposit ID 10001286
MRDS ID A012017
Record type Site
Current site name Eagle River Mine
Alternate or previous names Amalga
Related records 10282475

Geographic coordinates

Geographic coordinates: -134.77731, 58.57336 (WGS84)
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • COORDINATES GIVEN FOR "OLD MINE" WORKINGS 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
Lead Tertiary
Copper Tertiary
Zinc Tertiary

Comments on the commodity information

  • 90% OF GOLD WAS FREE MILLING, HIGHEST TENOR ASSOCIATED WITH ARSENOPYRITE AND GALENA

Materials information

Materials Type of material
Chalcopyrite Ore
Copper Ore
Galena Ore
Sphalerite Ore
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue

Analytical data

Result SEE PRODUCTION DATA

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate

Nearby scientific data

(1) -134.77731, 58.57336

Geologic structures

Type of structure Local
Structure description Ore Bodies Cut Off And Offset By Numerous Faults

Ore body information

  • Strike N 30 W
    Dip 50 NE
    Plunge 30

Comments on the geologic information

  • DEPOSIT IS IN SHEAR ZONE IN SLATE COUNTRY ROCK CONTAINING THIN SHEETS OF MAFIC INTRUSIVE ROCK DESCRIBED AS AN AUGITE MELAPHYRE; COUNTRY ROCK STIKES N 30-45 W, DIPS 60 NE TO 90, AVE. 70

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1902
Discoverer L.O. Sandstone; Neil Ward
Year of first production 1903
Year of last production 1916

Mining district

District name Juneau/Eagle River

Land status

Ownership category State

Production statistics

  • Year 1916
    Period 1903-1916
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 14g/mt

Comments on the production information

  • PRICE OF GOLD ABOUT $20.67/FINE OZ

Workings at the site

  • Type of workings Underground
    Length 9966.96M

Comments on the workings information

  • OLD MINE WORKINGS, DRIVEN BEFORE 1911: 30,000 FT OF UNDERGROUND WORKINGS ON 10 LEVELS; NEW ADIT 1800 FT LONG DRIVEN 700 FT BELOW OLD WORKINGS 1911-1912; NEW ADIT KNOWN AS "FLUME ADIT"; TOTAL DEVELOPMENT IN NEWER WORKINGS: 2700 FT AT MINE CLOSING; 20 STAMP MILL CONNECTED TO MINE BY TRAMWAY; CURRENT CONDITIONS UNKNOWN

Comments on development

  • MINING IN ORIGINAL DEVELOPMENT TUNNELS 1903-1910; NEW ADIT DRIVEN 1911-1912 AFTER LODE WAS LOST; MINING FROM NEW ADIT 1914-1916; CONSOLIDATED WITH EARLY MCWILLIAMS PROPERTY IN 1916; SOME EXPLORATORY WORK DONE IN 1933

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012017

Bibliographic references

  • Deposit

    USGS BULL 287, P. 130-131

  • Deposit

    USGS BULL 284, P. 35

  • Deposit

    USGS BULL 502, P. 44-46, PLATE 2, LOC. 12

  • Deposit

    USGS BULL 622, P. 101

  • Deposit

    USGS BULL 642, P. 76-77

  • Deposit

    USBM BULL 153, P. 23

  • Deposit

    USGS BULL 662, P. 77

  • Deposit

    USGS OFR 85-717, P. 139

  • Deposit

    USGS OFR 85-572, P. 167, NO. 59

  • Deposit

    STONE, DAVID AND STONE, BRENDA, 1983, HARD ROCK GOLD, THE STORY OF THE GREAT MINES THAT WERE THE HEARTBEAT OF JUNEAU: SEATTLE, WA, VANGUARD PRESS INC., P. 87

  • Other Database

    BAG-OFR-85-717-126

  • Production

    LINE 15: USGS BULL 1246, P. 158; LINE 16: STONE AND STONE, 1983, P. 87

General comments

Subject category Comment text
Deposit QUARTZ VEINS IN SHEAR ZONE CONTAIN ORE SHOOTS 5 TO 15 FT WIDE, 25-100 FT LONG; VEINS TERMINATE ON FAULTS; SULFIDES ARE PYRITE, PYRRHOTITE, ARSENOPYRITE, GALENA, SPHALERITE, CHALCOPYRITE; SOME NATIVE CU REPORTED
Deposit SEE ALSO: REX, JULIA GROUP; DISTORTION OF COUNTRY ROCKS DUE TO GRAVITY SLUMPING AND SURFACE CREEP IS PREVALENT IN THE MINE AREA; SOME DIFFICULTY WAS ENCOUNTERED IN KEEPING ADITS OPEN AND MANY CAVED DURING MINING PERIOD ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1985 Leonard, Kenneth R. (Elliott, R. L.) U.S. Geological Survey