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Crystal Gold Mine

Past Producer in Alaska, United States with commodities Gold, Copper
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Geologic information

Identification information

Deposit ID 10002400
MRDS ID A013318
Record type Site
Current site name Crystal Gold Mine
Alternate or previous names Daisy Belle
Related records 10160840

Geographic coordinates

Geographic coordinates: -133.79253, 57.96808 (WGS84)
Elevation 259
Relative position 2.3 MI. SW OF SENTINAL PT.
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • USBM OFR 85-86, FIG. 4, LOC. 155: LOCATION DESCRIBED IS 0.5 MI. E OF LOCATION FOR CRYSTAL MINE SHOWN ON SUMDUM (D-6) TOPO MAP. ALSO USGS MF-425, LOC. 1. 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
Copper Tertiary

Comments on the commodity information

  • GOLD OCCURRED AS SMALL CRYSTALS ON FACES OF PYRITE CUBES

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Gangue
Quartz Gangue

Analytical data

Result AVERAGE OF 45 SAMPLES: 0.29 TOZ/ST AU. PYRITE SAMPLE FROM VEIN: 6.46 TOZ/ST AU. USBM OFR 85-86, P. 47, LOC. 155.

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Amphibolite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Metamorphic Rock > Amphibolite

Nearby scientific data

(1) -133.79253, 57.96808
ListMap

Ore body information

  • General form LENS
    Width 3.05M

Controls for ore emplacement

  • Fault

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1895
Discoverer Bernard Heinz
Year of first production 1899
Year of last production 1909

Mining district

District name Juneau

Land status

Ownership category National Forest

Comments on the production information

  • LARGE-SCALE MINING AND PRODUCTION 1900-1905, SMALL SCALE MINING 1905-1909, GOLD RECOVERED FROM CLEANUP WORK, 1910, 1915-1921

Workings at the site

  • Type of workings Surface
    Length 701.04M

Comments on the workings information

  • 5 OPEN ADITS AND 2,300 FT. OF UNDERGROUND WORKINGS. 4 ADITS CONNECTED BY WORKINGS AND STOPES. 5-STAMP MILL BUILT IN 1900. AFTER 1903, ORE WAS TRAMMED TO 20-STAMP MILL AT FRIDAY MINE. ADITS OPEN AS OF 1986.

Comments on development

  • MILL ERECTED 1900, UNDERGROUND WORKINGS STARTED. OPTIONED IN 1903 BY ALASKA SNETTISHAM GOLD MINING CO.. ORE EXHAUSTED ABOVE ADIT LEVEL IN 1905. SMALL-SCALE MINING BY HEINZ UNTIL 1909, WITH CLEAN-UP WORK IN 1910, 1915-1921.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013318

Bibliographic references

  • Deposit

    USBM OFR 85-86, P. 46-47, FIG. 4, LOC. 155 (1986)

  • Deposit

    USBM OFR 91-86, P. 5, TABLE 2 (1986)

  • Deposit

    USGS OF 78-698, P. 10-11 (1978)

  • Deposit

    USGS MF-425, LOC. 1 (1972)

  • Other Database

    USBM-OFR-85-86-FIG-4-155

  • Production

    USBM OFR 91-86, P. 5, 17, 22, 24, 29, 30, 32, 35; ALSO USBM OFR 85-86, P. 46, 47

General comments

Subject category Comment text
Deposit CRYSTAL VEIN IS 1-10 FT. WIDE, AVERAGE WIDTH 4 FT., FILLS LOW-ANGLE FAULT ZONE THAT CUTS AMPHIBOLITE. QUARTZ IN VEIN IS DISCONTINUOUS AND FORMS LARGE LENSOID MASSES UP TO A FEW HUNDRED FT. LONG. VEIN INCLUDES ABUNDANT ALTERED AND UNALTERED WALLROCK FRAGMENTS, AND MANY QUARTZ, AND CALCITE-LINED VUGS. PYRITE CUBES COMMON IN BOTH QUARTZ AND FRAGMENTS, WITH SMALL CRYSTALS OF GOLD ON PYRITE FACES. CHALCOPYRITE LOCALLY PRESENT. PYRITE ALSO PRESENT IN MASSES UP TO 6 IN. THICK AND 10 FT. LONG. ALTERED AMPHIBOLITE EXTENDS A FEW IN. TO FEW FT. FROM VEIN.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1987 Leonard, Kenneth R. (Huber, Donald F.) U.S. Geological Survey