Crystal Gold Mine

The Crystal Gold Mine is a gold mine located in Alaska at an elevation of 850 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Crystal Gold Mine
Secondary: Daisy Belle

Commodity

Primary: Gold
Tertiary: Copper

Location

State: Alaska
District: Juneau

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Type: Surface

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1899
Year Last Production: 1909
Discovery Year: 1895
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Form: LENS

Structure

Not available

Alterations

Not available

Rocks

Name: Amphibolite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Analytical Data

Analytical Data: 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.

Materials

Ore: Chalcopyrite
Ore: Gold
Gangue: Pyrite
Gangue: Quartz

Comments

Comment (Location): 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).

Comment (Workings): 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.

Comment (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.

Comment (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.

Comment (Production): LARGE-SCALE MINING AND PRODUCTION 1900-1905, SMALL SCALE MINING 1905-1909, GOLD RECOVERED FROM CLEANUP WORK, 1910, 1915-1921

Comment (Commodity): GOLD OCCURRED AS SMALL CRYSTALS ON FACES OF PYRITE CUBES

References

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

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

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

Reference (Deposit): USGS MF-425, LOC. 1 (1972)

Reference (Other Database): USBM-OFR-85-86-FIG-4-155

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

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