Blue Quartz Mining Co.

The Blue Quartz Mining Co. is a gold mine located in Alaska.

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

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Site Name

Primary: Blue Quartz Mining Co.

Commodity

Primary: Gold
Secondary: Copper

Location

State: Alaska
District: Willow Creek

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Low-sulfide Au-quartz vein

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Wall-rock alteration within a few inches of the veins is intense, but seldom extends more than 10 to 12 inches beyond the quartz filling. Sericitization and carbonate alteration predominate, but there is some pyritization and in the outer parts of the alteration zone chloritization is present (Ray, 1954).

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Gold
Ore: Pyrite
Ore: Tetrahedrite
Gangue: Orthoclase
Gangue: Quartz
Gangue: Tourmaline

Comments

Comment (Geology): Geologic Description = Chapin (1921) reported that three parallel granitic dikes cut tonalite country rock. The dikes are composed of quartz, orthoclase, and clusters of tourmaline. They strike N 63 E and one of these dikes, 8 ft wide, gradually passes along its strike into a quartz vein. The vein carries some gold and visible particles of chalcopyrite and tetrahedrite. Several short, intersecting gash veins of quartz intersect this main vein with considerable pyrite. These veins pinch out a short distance from the main fissure, but the persistence of the fissure vein is unknown. It appears to merge into a granite dike in one direction and is untracable due to debris (talus or glacial deposits ?) in the other direction.? the bedrock is the Late Cretaceous Willow Creek Pluton, a zoned pluton: the outer part consists of hornblende quartz diorite and lesser hornblende tonalite; the core consists of hornblende-biotite granodiorite, and lesser hornblende-biotite quartz monzodiorite and biotite quartz monzonite. Wall-rock alteration within a few inches of the veins is intense, but seldom extends more than 10 to 12 inches beyond the quartz filling. Sericitization and carbonate alteration predominate, but there is some pyritization and in the outer parts of the alteration zone chloritization is present (Ray, 1954).

Comment (Geology): Age = Late Cretaceous or younger; the dikes and veins cut the Late Cretaceous Willow Creek Pluton.

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)

References

Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.

Reference (Deposit): Chapin, Theodore, 1921, Lode developments in the Willow Creek district: U.S. Geological Survey Bulletin 714-E, p. 201-206.

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