Rae

The Rae 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: Rae
Secondary: San Juan
Secondary: Jennings Group

Commodity

Primary: Gold
Secondary: Copper
Secondary: Lead

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: Shear zone is oxidized (Capps, 1915).

Rocks

Not available

Analytical Data

Not available

Materials

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

Comments

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Late Cretaceous or younger; shear zone cuts the Late Cretaceous Willow Creek Pluton.

Comment (Commodity): Ore Material = copper carbonates

Comment (Deposit): Other Comments = Capps (1915) reports the San Juan and Rae prospects separately, however because these prospects are very near one another, they are are often reported together as one. The San Juan prospect, contains the pegmatitic material with reported good assays, while the Rae prospect (part of the Jennings Group) has insufficient data about the vein.

Comment (Commodity): Ore Material = copper carbonates

Comment (Workings): Workings / Exploration = Explored primarily by open cuts. There is not enough data to prove or disprove the presence of valuable ore bodies in the vein cutting the gneissic quartz diorite, but pegmatitic rocks show encouraging assays indicating gold to be present (Capps, 1915).

Comment (Geology): Geologic Description = Fault or shear zone in gneissic quartz diorite contains clay or gouge with some quartz carrying free gold, chalcopyrite, pyrite, galena, and copper carbonates. Shear zone or fault is oxidized and is 8 to 18 inches thick. The zone strikes generally northeast and dips 43 N. Pegmatitic rocks with large crystals of quartz and feldspars containing gold reported nearby. Ore not similar to ore in the rest of the district (Capps, 1915).? the gneissic quartz diorite is part of the Willow Creek Pluton, a Late Cretaceous 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.

Comment (Reference): Primary Reference = Capps, 1915

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

References

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Anchorage quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-409, 1 sheet, scale 1:250,000.

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

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): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): Capps, S.R., 1914, Gold lodes and placers of the Willow Creek district: U.S. Geological Survey Bulletin 592, p. 245-272.

Reference (Deposit): Capps, S.R., 1915, The Willow Creek District, Alaska: U.S. Geological Survey Bulletin 607, 86 p.

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