Crest

The Crest is a gold, copper, and lead 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: Crest

Commodity

Primary: Gold
Primary: Copper
Primary: Lead

Location

State: Alaska
District: Hyder

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: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Granodiorite country rock adjacent to veins is impregnated with sulfides.

Rocks

Not available

Analytical Data

Not available

Materials

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

Comments

Comment (Workings): Workings / Exploration = Prospect was explored in 1920's by open cuts and stripping.? Some sulfide-bearing quartz stringers assayed as high as 5 oz Au per ton, but most are much leaner.

Comment (Exploration): Status = Inactive

Comment (Geology): Geologic Description = The country rock in the area of the Crest prospect is the Triassic Texas Creek Granodiorite, which underlies and locally intrudes pelitic metasedimentary and subordinate andesitic (greenstone) strata of the Jurassic or older Mesozoic Hazelton Group (Smith, 1977; Koch, 1996).? the deposit (Buddington, 1929, p. 81-82) is in a thin but persistent fissure zone in granodiorite that has been traced for about 350 feet in opencuts and strippings. The zone contains quartz veins or stringers as much as 3 feet in aggregate thickness that contain shoots of relatively massive galena, accompanied by pyrite and a little chalcopyrite. The granodiorite country rock adjacent to the veins is impregnated with pyrite, which also occurs with galena on fracture surfaces. Some small quartz stringers assayed as much as 5 oz Au per ton, but most are much leaner.

Comment (Deposit): Other Comments = Property probably originally staked in early 1920's.? the Crest(?) claims staked in 1978(?) are not on the old Crest property (Elliott and Koch, 1981, loc. 72).

Comment (Deposit): Model Name = Polymetallic veins

Comment (Reference): Primary Reference = Buddington, 1929

References

Reference (Deposit): Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p.

Reference (Deposit): Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p.

Reference (Deposit): Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.

Reference (Deposit): Koch, R.D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-A, 35 p., 1 sheet, scale 1:250,000.

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