Hyder Skookum

The Hyder Skookum is a copper 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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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: Hyder Skookum

Commodity

Primary: Copper

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: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Gangue: Pyrrhotite

Comments

Comment (Deposit): BUT ARE MOSTLY BARREN OF SULFIDES.

Comment (Deposit): THE COUNTRY ROCKS IN THE AREA OF THIS PROSPECT ARE PELITIC METASEDIMENTARY AND SUBORDINATE ANDESITIC (GREENSTONE) METAVOLCANIC STRATA OF THE JURASSIC OR OLDER MESOZOIC HAZELTON GROUP, WHICH IS UNDERLAIN AND LOCALLY INTRUDED BY THE TRIASSIC TEXAS CREEK GRANODIORITE (SMITH, 1977; KOCH, 1996). BUDDINGTON (1929, P. 72) DESCRIBES TWO TYPES OF DEPOSITS AT THIS SITE. ONE DEPOSIT IS A SULFIDE REPLACEMENT MASS IN SOMEWHAT SCHISTOSE GREENSTONE NEAR THE CONTACT OF A QUARTZ PORPHYRY DIKE. THE MASS CONSISTS OF PYRRHOTITE AND A LITTLE CHALCOPYRITE AND ARSENOPYRITE. SOME SULFIDES ALSO ARE DISSEMINATED IN QUARTZ IN THE SAME ZONE. THE OTHER TYPE OF DEPOSIT COMPRISES TWO PARALLEL QUARTZ VEINS UP TO 7 FEET THICK THAT LOCALLY FORM BRECCIAS WITH THE QUARTZ PORPHYRY OR GREENSTONE COUNTRY ROCKS. SOME OF THE COUNTRY ROCK FRAGMENTS IN THE BRECCIAS ARE IMPREGNATED WITH PYRITE AND A STRINGER IN THE GREENSTONE CARRIES A LITTLE DISSEMINATED SULFIDE. SURFACE EXPOSURES OF THE VEINS CARRY A LITTLE CALCITE

Comment (Location): THE HYDER SKOOKUM PROSPECT, IN SECTION 36 NEAR ITS SOUTHERN BOUNDARY, IS AT AN ELEVATION OF ABOUT 3150 FEET ON THE SOUTHEAST WALL OF SKOOKUM CREEK, AND ABOUT HUNDRED OR SO FEET ABOVE THE CREEK (ELLIOTT AND KOCH, 1981, P. 18, LOC. 76). THE LOCATION IS ACCURATE WITHIN ABOUT 0.2 MILE.

Comment (Exploration): Status = Inactive

Comment (Workings): DEPOSIT WAS EXPLORED BY AN OPEN CUT, PROBABLY IN THE 1920'S.

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 D1 and Bradfield Canal A-1 quadrangles, southeastern 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 81-728A, 35 p.,1 sheet, scale 1:250,000.

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