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Hyder Skookum

Prospect in Alaska, United States with commodity Copper
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10308778
MRDS ID A010235
Record type Site
Current site name Hyder Skookum
Related records 10210070, 10000198

Geographic coordinates

Geographic coordinates: -130.03775, 56.01077 (WGS84)
Relative position 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.

Site location context

Political divisions (FIPS codes)

Prince of Wales-Hyder(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bradfield Canal A-1(quadrangle 1:63,360 scale)

Bradfield Canal SE(quadrangle 1:100,000 scale)

Bradfield Canal(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Southern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore
Calcite Gangue
Quartz Gangue

Alteration

  • Greenstone country rock and fragments of country rocks in breccias are partly replaced by sulfides.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -130.03775, 56.01077
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = 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 but are mostly barren of sulfides.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Hyder

Comments on the workings information

  • Workings / Exploration = Deposit was explored by an open cut, probably in the 1920's.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Buddington, 1929

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins

Reporter information

Type Date Name Affiliation Comment
Reporter 17-MAY-1998 H. C. Berg U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.