Unnamed (North Marble Island)

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

Geologic information

Identification information

Deposit ID 10307815
Record type Site
Current site name Unnamed (North Marble Island)

Geographic coordinates

Geographic coordinates: -136.06308, 58.67173 (WGS84)
Relative position The prospect site is on North Marble Island in Glacier Bay about 3.5 miles southwest of Sandy Cove. The location is uncertain; MacKevett and others (1971) did not find Reed's (1938) or Rossman's (1963) locations. The island is only about 0.4 mile long and 0.2 mile wide, and the location is probably correct to about 0.10 mile. The occurrence is location number 50 of Cobb (1972).

Site location context

Political divisions (FIPS codes)

Hoonah-Angoon(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Fairweather C-1(quadrangle 1:63,360 scale)

Juneau NW(quadrangle 1:100,000 scale)

Mount Fairweather(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Glacier Bay(hydrologic unit)

Northern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Glacier Bay National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Iron Primary
Nickel Critical Primary
Zinc Critical Primary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Covellite Ore
Magnetite Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore

Nearby scientific data

(1) -136.06308, 58.67173

Economic information

Comments on the geologic information

  • Geologic Description = North Marble Island is underlain mainly by crystalline marble that is part of a major marble unit exposed on several islands in Glacier Bay. They include Willoughby, Francis, and Drake Islands as well as North and South Marble Islands. The carbonate-rich section is primarily Devonian in age (MacKevett and others, 1971; Brew and others, 1978). The age of metamorphism and mineralization is probably Cretaceous. Assuming that the area is underlain by the granitic batholith of Cretaceous age that characterizes this province. Small sulfide (chalcopyrite, covellite, magnetite, pyrite, pyrrhotite?, and/or sphalerite) pods, commonly associated with mafic dikes, are widely distributed throughout the province. On North Marble Island, sulfide pods as much as 1.5 ft wide and 15 feet long occur in marble near mafic dikes. The sulfides also occur on joint faces within the dikes (Reed, 1938, p. 69). A mass of sphalerite and magnetite at an unspecified contact (?) was reported by Rossman (1963, p. K51).
  • Age = Cretaceous

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Inactive

Mining district

District name Juneau

Comments on the workings information

  • Workings / Exploration = No workings. One claim reportedly located for nickel by S. H. Vevelstad before 1930. Burchard (1914, 1920), who investigated the area for the marble resource, reported mafic or lamprophyric dike rocks cutting marble.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Rossman, 1963 ( B 1121-K)

General comments

Subject category Comment text
Deposit Model Name = Distal hydrothermal replacement possibly related to subjacent granitic intrusions of Cretaceous age.
Deposit Other Comments = the site is in Glacier Bay National Park and Preserve.. The first known metallic prospect staked on the island was by S. H. Vevelstad before 1930, who reportedly staked it for nickel. Mr. Vevelstad was an experienced prospector, better known for his discoveries of nickel-copper deposits in the Bohemia Basin area in the Sitka quadrangle.

Reporter information

Type Date Name Affiliation Comment
Reporter 03-JAN-99 Hawley, C.C. Hawley Resource Group

Beyond USGS

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

Authoritative Alaska resources

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