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Hanging Glacier

Prospect in Alaska, United States with commodities Silver, Gold, Barium-Barite, Copper, Lead, Zinc
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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. Mineral occurrence model information
  8. Host and associated rocks
  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 10002193
MRDS ID A013091
Record type Site
Current site name Hanging Glacier
Related records 10209788

Geographic coordinates

Geographic coordinates: -136.42214, 59.38974 (WGS84)
Relative position This prospect occurs between an elevation of 5,100 and 5,700 feet above a small unnamed hanging glacier that is about 1/2 mile northwest of the Saksaia Glacier. The approximate center of the prospect is near the west-central edge of section 1, T. 29 S., R. 53 E. of the Copper River Meridian. It is shown in figure 7 of Still (1984 [OF 118-84]).

Site location context

Political divisions (FIPS codes)

Haines(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Skagway B-4(quadrangle 1:63,360 scale)

Skagway SE(quadrangle 1:100,000 scale)

Skagway C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chilkat-Skagway Rivers(hydrologic unit)

Northern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Barium-Barite Critical Primary
Copper Primary
Lead Primary
Zinc Critical Primary

Materials information

Materials Type of material
Barite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Sphalerite Ore

Mineral occurrence model information

Model code 184
USGS model code 28a
Deposit model name Massive sulfide, kuroko
Mark3 model number 93
Model code 91
USGS model code 24b
Deposit model name Massive sulfide, Besshi (Japanese deposits)
Mark3 model number 30

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Metamorphic Rock > Schist > Greenschist
    Rock unit name Glacier Creek Volcanic Sequence;Glacier Creek Volcanic Sequence
    Rock description Glacier Creek Volcanic Sequence;Glacier Creek Volcanic Sequence

Nearby scientific data

(1) -136.42214, 59.38974
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = According to Still (1984 [OF 118-84]) and Still and others (1991), this prospect is an iron-stained zone of metasediments and hydrothermally altered metabasalt several hundred feet thick and about 2,000 feet long that strikes northeast and dips steeply north. The mineralization consists of barite lenses up to several feet thick and quartz-calcite ladder veins up to 0.5 feet thick. Both lenses and veins contain barite, pyrite, sphalerite, galena, and minor chalcopyrite. Samples from the lenses and veins contain up to 54% Ba, 14.1% zinc, 0.035% copper, 0.37% lead, 19.36 ppm silver, and 0.244 ppm gold. MacKevett and others (1974) note that the ladder veins occur within a 4- to 8-foot-thick altered dike that cuts the metavolcanic rocks. The ladder veins are as much as 6 inches thick and contain quartz, calcite, sphalerite, galena and minor chalcopyrite. They describe the barite lenses as a baritic footwall vein that contains fairly abundant galena and minor pyrite, sphalerite, and chalcopyrite.? Sampling by Rubicon Minerals (1998) indicated values of up to 18.25% zinc, 0.11% copper, 0.05% lead, 0.49 ppm gold, and 36.2 ppm silver. Rubicon considers the Hanging Glacier prospect to be a volcanogenic massive-sulfide system that may be stratigraphically higher relative to the Cap (SK060) and Nunatak (SK058) prospects or, alternatively, a structural repetition of the Cap-Nunatak horizon (Rubicon Minerals, 1998). The Hanging Glacier prospect and other similar prospects in the Mt. Henry Clay area are probably correlative with the Windy Craggy deposit in Canada and the Greens Creek deposit on Admiralty Island and are therefore Late Triassic (Still, 1984 [OF 118-84]; Newberry and others, 1997).
  • Age = The Hanging Glacier prospect and other similar prospects in the Mt. Henry Clay area are probably correlative with the Windy Craggy deposit in Canada and the Greens Creek deposit on Admiralty Island and are therefore Late Triassic (Still, 1984 [OFR 118-84]; Newberry and others, 1997).

Economic information about the deposit and operations

Development status Prospect
Commodity type Both

Comments on exploration

  • Status = Active

Mining district

District name Juneau (Skagway subdistrict)

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Still and others, 1991

General comments

Subject category Comment text
Deposit Model Name = Probably a volcanogenic massive-sulfide deposit with associated veining, some of which may be due to remobilization during deformation and metamorphism (Cox and Singer, 1986; models 28a or 24b).

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-2001 T.C. Crafford T. Crafford & Associates

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.