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Shannon

Prospect in Alaska, United States with commodities Silver, Copper, Gold, Cobalt, 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. Alteration
  7. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10308703
Record type Site
Current site name Shannon

Geographic coordinates

Geographic coordinates: -136.35213, 59.36974 (WGS84)
Relative position This occurrence is at an elevation of 4,500 feet on the north slopes of Flower Mountain, approximately 1.3 miles, N39E from the summit. It is in the NE1/4, section 8, T. 29 S., R. 54 E. of the Copper River Meridian. It is shown as location M by Gilbert and Redman (1989) and number 16 on sheet 1 by Still and others (1991).

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)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Copper Primary
Gold Secondary
Cobalt Critical Secondary
Zinc Critical Secondary

Alteration

  • Skarn.

Mineral occurrence model information

Model code 59
USGS model code 18b
Deposit model name Skarn Cu
Mark3 model number 8

Nearby scientific data

(1) -136.35213, 59.36974
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = According to Still and others (1991), the Shannon prospect is a small iron-stained lens of grossularite garnet-sulfide-magnetite skarn discovered in 1987 by Merrill Palmer . Selected high-grade samples from this lens contained up to 0.068 ppm gold, 1.3 ppm silver, 600 ppm zinc, 3,400 ppm copper, and 245 ppm cobalt (Gilbert and others, 1991). The host rocks for this prospect are Paleozoic to early Mesozoic mafic volcanics and sediments near an apophysis of Cretaceous quartz diorite to granodiorite that extends to the northeast from Flower Mountain (MacKevett and others, 1974). The skarn and mineralization are probably related to this intrusive body, thus are probably Cretaceous.
  • Age = Probably Cretaceous based on the age of the nearby intrusive rocks (MacKevett and others, 1974).

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Probably inactive

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 = Copper skarn (Cox and Singer, 1986; model 18b).

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.