1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Silver Lining

Prospect in Alaska, United States with commodities Silver, Gold, Copper, Lead, Arsenic, Antimony, Zinc
Map
XML
JSON
KML
C
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. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10308378
Record type Site
Current site name Silver Lining

Geographic coordinates

Geographic coordinates: -142.29265, 63.63974 (WGS84)
Relative position The Silver Lining prospect is located approximately 42 road miles northeast of Tok in the north-central Tanacross (C-3) quadrangle. The prospect is located at the 30-mile marker of the Taylor Highway, at an elevation of 3000 to 3500 feet on the southwest flank of Mt. Fairplay, within T. 22 N., R. 16 E., of the Copper River Meridian (Curt Freeman, unpublished data, 1992). The location is accurate to within 1 to 2 miles.

Site location context

Political divisions (FIPS codes)

Southeast Fairbanks(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tanacross C-3(quadrangle 1:63,360 scale)

Tanacross NW(quadrangle 1:100,000 scale)

Tanacross C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary
Lead Primary
Arsenic Critical Secondary
Antimony Critical Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Azurite Ore
Chalcopyrite Ore
Chrysocolla Ore
Galena Ore
Malachite Ore
Stibiconite Ore
Chalcophanite Ore
Scorodite Ore
Clay Gangue
Limonite Gangue
Quartz Gangue

Alteration

  • (Local) Host syenite is altered to clay and cut by quartz-clay fractures.

Nearby scientific data

(1) -142.29265, 63.63974
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Silver Lining prospect is the Mt. Fairplay biotite syenite which is flanked to the west by Tertiary mafic volcanic rocks and to the east by biotite-quartz gneiss and schist (Foster, 1970). The Mt. Fairplay syenite has a K/Ar date of 67 +/- 2 Ma (Wilson and others, 1985). The prospect is notable for north-northeast linear structures. The mineralization consists of gold, silver, copper, arsenic, lead, zinc, and antimony mineralization hosted by quartz-clay altered shear zones in the biotite syenite. Minerals found include arsenopyrite, chalcopyrite, and galena. The mineralization is controlled by northeast-trending structures that cross-cut a strong northwest joint fabric. Rock samples contain up to 0.255 ounces per ton gold, 62 ounces per ton silver, 6.4 percent copper, and 4.7 percent lead (Curt Freeman, unpublished data, 1992). The regional geology consists of Upper Proterozoic to Lower Paleozoic polymetamorphic rocks ranging from biotite-quartz gneiss to quartz-muscovite-garnet schist (Foster, 1970). This basement assemblage is intruded by numerous intermediate Mesozoic to Tertiary intrusions and is capped by Tertiary mafic and felsic volcanic rocks (Foster, 1970).
  • Age = Tertiary or younger.

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Active

Mining district

District name Fortymile

Comments on the workings information

  • Workings / Exploration = Minor surface rock sampling.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = This description

Reporter information

Type Date Name Affiliation Comment
Reporter 13-APR-99 Cameron, C.E. Alaska Division of Geological and Geophysical Surveys

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.