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Lemon

Prospect in Alaska, United States with commodities Copper, Zinc, Iron
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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 10308924
MRDS ID A011396
Record type Site
Current site name Lemon
Alternate or previous names Lemon claims, Copper King
Related records 10000756

Geographic coordinates

Geographic coordinates: -142.82254, 62.19669 (WGS84)
Relative position Best location: Richter and others, 1975, USGS MF-655K, loc. 23. Accurate to within 1000 ft. radius

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nabesna A-4(quadrangle 1:63,360 scale)

Nabesna SW(quadrangle 1:100,000 scale)

Nabesna C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

Wrangell-St. Elias National Preserve(National Preserve)

National Preserve NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Zinc Critical Primary
Iron Primary

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Magnetite Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Diopside Gangue
Epidote Gangue
Garnet Gangue
Gypsum Gangue
Magnetite Gangue
Molybdenite Gangue
Powellite Gangue
Tetrahedrite Gangue
Wollastonite Gangue

Alteration

  • Secondary minerals: molybdenite, chrysocolla, malachite, azurite, covellite.

Mineral occurrence model information

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

Nearby scientific data

(1) -142.82254, 62.19669
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Disseminated pyrrhotite, pyrite, and chalcopyrite in magnetite-rich skarn and veins of pyrite, chalcopyrite, and sphalerite in magnetite bodies and cutting skarn; some stringers of bornite and magnetite. Skarn developed in Permian limestone adjacent to Cretaceous quartz diorite intrusive and to porphyry Cu-Mo deposit at Orange Hill. Skarn grades outward into hornfels.
  • Age = Early Cretaceous

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chisana

Comments on the workings information

  • Workings / Exploration = Explored by short adits and diamond drilling. 188-foot core sample (Lemon Extension #2, Pilgrim, E.R., 1931) contained 0.3 TO 3.8 % Cu, average 0.95% Cu. Weighted averages from channel samples, Lemon Claim #2 (USGS OFR 76, p. 16) contained 0.71% Cu, 0.024 oz./t Au, 0.66 oz./t Ag. 8-foot channel sample from massive sulfide body 30 ft. long and 3 to 8 ft. thick (USGS OFR 76, p. 10, 11, table 2 no. 27) contained 0.32% Cu, 0.08 oz./t Au, 6.12% Zn, 38.84% Fe. Surface and underground workings.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit Model Name = Contact metasomatic, skarn
Deposit Other Comments = Considered as part of Orange Hill porphyry copper deposit. This listing contains data specific to contact metasomatic deposits associated with the quartz diorite at Orange Hill. See Orange Hill deposits (NB043).

Reporter information

Type Date Name Affiliation Comment
Reporter 28-JAN-1997 Leonard, K.R.; Elliott, R.L.; Nokleberg, W.J.; Richter, D.H. 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.