Charles

Occurrence in Alaska, United States with commodities Silver, Gold, Copper, Lead, Zinc

Geologic information

Identification information

Deposit ID 10000187
MRDS ID A010224
Record type Site
Current site name Charles
Alternate or previous names Nelson and Pitcher
Related records 10113114

Geographic coordinates

Geographic coordinates: -130.06981, 56.05366 (WGS84)
Relative position The approximate location of this ocurrence is in the southwest corner of Section 14 at an elevation of about 500 feet, astride the old tractor trail between Cantu Mountain and Mineral Hill (Elliott and Koch, 1981, p. 15, loc. 58). The location probably is accurate within about a quarter of a mile.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary
Lead Primary
Zinc Primary

Comments on the commodity information

  • Gangue = quartz porphyry

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Alteration

  • (Local) Silicification and sulfidization of granite porphyry

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46
Model code 54
USGS model code 17
Deposit model name Porphyry Cu (North America)
Mark3 model number 81

Nearby scientific data

(1) -130.06981, 56.05366

Comments on the geologic information

  • Geologic Description = The country rocks in the general area of this occurrence are pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group, which are underlain and locally intruded by the Triassic Texas Creek Granodiorite. The Hazelton and Texas Creek rocks are intruded by the Eocene Boundary Granodiorite, and all of these rocks in turn are cut by still-younger Tertiary lamprophyre dikes (Smith, 1973, 1977; Koch, 1996).? the deposit (Westgate, 1922, p. 129, 139-140) consists of sulfide minerals disseminated in sheared, silicified granite porphyry that is cut by small, barren quartz veins. The sulfides are sphalerite, galena, pyrite, and chalcopyrite. Assays reportedly showed small amounts of Au and Ag.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Hyder

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010224
USGS Alaska Resource Data File ARDF BC058

Bibliographic references

  • Deposit

    Westgate, L.G., 1922, Ore deposits of the Salmon River district, Portland Canal region: U.S. Geological Survey Bulletin 722, p. 117-140.

  • Deposit

    Smith, J.G., 1973, A Tertiary lamprophyre dike province in southeastern Alaska: Canadian Journal of Earth Sciences, v. 10, p. 408-420.

  • Deposit

    Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p.

  • Deposit

    Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.

  • Deposit

    Koch, R.D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-A, 35 p., 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Westgate, 1922

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins; ?Porphyry copper, North America(?)
Deposit Model Number = 22c; 17(?)

Reporter information

Type Date Name Affiliation Comment
Reporter 17-MAY-1998 H. C. Berg U.S. Geological Survey