Banzer

Prospect in Alaska, United States with commodities Gold, Copper, Lead, Zinc

Geologic information

Identification information

Deposit ID 10000364
MRDS ID A010430
Record type Site
Current site name Banzer

Geographic coordinates

Geographic coordinates: -146.54253, 60.80959 (WGS84)
Relative position The Banzer prospect is at an elevation of less than 100 feet, about 0.75 mile northeast of Graveyard Point at the mouth of Landlocked Bay. It is in the NW1/4 sec. 19, T. 12 S., R. 7 W., of the Copper River Meridian. The location of the site is accurate to within 2000 ft. This site is loc. C- 67 in Jansons and others (1964) and loc. 17 in Cobb (1972: MF-392).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Primary
Lead Primary
Zinc Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Pyrrhotite Ore
Calcite Gangue
Quartz Gangue

Mineral occurrence model information

Model code 90
USGS model code 24a
Deposit model name Massive sulfide, Cyprus
Mark3 model number 11

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock
    Rock unit name Orca Group
    Rock description Orca Group
    Stratigraphic age (youngest) Eocene

Nearby scientific data

(1) -146.54253, 60.80959

Comments on the geologic information

  • Geologic Description = The Banzer prospect consists of sulfide-bearing quartz-calcite veins and of irregular clumps and stringers of sulfides in mafic volcanic rocks of the Tertiary Orca Group (Nelson and others, 1985; Cobb, 1979: OF 79-973). Sulfides reportedly include chalcopyrite, galena, pyrite, and pyrrhotite.? Capps and Johnson (1915) reported that there were two shafts and more than 200 feet of stripping completed by 1912. Assays of ore yielded values of 2.42 oz. Au/ton. The prospect could not be located in the early 1980s but assays of two grab samples of float from the general area of the prospect contained 0.08 ppm to 0.22 ppm Au, 0.1 ppm to 6.9 ppm Ag, and 22 ppm to 0.24% Cu (Jansons and others, 1984).
  • Age = Probably Tertiary based on the age of the host rock.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Copper River

Comments on the workings information

  • Workings / Exploration = Capps and Johnson (1915) reported that there were two shafts and more than 200 feet of stripping completed by 1912. Assays of ore yielded values of 2.42 oz. Au/ton. The prospect could not be located in the early 1980s but assays of two grab samples of float from the general area of the prospect contained 0.08 ppm to 0.22 ppm Au, 0.1 ppm to 6.9 ppm Ag, and 22 ppm to 0.24% Cu (Jansons and others, 1984).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010430
USGS Alaska Resource Data File ARDF CV024

Bibliographic references

  • Deposit

    Capps, S.R., and Johnson, B.L., 1915, The Ellamar district, Alaska: U.S. Geological Survey Bulletin 605, 125 p.

  • Deposit

    Crowe, D.E., Nelson, S.W., Brown, P.E., Shanks III, W.C., and Valley, J.W., 1992, Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks, Prince William Sound, south-central Alaska: Economic Geology, v. 87, p. 1722-1746.

  • Deposit

    Crowe, D.E., Nelson, S.W., Brown, P.E., Shanks III, W.C., and Valley, J.W., 1993, Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks, Prince William Sound, south-central Alaska-A reply: Economic Geology, v. 88, p. 1285-1288.

  • Deposit

    Sainsbury, C.L., 1993, Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks, Prince William Sound, south-central Alaska, A discussion: Economic Geology, v. 88, p. 1284-1285.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Cordova quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-392, 1 sheet, scale 1:250,000.

  • Deposit

    Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Cordova quadragle, Alaska: U.S. Geological Survey Open-file Report OF 79-973, 73 p.

Comments on the references

  • Primary Reference = Jansons and others, 1984

General comments

Subject category Comment text
Deposit Model Name = Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Deposit Other Comments = Crowe and others (1992; 1993) and Sainsbury (1993) discuss the genesis of the volcanogenic massive sulfide deposits in this area.? Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-00 S.W. Nelson U.S. Geological Survey