Bishop

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

Geologic information

Identification information

Deposit ID 10001538
MRDS ID A012285
Record type Site
Current site name Bishop
Related records 10112377

Geographic coordinates

Geographic coordinates: -130.05369, 55.99171 (WGS84)
Relative position The Bishop prospect is on the west shoulder of Skookum Creek at about 1300 feet elevation. The site is in section 11, T. 68 S., R. 99 E., of the Copper River Meridian. It corresponds to loc. 3 on plate 2 in Buddington (1929 [B 807]), and to loc. 5 in Elliott and others (1978). The location is accurate within 0.1 mile.
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Secondary
Lead Secondary

Materials information

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

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Texas Creek Granodiorite
    Rock description Texas Creek Granodiorite
    Stratigraphic age (youngest) Early Jurassic
    Stratigraphic age (youngest) Early Jurassic
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -130.05369, 55.99171

Comments on the geologic information

  • Geologic Description = The country rocks in the area of this site include: pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or Triassic Hazelton Group; recrystallized granodiorite of the Triassic Texas Creek Granodiorite, which intrudes the Hazelton rocks; quartz monzonite and granodiorite of the Hyder Quartz Monzonite batholith, which intrudes the Hazelton and Texas Creek rocks; and Tertiary lamprophyre dikes, which intrude all of the foregoing rock units (Buddington, 1929; Smith, 1973, l977; Berg and others, 1988).? the deposit consists of a sulfide-bearing quartz fissure vein in (Texas Creek) granodiorite (Buddington, 1929, p. 67). The vein ranges in thickness from about 15 inches to 7 feet and was traced on the surface for 600 feet. It contains pyrrhotite and pyrite, a little chalcopyrite and galena, and traces of gold and silver. The vein was explored in the early 1900s by a 10-foot adit. Maas and others (1995, p. 254) suggest that sulfide-bearing quartz fissure veins in the Texas Creek Granodiorite in the Hyder district are Eocene in age.
  • Age = Maas and others (1995, p. 254) suggest that sulfide-bearing quartz fissure veins in Texas Creek granodiorite in the Hyder district are Eocene in age.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Mining district

District name Hyder

Comments on the workings information

  • Workings / Exploration = The deposit was explored in the early 1900s by a 10-foot adit.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012285
USGS Alaska Resource Data File ARDF KC005

Bibliographic references

  • Deposit

    Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p.

  • 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., Berg, H.C., and Karl, Susan, 1978, map and table describing metalliferous and selected nonmetalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-file Report, 78-73-B,17 p., scale 1:250,000.

  • Deposit

    Cobb, E.H., and Elliott, R.L., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-1053, 154 p.

  • Deposit

    Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.

  • Deposit

    Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.

Comments on the references

  • Primary Reference = Buddington, 1929 (B807)

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c)

Reporter information

Type Date Name Affiliation Comment
Reporter 28-JUN-1999 H.C. Berg U.S. Geological Survey