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Lucky Boy Extension

Prospect in Alaska, United States with commodities Copper, Lead, Zinc, Tungsten
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Geologic information

Identification information

Deposit ID 10001543
MRDS ID A012290
Record type Site
Current site name Lucky Boy Extension
Alternate or previous names Bear, Adenac

Geographic coordinates

Geographic coordinates: -130.04786, 55.98366 (WGS84)
Relative position The Lucky Boy Extension prospect is at an elevation of about 650-750 feet on the north bank of Adenac Creek. The site also includes the Bear claim and Adenac prospect. The site is in section 11, T. 68 S., R. 99 E., of the Copper River Meridian. It corresponds to loc. 2 on plate 2 in Buddington (1929 [B 807]); to loc. 2 on plate 7 and to plate 13 in Byers and Sainsbury (1956); to loc. 8 in Elliott and others (1978); and to loc. 427 on fig. 66 in Maas and others (1995). The location is accurate within about 0.2 mile.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Lead Primary
Zinc Primary
Tungsten Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Pyrrhotite Ore
Scheelite Ore
Sphalerite 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 Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -130.04786, 55.98366
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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 is a quartz fissure vein and stringer lode, 6-16 inches thick, in a 2-3 foot shear zone in silicified(?) Hazelton slate (Buddington, 1929, p. 67; Cobb and Elliott, 1980, p. 69). The quartz contains pyrite, galena, and sphalerite, and traces of pyrrhotite and chalcopyrite. Byers and Sainsbury (1956, p. 140) report rare grains of scheelite, presumably in the quartz veins, at the Bear (Lucky Boy Extension) prospect. Buddington (1929, p. 67) describes about 100 feet of underground workings on the Lucky Boy Extension. Maas and others (1995, p. 262) report about 300 feet of underground workings on the Adanac vein, which they traced on the surface for about 150 feet.? Maas and others (1995, p. 254) suggest that the sulfide-bearing quartz fissure veins at the Adanac prospect are Eocene in age. If so, the age of the deposit is roughly contemporaneous with the emplacement of the Hyder Quartz Monzonite batholith.
  • Age = Maas and others (1995, p. 254) suggest that the sulfide-bearing quartz fissure veins at the Adanac prospect are Eocene in age. If so, the age of the deposit is roughly contemporaneous with the emplacement of the Hyder Quartz Monzonite batholith.

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 Adenac prospect was explored in the early 1900s by about 300 feet of underground workings (Maas and others, 1995, p. 262). Samples collected by the U.S. Bureau of Mines in the early 1990s contained as much as 5.9 ppm Au, 605.1 ppm Ag, 1.61% Pb, and 1.75% Zn.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012290
USGS Alaska Resource Data File ARDF KC008

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

    Byers, F.M., and Sainsbury, C.L., 1956, Tungsten deposits of the Hyder district, Alaska: U.S. Geological Survey Bulletin 1024-F, p. 123-140.

  • 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); Cobb and Elliott, 1980

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c)
Deposit Other Comments = Includes references to Lucky Bay (Cobb and Elliott, 1980, p. 69).

Reporter information

Type Date Name Affiliation Comment
Reporter 29-JUN-99 H.C. Berg U.S. Geological Survey