Unnamed (at headwaters of Burro Creek)

Occurrence in Alaska, United States with commodities Silver, Copper

Geologic information

Identification information

Deposit ID 10002205
MRDS ID A013105
Record type Site
Current site name Unnamed (at headwaters of Burro Creek)

Geographic coordinates

Geographic coordinates: -135.47211, 59.47975 (WGS84)
Relative position This occurrence is at an elevation of 3,500 feet about 1.4 miles west of Parsons Peak in a saddle at the head of Burro Creek. It is in the south-central part of section 36, T. 27 S., R. 58 E. of the Copper River Meridian. It is shown as mineral occurrence 8 by Redman and others (1984) and as number S066 by Wells and others (1986).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite 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 > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) -135.47211, 59.47975

Comments on the geologic information

  • Geologic Description = According to Redman and others (1984), this occurrence consists of quartz vein float from the Burro Creek fault zone where it cuts biotite quartz monzonite of the Ferebee pluton at the head of Burro Creek. The quartz-vein float contains pyrite and chalcopyrite A sample contained 1,580 ppm copper, 50.5 ppm silver, 170 ppm lead, and 128 ppm molybdenum. The veins were found only as float along the fault trace. The mineralization must be younger than the Late Cretaceous to early Paleocene Ferebee pluton (Redman and others, 1984).
  • Age = Younger than Late Cretaceous based on the age of intrusive rocks cut by the Burro Creek fault (Redman and others, 1984).

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Juneau (Skagway subdistrict)

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013105
USGS Alaska Resource Data File ARDF SK022

Bibliographic references

  • Deposit

    Redman, E.C., Retherford, R.M., and Hickok, B.D., 1984, Geology and geochemistry of the Skagway B-2 Quadrangle, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 84-31, 34 p., 4 sheets, scale 1:40,000.

  • Deposit

    Wells, D.E., Pittman, T.L., Brew, D.A. and Douglass, S.L., 1986, Map and description of the mineral deposits in the Juneau, Taku River, Atlin, and part of the Skagway quadrangles, Alaska; U.S. Geological Survey Open-File Report 85-717, 332 p.

Comments on the references

  • Primary Reference = Redman and others, 1984

General comments

Subject category Comment text
Deposit Model Name = Quartz-sulfide vein (Cox and Singer, 1986; model 22c?).

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-2001 T.C. Crafford T. Crafford & Associates