Unnamed

Prospect in Alaska, United States with commodities Molybdenum, Copper, Zinc

Geologic information

Identification information

Deposit ID 10001418
MRDS ID A012163
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -149.31972, 62.85764 (WGS84)
Relative position At W end of plateau bounded by Portage Creek, Devil's Canyon & Devil Creek; 2 3/4 mi (4.4 km) NE of confluence of Portage Creek & Susitna River; location accurate to within 1/4 mi (400 m) (Csejtey and Miller, 1978, loc. 8).
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Molybdenum Primary
Copper Secondary
Zinc Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Molybdenite Ore
Pyrite Ore
Sphalerite Ore
Fluorite Gangue
Quartz Gangue

Alteration

  • (Local) Silicification

Mineral occurrence model information

Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Nearby scientific data

(1) -149.31972, 62.85764

Comments on the geologic information

  • Geologic Description = Host rock is quartz monzonite of Cretaceous or Tertiary age. Silicified shear zones in quartz monzonite contain lenses, vugs, and masses of molybdenite crystals and other sulfides. Molybdenite mineralization appears related to quartz monzonite.
  • Age = Cretaceous or Tertiary

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = A bench cut and a short adit were opened. Analysis of channel samples showed up to 0.1% Mo and Zn (Richter, 1963).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012163
USGS Alaska Resource Data File ARDF TK011

Bibliographic references

  • Deposit

    Richter, D.H., 1963, Geology of the Portage Creek-Susitna River area, Alaska: Alaska Division of Mines and Minerals Geologic Report 3, 2 plates, scale 1:24,000.

  • Deposit

    Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-370, 1 sheet, scale 1:250,000.

  • Deposit

    Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and table describing metalliferous and selected nonmetalliferous mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-B, 20 p., 1 plate, scale 1:250,000.

  • Deposit

    Singer, D.A., Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and discussion of the metalliferous and selected nonmetalliferous mineral resources of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-588-Q, 33 p., 1 plate, scale 1:250,000.

  • Deposit

    Cobb, E.H., and Csejtey, Bela, Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-716, 63 p.

  • Deposit

    Smith, P.S., 1942, Occurrences of molybdenum in Alaska: U.S. Geological Survey Bulletin 926-C, p. 161-210.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = Richter, 1963

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu-Mo (Cox and Singer, 1986; model 21a)
Deposit Other Comments = Further exploration at this locality may be justified but would require heavy equipment or drilling due to poor surface exposure.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1996 Riehle, J. U.S. Geological Survey