McRoberts Creek

Occurrence in Alaska, United States with commodities Mercury, Tungsten

Geologic information

Identification information

Deposit ID 10009649
MRDS ID D002738
Record type Site
Current site name McRoberts Creek

Geographic coordinates

Geographic coordinates: -148.99266, 61.58956 (WGS84)
Relative position Along McRoberts Creek: Sec. 6, T. 17 N., R. 3 E., of the Seward Meridian. Accurate within 1 mile. Locality 74 and 75 of Jasper (1967) and locality 91 of Cobb (1972).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Mercury Primary
Tungsten Primary

Materials information

Materials Type of material
Cinnabar Ore
Magnetite Ore
Pyrite Ore
Scheelite Ore
Ilmenite Ore

Nearby scientific data

(1) -148.99266, 61.58956

Comments on the geologic information

  • Geologic Description = Jasper (1967) reported creek float consisting of granite, greenstone and ultramafic rocks. Concentrates include: magnetite, scheelite, pyrite, ilmenite, and a trace of cinnabar.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Anchorage

Comments on the workings information

  • Workings / Exploration = Pan concentrates contain 50 to 60 percent magnetite, less than 1 percent scheelite, about 1 percent pyrite, a few grains of ilmenite, and 1 grain of cinnabar (Jasper, 1967).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS D002738
USGS Alaska Resource Data File ARDF AN091

Bibliographic references

  • Deposit

    Jasper, M.W., 1967, Geochemical investigations along the Valdez to Chitina Highway, south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geochemical Report 15, 33 p.

  • Deposit

    Cobb, E.H., 1975, Tungsten occurrences in Alaska: U.S. Geological Survey Mineral Investigations Resource Map MR-66, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Anchorage quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-409, 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 Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.

Comments on the references

  • Primary Reference = Jasper, 1967

General comments

Subject category Comment text
Deposit Other Comments = It appears that McRoberts Creek has also been referred to as Bodenburg Creek and Palmer Creek on various maps.

Reporter information

Type Date Name Affiliation Comment
Reporter 30-JUL-1998 D.P. Bickerstaff U.S. Geological Survey
Reporter 30-JUL-1998 S.W. Huss U.S. Geological Survey