Bedrock Creek

Occurrence in Alaska, United States with commodity Uranium

Geologic information

Identification information

Deposit ID 10001499
MRDS ID A012246
Record type Site
Current site name Bedrock Creek
Related records 10160377

Geographic coordinates

Geographic coordinates: -145.09877, 65.54974 (WGS84)
Relative position SEE LOCATION COMMENTS
(click for info)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • LOCATION OF CLAIMS IS ABOUT 100 YARDS EAST OF BEDROCK CREEK AND 50 YARDS UPSTREAM OF THE STEESE HIGHWAY BRIDGE.

Commodities

Commodity Importance
Uranium Primary

Comments on the commodity information

  • MOST RADIOACTIVE ROCK IN AREA CONTAINED 0.005% EU

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -145.09877, 65.54974

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Comments on exploration

  • Status = Inactive

Mining district

District name Circle

Comments on the workings information

  • CLAIMS LOCATED 100 YARDS EAST OF THE CREEK WERE ACTIVE IN 1976 - 1978. WORKINGS CONSISTED OF SURFACE TRENCHING OF A SLIGHTLY RADIOACTIVE ZONE OF IRON-STAINED SCHIST 0.5 TO 2 FEET WIDE BY 8 FEET LONG. THIS IRON-STAINED SCHIST GAVE A RADIOMETRIC READING OF ABOUT 0.05 MR/HR WHILE THE UNSTAINED SCHIST GAVE A READING OF 0.04 MR/HR (FREEMAN, 1963, P. 32).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012246
USGS Alaska Resource Data File ARDF CI004
USGS Mineral Resources Data System MRDS D002679
USGS Mineral Resources Data System MRDS A012254

Bibliographic references

  • Deposit

    Nelson, A. E., West, W. S., and Matzko, J. J., 1954, Reconnaissance for radioactive deposits in eastern Alaska, 1952: U.S. Geological Survey Circular 348, 21 p.

  • Deposit

    Freeman, V. L., 1963, Examination of uranium prospects, 1956: U.S. Geological Survey Bulletin 1155, p. 29-33.

  • Deposit

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

  • Deposit

    Overstreet, W. C., 1967, The geologic occurrence of monazite: U.S. Geological Survey Professional Paper 530, 327 p.

  • Deposit

    Cobb, E. H., 1972, Metallic mineral resources map of the Circle quadrangle, Alaska: U.S. Geological Survey Misc. Field Studies Map 391, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E. H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Circle quadrangle, Alaska: U. S. Geological Survey Open-File Report 76-633, 72 p.

  • Deposit

    Eberlein, G. D., Chapman, R. M., Foster, H. L., and Gassaway, J. S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open File Report 77-168D, 132 p.

  • Deposit

    Barker, J. C., 1979, Trace element study of the Circle mining district, Alaska: U.S. Bureau of Mines Open File Report 57-79, 74 p.

  • Deposit

    Menzie, W. D., Foster, H. L., Tripp, R.B., and Yeend, W. E., 1983, Mineral resource assessment of the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-170-B, 61 p., 1 sheet, 1:250,000.

  • Deposit

    Nokleberg, W. J., Bundtzen, T. K., Berg, H. C., Brew, D. A., Grybeck, D., Robinson, M. S., Smith, T. E., and Yeend, W., 1987, Significant metalliferous lode deposits and placer districts of Alaska: U.S. Geological Survey Bulletin 1786, 104 p.

  • Deposit

    Yeend, W. E., 1991, Gold placers of the Circle district, Alaska - past, present, and future: U.S. Geological Survey Bulletin 1943, 42 p.

  • Deposit

    ADGGS CLAIM MAP-CIRCLE QUAD, KX-50-99

  • Other Database

    BAG-OFR-83-170B-03

General comments

Subject category Comment text
Deposit COUNTRY ROCK IS DOMINANTLY PALEOZOIC AND (OR) PRECAMBRIAN YUKON-TANANA TERRANE QUARTZ-MICA SCHIST CONTAINING NUMEROUS DISCONTINOUS QUARTZ VEINS, INTRUDED BY LOWER TERTIARY GRANITE OF THE CIRCLE PLUTON. NELSON, WEST, AND MATZKO (1954) REPORTED 10% MONAZITE, 5% TOPAZ AND A SMALL AMOUNT OF SCHEELITE IN THE HEAVY-MINERAL FRACTION OF THE GRANITE BEDROCK. OTHER MINERALS PRESENT ARE PYRRHOTITE, GARNET, ILMENITE, ZIRCON, BIOTITE, TOPAZ AND MALACHITE. TWO OTHER SAMPLES FROM THE AREA ARE SLIGHTLY ANOMALOUS IN TUNGSTEN (2-3 PPM), FLUORINE (2300-2400 PPM), LEAD (11-25 PPM), AND ARSENIC (12-24 PPM) (NELSON AND OTHERS, 1954). CONCENTRATES FROM GRAVEL ON UPPER BEDROCK CREEK CONTAIN TIN AND TUNGSTEN (BARKER, 1979). FLUOROMETRIC TESTS INDICATED THE PRESENCE OF URANIUM IN SEVERAL MINERALS BUT NOT IN AMOUNTS TO BE OF ECONOMIC INTEREST. A SLIGHTLY RADIOACTIVE ZONE OF IRON-STAINED SCHIST 0.5 TO 2 FEET WIDE BY 8 FEET LONG WAS STAKED FOR URANIUM. THIS IRON-STAINED SCHIST GAVE A RADIOMETRIC READING
Deposit OF ABOUT 0.05 MR/HR WHILE THE UNSTAINED SCHIST GAVE A READING OF 0.04 MR/HR (FREEMAN, 1963, P. 32). WORK ON CLAIMS BETWEEN 1976 AND 1978 CONSISTED OF SURFACE TRENCHING ON THE SLIGHTLY RADIOACTIVE ZONE OF THE IRON-STAINED SCHIST. BEDROCK CREEK IS NOTED FOR ITS ABSENCE OF GOLD, EVEN THOUGH IT IS SURROUNDED BY GOLD-PRODUCING CREEKS SUCH AS INDEPENDENCE, MAMMOTH, CROOKED AND BOULDER CREEKS (YEEND, 1991, P. 31).
Deposit SITE OF LOCALIZED RADIOACTIVE ANOMALY; LOW GRADE AND SMALL SIZE; USGS OFR 83-170B, APPENDIX II, NO. 3 APPARENTLY NO POTENTIAL FOR URANIUM OF ECONOMIC IMPORTANCE.
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1986 Leonard, Kenneth R. (Elliott, R. L.) U.S. Geological Survey
Updater 01-MAY-1998 C.J. Freeman, J.R. Guidetti Schaefer, A.S. Clements Avalon Development Corporation