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Blackmore Prospect

Occurrence in Beaverhead county in Montana, United States with commodity Molybdenum
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10022673
MRDS ID FS00081
Record type Site
Current site name Blackmore Prospect
Related records 10147976

Geographic coordinates

Geographic coordinates: -112.99478, 45.42767 (WGS84)
Elevation 2652
Relative position CLAIM IS 11 MILES N OF DILLON MT. ON U.S. HGWY 91, THEN WESTWARD 22 MILES ON THE BIRCH CREEK ROAD.

Site location context

Political divisions (FIPS codes)

Beaverhead(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Torrey Mountain(quadrangle 1:24,000 scale)

Dillon(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Big Hole(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Beaverhead-Deerlodge National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Montana Beaverhead

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 005S 011W 05 Montana

Comments on the location information

  • 1500 FT. NW OF PEAR LAKE DAM.

Commodities

Commodity Importance
Molybdenum Primary

Comments on the commodity information

  • SAMPLES (3) TAKEN FROM NO. 1 CUT, OF 3 SAMPLES B - 3 WAS SENT FOR ASSAY CHECK (7/8 CUT ACROSS A 4.5 INCH QUARTZ VEIN).

Materials information

Materials Type of material
Molybdenite Ore

Analytical data

Result ASSAY REPORT: MO - 0.209% (1958) 2ND ASSAY REPORT 1959: MO - 0.543% NO. 2 SHAFT. NO. 11 CUT - MO - 0.742%

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Pioneer Batholith
    Rock description Pioneer Batholith
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) Granitic rock
ListMap

Economic information

Ore body information

  • General form IRREGULAR

Comments on the geologic information

  • MOST OF AREA IS COVERED BY GLACIAL MORAINE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1955
Discoverer Charles P. Mackenzie

Mining district

District name Pioneer Mountains

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Charles P. Mackenzie

Comments on the workings information

  • NO. 1 DISCOVERY SHAFT - 6 FEET BY 10 FEET BY 5 FEET DEEP, PARTLY SLOUGHED. {{ NO. 2 SHAFT - 12 FEET BY 12 FEET BY 6 FEET DEEP. {{ NO. 3 TRENCH - 3 FEET WIDE BY 3 FEET DEEP BY 12 FEET LONG, RUNS S 26 DEG. E IN SOIL AND ROCK DEBRIS, SLOUGHED. {{ NO. 4 PIT - 8 FEET BY 8 FEET BY 2 FEET DEEP, SLOUGHED. {{ NO. 5 PIT - 4 FEET DIAMETER BY 4 FEET DEEP IN SOIL AND GRANITE BOULDERS. {{ NO. 6 PIT - 7 FEET LONG BY 3 FEET WIDE BY 3 FEET DEEP, SLOUGHED, IN SOIL AND GRANITE BOULDERS. {{ NO. 7 PIT - 8 FEET LONG BY 2.5 FEET WIDE BY 2 FEET DEEP, IN SOIL. {{ NO. 11 CUT AND SHAFT IN GRANITE, SHOWS THREE SEPERATE QUARTZ VEINS. EACH VEIN STRIKES APPROXIMATELY N 70 DEG. E AND HAS A NEAR-VERTICAL DIP. THEY VARIED IN THICKNESS FROM 2 1/2 TO 5 INCHES. {{ NO. 12 CUT AND SHAFT - CUT RUNS N 75 DEG. W, 12 FEET LONG BY 5 FEET WIDE, 4 FEET DEEP. SHAFT IS 3 FEET BY 3 FEET BY 2 FEET DEEP AND PARTICALLY CAVED, IN SOIL.

Reference information

Bibliographic references

  • Deposit

    USBM RI 5552, P. 37

  • Deposit

    1958 DIREXPL USFS

  • Deposit

    1959 DIREXPL USFS

General comments

Subject category Comment text
Deposit SMALL MOLYBDENUM PROSPECT. VEINS ARE ALL LESS THAN 5 INCHES WIDE AND CONTAIN NO TUNGSTEN MINERALS (PATTEE, 1960) ; INFO.SRC : 1 PUB LIT
Deposit FLOAT AND THREE QUARTZ VEINS CONTAIN BLEBS OF MOLYBDENITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1975 Hunter, Marilyn D. U.S. Geological Survey
Updater 01-JUL-1980 Loen, Jeffrey S. (Pearson, Robert C.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site