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The Reef Titanium/Iron Occurrence

Occurrence in Lewis and Clark county in Montana, United States with commodities Iron, Titanium, Metal
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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. Land status
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10090792
MRDS ID D004260
Record type Site
Current site name The Reef Titanium/Iron Occurrence

Geographic coordinates

Geographic coordinates: -112.11617, 47.12712 (WGS84)
Elevation 1524
Relative position 28 MI. SE OF AUGUSTA

Site location context

Political divisions (FIPS codes)

Lewis and Clark(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Coburn Mountain(quadrangle 1:24,000 scale)

Dearborn River(quadrangle 1:100,000 scale)

Choteau(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Missouri-Dearborn(hydrologic unit)

Upper Missouri(hydrologic accounting unit)

Missouri-Marias(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Montana Lewis and Clark

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 016N 004W 21 Montana

Comments on the location information

  • ON E. FLANK OF THE RIDGE KNOWN AS THE REEF

Commodities

Commodity Importance
Iron Tertiary
Titanium, Metal Critical Tertiary

Materials information

Materials Type of material
Ilmenite Ore
Magnetite Ore
Chert Gangue
Feldspar Gangue
Quartz Gangue
Sphene Gangue
Zircon Gangue

Analytical data

Result MAGNETITE AND ILMENITE MAKE UP 95% OF DEPOSIT, OTHER MINERAL GRAINS 1%, CEMENT 4%

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Virgelle Sandstone
    Rock description Virgelle Sandstone
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -112.11617, 47.12712
ListMap

Economic information

Ore body information

  • General form TABULAR
    Thickness 2.44M
    Length 1609.3M

Comments on the geologic information

  • OCCURRENCE IS IN TOP OF VIRGELLE SANDSTONE

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Medium
Significant No

Land status

Ownership category Private

Reference information

Bibliographic references

  • Analytical Data

    SRC.REF: SCHMIDT, ROGER G., 1979, USGS BULL. 1441, P. 68

  • Deposit

    SCHMIDT, ROGER G., 1979, ROCKS AND MINERAL RESOURCES OF THE WOLF CREEK AREA, LEWIS AND CLARK AND CASCADE COUNTIES, MONTANA: USGS BULL. 1441, P. 6

  • Deposit

    1966 RECON R.G. SCHMIDT: BULL. 144

General comments

Subject category Comment text
Deposit BEDS ARE A DARK REDDISH-BROWN COLOR AND ARE FIRMLY CEMENTED

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1979 Starritt, Bruce C. U.S. Geological Survey

Beyond USGS

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

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