Rim Rock Deposit

Occurrence in Madison county in Montana, United States with commodities Mica, Feldspar
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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10094791
MRDS ID DC08996
Record type Site
Current site name Rim Rock Deposit

Geographic coordinates

Geographic coordinates: -111.76835, 45.17102 (WGS84)
Elevation 1737
Relative position 4.25 MILES SOUTH OF VARNEY

Site location context

Political divisions (FIPS codes)

Madison(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Varney(quadrangle 1:24,000 scale)

Ennis(quadrangle 1:100,000 scale)

Bozeman(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Madison(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management MT)

Bureau of Land Management MT BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Montana Madison

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 008S 001W 06 Montana

Comments on the location information

  • PROSPECT LOCATED ON SOUTH SLOPE OF KNOLL OVERLOOKING DIRT ROAD.

Commodities

Commodity Importance
Mica Primary
Feldspar Tertiary

Materials information

Materials Type of material
Muscovite Ore
Actinolite Gangue
Garnet Gangue
Tourmaline Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble
    Rock unit name Dolomitic Marble Contact
    Rock description Dolomitic Marble Contact

Nearby scientific data

(1) -111.76835, 45.17102

Economic information

Ore body information

  • General form LENSES
    Strike N55E
    Dip STEEP NW
    Thickness 21.34M
    Length 65.53M

Controls for ore emplacement

  • Contact Zone Of Pegmatite Dike And Precambrian Dolomitic Marble

Comments on the geologic information

  • ORE OF PEGMATITE IS MILKY, MASSIVE QUARTZ

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic
Significant No
Discovery year 1941
Discoverer E, Vetter, Ennis

Comments on the workings information

  • TWO PROSPECT PITS

Reference information

Bibliographic references

  • Deposit

    HEINRICH, H, 1948, DEPOSITS OF THE SILLIMONITE GROUP OF MINERALS SOUTH OF ENNIS, MADISON CO., MONT. BUR. OF MINES AND GEOL., MISC CONT. 10, P. 8.

  • Deposit

    HEINRICH, H., 1949, PEGMATITE MINERAL DEPOSITS IN MONT., MONT. BUR. OF MINES & GEOL, MEM. 28, P. 14.

  • Deposit

    STOLL, 1950, MICA AND BERYL PEGMATITES, IDAHO & MONT, USGS PROF PAP. 229, P 59-61.

  • Deposit

    CONSV. DIV. COMP. DATE, 04-13-1961

  • Deposit

    1948 COMPILE MBMG. MISC. CONT. 10

  • Deposit

    1949 COMPILE MBMG, MEM. 28

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-MAR-1980 Doyle, Brien (Wells, John) U.S. Geological Survey

Beyond USGS

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