1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Pohndorf Mine

Past Producer in Jefferson county in Montana, United States with commodity Gemstone
Map
XML
JSON
KML
B
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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10010552
MRDS ID D004324
Record type Site
Current site name Pohndorf Mine

Geographic coordinates

Geographic coordinates: -112.35366, 45.86907 (WGS84)
Elevation 1902
Relative position 2 MILES NORTHEAST OF TOLL MOUNTAIN CAMPGROUND

Site location context

Political divisions (FIPS codes)

Jefferson(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Grace(quadrangle 1:24,000 scale)

Butte South(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Jefferson(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Montana Jefferson

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 001N 006W 4 Montana

Comments on the location information

  • SW/4 OF THE NE/4 OF SECTION 4

Commodities

Commodity Importance
Gemstone Primary

Materials information

Materials Type of material
Amethyst Ore
Albite Gangue
Apatite Gangue
Biotite Gangue
Magnetite Gangue
Microcline Gangue
Muscovite Gangue
Quartz Gangue
Sericite Gangue
Sphene Gangue
Tourmaline Gangue

Alteration

  • (Local) Corrosion

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    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
    Rock unit name Butte Quartz Monzonite
    Rock description Butte Quartz Monzonite

Nearby scientific data

(1) -112.35366, 45.86907
ListMap

Economic information

Ore body information

  • General form LENS
    Length 42.67M
    Width 16.76M

Controls for ore emplacement

  • Pegmatite

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Deposit size Small
Significant No

Mining district

District name Little Pipestone District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Montgomery And Over
    First year 1938

Comments on the workings information

  • THREE PITS WORKED THE WESTERN END OF THE DEPOSIT.

Comments on development

  • ECON.COM: AMETHYST IS NOT ABUNDANT, NOR IS ALL OF IT GEM QUALITY

Reference information

Bibliographic references

  • Deposit

    HEINRICH, E.W., 1949, PEGMATITE MINERAL DEPOSITS IN MONTANA: MONT. BUREAU OF MINES AND GEOLOGY MEMOIR 28, P 48-49

  • Deposit

    1949 RECON MBMG MEMOIR 2

General comments

Subject category Comment text
Deposit THE MINED BODY IS A VESICULAR TO VUGGY AGGREGATE OF MICROCLINE AND QUARTZ

Reporter information

Type Date Name Affiliation Comment
Reporter 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