Mary Ann Mine

Past Producer in Flathead county in Montana, United States with commodities Silver, Lead, Copper
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. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10019724
MRDS ID DC11277
Record type Site
Current site name Mary Ann Mine

Geographic coordinates

Geographic coordinates: -114.57793, 47.92155 (WGS84)
Elevation 1286
Relative position 1.75 MI SW OF BROWNS MEADOW PASS

Site location context

Political divisions (FIPS codes)

Flathead(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Kofford Ridge(quadrangle 1:24,000 scale)

Polson(quadrangle 1:100,000 scale)

Wallace(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Flathead(hydrologic unit)

Pend Oreille(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States Montana Flathead

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 025N 023W 17,16 Montana

Comments on the location information

  • 0.25 MI E OF FLATHEAD MINE

Commodities

Commodity Importance
Silver Primary
Lead Primary
Copper Tertiary

Materials information

Materials Type of material
Argentite Ore
Bornite Ore
Enargite Ore
Galena Ore
Alunite Gangue
Barite Gangue
Clay Gangue
Pyrite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name Hog Heaven Volcanics
    Rock description Hog Heaven Volcanics
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene

Nearby scientific data

(1) -114.57793, 47.92155

Economic information

Geologic structures

Type of structure Regional
Structure description Shroder Creek Fault; Elk Mountain Anticline. Both Trend Nw.
Type of structure Local
Structure description West-Trending Fractures, Porphyritic Latite Plug.

Ore body information

  • General form PODS, SHOOTS

Comments on the geologic information

  • TWO STAGES OF MINERALIZATION: FINE GRAINED QUARTZ AND PYRITE WERE FORMED DURING THE FIRST STAGE; THE ROCK WAS THEN FRACTURED, AND THE FRACTURES WERE HEALED, LARGELY BY VERY FINE GRAINED QUARTZ, BARITE AND SULFIDES. LATITE HAS A CELLULAR STRUCTURE RESULTING FROM LEACHING AND REPLACEMENT OF FELDSPAR PHENOCRYSTS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1930

Mining district

District name Hog Heaven District

Land status

Ownership category State

Workings at the site

  • Type of workings Underground
    Length 144.78M

Comments on the workings information

  • ONE ADIT WITH 125 FT WINZE. SOME STOPING IS EVIDENT

Reference information

Bibliographic references

  • Deposit

    JOHNS, W. M., ETAL, 1963 , GEOLOGIC INVESTIGATIONS IN THE KOOTENAI-FLATHEAD AREA, NORTHWEST MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY BULL. 36 , PLATE 4 .

  • Deposit

    JOHNS, W. M., 1970 , GEOLOGY AND MINERAL DEPOSITS OF LINCOLN AND FLATHEAD COUNTIES, MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY BULL. 79 , PP. 137 - 142 .

  • Deposit

    CONSV. DIV. COMP. DATE, 06-19-1970

General comments

Subject category Comment text
Deposit ORE BODIES DISCOVERED THUS FAR ARE SMALL DEPOSIT BELIEVED TO HAVE FORMED AT A SHALLOW DEPTH

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-JUN-1979 Rojstaczer, Stuart A. U.S. Geological Survey

Beyond USGS

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

External references