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Mount Washington Mine

Past Producer in Jefferson county in Montana, United States with commodities Silver, Gold, Lead, Copper, Zinc, Bismuth, Antimony, Arsenic
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Production statistics
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10071344
MRDS ID W014678
Record type Site
Current site name Mount Washington Mine
Related records 10245846

Geographic coordinates

Geographic coordinates: -112.14449, 46.35629 (WGS84)
Elevation 2048
Relative position ABOUT 8 KM WEST OF JEFFERSON CITY, MONTANA

Site location context

Political divisions (FIPS codes)

Jefferson(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Thompson(quadrangle 1:24,000 scale)

Butte North(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Missouri(hydrologic unit)

Upper Missouri(hydrologic accounting unit)

Missouri-Marias(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Helena-Lewis and Clark 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 Jefferson

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 007N 004W 17,18 Montana

Comments on the location information

  • UTM LOCATION OF MOUNT WASHINGTON SHAFT ; INFO FROM LAND.ST :(1950)

Commodities

Commodity Importance
Silver Primary
Gold Primary
Lead Primary
Copper Primary
Zinc Critical Secondary
Bismuth Critical Tertiary
Antimony Critical Tertiary
Arsenic Critical Tertiary

Materials information

Materials Type of material
Bismuth Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Sphalerite Ore
Tetrahedrite Ore
Chalcedony Gangue
Pyrite Gangue
Quartz Gangue
Tourmaline Gangue

Alteration

  • (Local) Extensive Alteration To Sericite

Analytical data

Result 0.06 OZ/TON AU, 7.4 OZ/TON AG, 4% PB, 0.15 % CU, 3.1% ZN. ORE FROM FROM CLARK WINZE BETWEEN 800 AND 1000 FT LEVEL AVG. 20 OZ/TON AG, 6% ZN, LESS PB.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Pliocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Quartz Latite
    Rock unit name Quartz Latite Dikes And Plugs;Boulder Batholith, Butte Quartz Monzonite;Elkhorn Mountain Volcanics
    Rock description Quartz Latite Dikes And Plugs;Boulder Batholith, Butte Quartz Monzonite;Elkhorn Mountain Volcanics
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff

Nearby scientific data

(1) -112.14449, 46.35629
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith, South - Trending Syncline In Elkhorn Mountains Volcanics
Type of structure Local
Structure description Quartz Latite Dikes And Plugs, Strong Fault Zone Called Big Fault Cuts Both Veins And Dike, Strike Faults Border Both Veins And Cross Them

Ore body information

  • General form IRREGULAR LENS-LIKE SHOOTS
    Strike N 80 W
    Dip ABOUT VERTICAL
    Length 900M
    Width 8M
    Depth to top 0M

Controls for ore emplacement

  • Bluebird-Mount Washington Shear Zone

Comments on the geologic information

  • QUARTZ LATITE DIKE THAT SPLITS VEIN PROBABLY CONNECTS AT EITHER END WITH TWO PLUGS OF QUARTZ LATITE THAT CUT THE SHEAR ZONE. DIKE AVERAGES 25 FT. THICK.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1891
Discoverer Kauf Brothers

Mining district

District name Colorado (Corbin-Wickes) District

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner L. H. And L. Mining Co.,
    Home office Grand Junction, Co.

Production statistics

  • Year 1951
    Period 1902-1951 0.15%
    Material CU
    Accuracy Accurate
    Description Cp_Grade: ^3.1 %
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Copper Copper 3wt-pct

Comments on the reserve resource information

  • TOTAL STOPED AREAS SHOWN ON MINE MAP TOTAL 180,000 ST ASSUMING AVERAGE VEIN THICKNESS OF 7 FT. TOTAL MINERALIZED ROCK ABOVE 1000 LEVEL IS 800,000 ST FOR AN AREA 1400 FT LONG BY 1000 FT DEEP BY 7 FT WIDE. ASSUMING 200,000 ST OF WASTE HAS BEEN REMOVED, AT LEAST 400,000 ST MINERALIZED GROUND SHOULD BE PRESENT. CUTOFF GRADE APPEARS TO HAVE BEEN ABOUT 4 TOZ/ST AG AND 3% PB. ASSUMED GRADE IS HALF THIS. DEEPER EXPLORATION, PARTICULARLY ON THE SHOOT ABOUT 400 FT. WEST OF THE HOMESTAKE SHAFT, MAY DISCOVER ADDITIONAL ORE BODIES.

Workings at the site

  • Type of workings Underground
    Length 4000M
    Overall depth 300M

Comments on the workings information

  • MINE IS DEVELOPED BY 1000 FT SHAFT (HOMESTAKE) AND 10 LEVELS, ALL ABOUT 100 FT APART. THE 8TH LEVEL IS OPENED TO THE SURFACE BY A 1900 FT CROSSCUT (DEER TUNNEL) IN A CANYON TO THE NE. (CAVED). IT WAS THE MAIN HAULAGEWAY FOR THE MINE. ANOTHER SHAFT TO EXPLORE S VEIN AND AN ADIT.

Comments on development

  • 6 CLAIMS: KEYSTONE, MOUNT WASHINGTON, MONONGAHELA, IRON MASK, HOMESTAKE, HANDY ANDY, 1 PLACER.

Reference information

Bibliographic references

  • Deposit

    MBMG BULL 16, P. 52, 109.

  • Deposit

    USGS BULL 842, P. 236-37.

  • Deposit

    USGS PP 428, P. 20, 40, 49, 69, 73, PL. 1.

  • Production

    MBMG BULL. 16

General comments

Subject category Comment text
Deposit ORE OCCURS IN A STRONG VEIN WHICH FOR MOST OF ITS LENGTH IS SPLIT BY A POST ORE QUARTZ LATITE DIKE. THE PART OF THE VEIN N OF THE DIKE HAS YIELDED THE MOST ORE. THE N VEIN IS AS MUCH AS 25 FT WIDE AND DIPS STEEPLY TO THE N, EXCEPT BETWEEN THE 200 AND 300 FT LEVEL WHERE IT DIPS STEEPY S, BELOW THE 500 FT LEVEL IT IS NEARLY VERTICAL. THE S VEIN AVERAGES 7 FT IN WIDTH BUT AT W END OF 800 LEVEL IT IS 45 FT WIDE
Deposit DEER TUNNEL IS PART OF THE BLIZZARD MINE CLAIMS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1976 Krohn, Douglas H. U.S. Geological Survey
Updater 01-AUG-1981 Wise, Kristine K. (Elliott, James E.) U.S. Geological Survey

Beyond USGS

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

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