Mackinaw Metals Mine

Past Producer in Snohomish county in Washington, United States with commodities Cobalt, Copper, Gold, Nickel, Silver, Uranium
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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Reserves and resources
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10155721
MRDS ID M025736
MAS/MILS ID 0530610008
Record type Site
Current site name Mackinaw Metals Mine
Alternate or previous names Mackinaw Group, Osceolo Claim, Lenox Claim, Lorna Claim, Banner Claim, Banner Extension Claim, Albion Claim, Blue Bell Claim, Mackinaw Claims 1 To 7, Mackinau Metals, Taft Copper Nickel Mine, Weden Creek, Donald Claim, St Lawrence Claim

Comments on the site names

  • THE MACKINAW GROUP CONSISTS OF 16 CLAIMS

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -121.44311, 47.98121 (WGS84)
Elevation 829
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Snohomish(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Monte Cristo(quadrangle 1:24,000 scale)

Skykomish River(quadrangle 1:100,000 scale)

Wenatchee(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Sauk(hydrologic unit)

Puget Sound(hydrologic accounting unit)

Puget Sound(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Mt. Baker-Snoqualmie 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 Washington Snohomish

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 029 N 011 E 19 SESW Washington

Commodities

Commodity Importance
Cobalt Critical Tertiary
Copper Primary
Gold Tertiary
Nickel Critical Tertiary
Silver Tertiary
Uranium Tertiary

Materials information

Materials Type of material
Calcite Unknown
Chalcopyrite Unknown
Chloanthite Unknown
Chrysocolla Unknown
Erythrite Unknown
Garnierite Unknown
Malachite Unknown
Pentlandite Unknown
Pyrite Unknown
Pyrrhotite Unknown
Quartz Unknown

Nearby scientific data

Main Entrance (1) -121.44311, 47.98121

Economic information

Ore body information

  • Field Value
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 IRREGULAR
    Type of Orebody #2 DISSEMINATED
    Type of Orebody #3 OTHER
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin OXIDATION
    Primary Ore Control FAULTING
    Secondary Ore Control CONTACT ZONE
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 ADV ARGILLIC
    Date of Last Modification 830316

Comments on the geologic information

  • MOST OF THE NICKEL IN THE ORE IS COMBINED WITH ARSENIC IN THE FORM OF UNIDENTIFIED ARSENIDES.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Monte Cristo District

Mineral rights holdings

Type of mineral rights Private Lease

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Mackinaw Metals Co.
    Home office Washington
    Year 1943
    First year 1945
    Last year 1954
  • Type Operator
    Owner R. D. Taft (Utility Mining Co.)
    Home office Washington
    Year 1943
    First year 1941
    Last year 1947
  • Type Operator
    Owner E. C. Baker, Garrett Cleary, M. T. Commins
    First year 1900
  • Type Operator
    Owner Mackinaw Mining And Milling Co.
    First year 1910

Reserves and resources

  • Type In-situ
    Estimate year 1944
    Inferred 27210mt ore
    Total resources 27210mt ore
    Commodity Subtype Grade units Group Importance Year
    Cobalt Co 0.5 wt-pct Cobalt Trace 1944
    Gold Au 3.8 g/mt Gold Trace 1944
    Nickel Ni 1 wt-pct Nickel Trace 1944
    Silver Ag 10.3 g/mt Silver Trace 1944
    Copper Cu 2.7 wt-pct Copper Major 1944
  • Type In-situ
    Estimate year 1944
    Total resources 36288mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 7.884 g/mt Silver Trace 1944

Comments on the reserve resource information

  • GRADE ESTIMATED FROM METALLURGICAL SAMPLE.

Comments on the workings information

  • SENSITIVITY TO DEVELOPMENT DEPENDS ON THE LOCATION OF THE MILL SITE.

Reference information

Bibliographic references

  • Reserve-Resource

    WAR MINERALS REPORT 156, 1944.

  • Deposit

    WA STATE BULL 37, PART 2, VOL 1, METALLIC MINERALS, P. 87.

  • Deposit

    USBM, WFOC, MINERAL PROPERTY FILE 0530610008.

  • Deposit

    MINE MAP REPOSITORY (MICROFILM).

General comments

Subject category Comment text
Deposit THE DEPOSITS WERE DEVELOPED FROM 1900 TO 1910 IN A SEARCH FOR GOLD ORE. ONLY A FEW TONS OF ORE WAS EVER SHIPPED TO THE SHELTER. THE ORE DEPOSITS ARE IN A PERIDOTITE DIKE OR INTRUSIVE THAT IS INTERSPERSED WITH SMALL BLEBS AND SEAMS OF SERPENTINE, ACTINOLITE AND TREMOLITE. AT SEVERAL PLACES IN THE MASS SMALL DEPOSITS OF NICKEL AND COPPER SULFIDES OCCUR. THE PERIDOTITE IN WHICH THE PRINCIPAL ORE DEPOSITS OCCUR IS A DENSE, DARK COLORED, FINE GRAINED ROCK THAT HAS BEEN PARTLY SERPENTINIZED. THE PRINCIPAL ORE DEPOSITS OCCUR ALONG A SHEAR ZONE THAT STRIKES N32 DEGREES W AND DIPS NEARLY VERTICAL. COBALT ASSAYS ABOUT 0.05 PERCENT

Reporter information

Type Date Name Affiliation Comment
Reporter 24-JUN-94 Ridenour, James U.S. Bureau of Mines

Beyond USGS

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