The Mackinaw is a copper and nickel mine located in Snohomish county, Washington at an elevation of 3,301 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 3,301 Feet (1,006 Meters)
Commodity: Copper, Nickel
Lat, Long: 47.98139, -121.44194
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Mackinaw MRDS details
Site Name
Primary: Mackinaw
Secondary: Weden Creek
Commodity
Primary: Copper
Primary: Nickel
Secondary: Cobalt
Tertiary: Gold
Tertiary: Silver
Tertiary: Vanadium
Tertiary: Uranium
Tertiary: Arsenic
Location
State: Washington
County: Snohomish
District: Monte Cristo District
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: In Mount Baker National Forest
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: Mackinaw Metals Co.
Years: 1956 -
Owner Name: Utility Mining Co.
Years: 1944 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1900
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Northern Cascade Mountains
Mineral Deposit Model
Not available
Orebody
Form: LENSES, DISSEMINATED
Form: LENSES, DISSEMINATED
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: HUNTTING PROVIDES NUMEROUS ANALYSES. METALLURGICAL SAMPLES CONTAINED 2.7% CU, 1% NI, 0.05% CO, 8.9% FE, 0.9% AS, 3.9% S, 30.6% SIO2, 0.2% CAO, 0.11 OZ/TON AU, 0.3 OZ/TON AG
Materials
Ore: Niccolite
Ore: Chalcopyrite
Ore: Magnetite
Ore: Chrysocolla
Ore: Sphalerite
Ore: Chalcocite
Ore: Chloanthite
Ore: Erythrite
Ore: Garnierite
Ore: Malachite
Ore: Gold
Ore: Cubanite
Ore: Pentlandite
Gangue: Calcite
Gangue: Quartz
Gangue: Serpentine
Comments
Comment (Location): UNSURVEYED. ON WEST FORK OF WEDEN CREEK
Comment (Reserve-Resource): ABOVE FIGURE IS MAXIMUM INDICATED RESERVES, IMPLYING MAXIMUM OF 80,000 S. OF COBALT. COLE ESTIMATED 10,000 TONS OF INDICATED AND INFERRED ORE.
Comment (Production): A FEW TONS SHIPPED 1900-1910
Comment (Deposit): ORE ZONE (DIMENSIONS ABOVE) PRESENT IN 3,000 X 125 FT FRACTURE. ORE IS IN LENSES AND DISSEMINATED IN SERPENTINE IN A FRACTURE BETWEEN SERPENTINE AND ARKOSE. ORIGIN IS MAGMATIC SEGREGATION WITH LATER HYDROTHERMAL ALTERATION; THE TYPE OF DEPOSIT IS UNKNOWN
Comment (Workings): 5 ADITS
Comment (Deposit): THE OCCURRENCE OF PENTLANDITE WITHOUT ACCOMPANYING PYRRHOTITE IS UNUSUAL, IF NOT UNIQUE, AMONG NICKEL-SULFIDE ORE DEPOSITS. MILTON AND MILTON REPORTED (1958, P. 436) THAT THIS RESULTED FROM EXCEPTIONALLY HIGH NI:FE AND CU:FE RATIOS IN THE MACKINAW ORE-FORMING SOLUTIONS ; INFO.SRC : 1 PUB LIT
Comment (Deposit): MRDS RECORD M025736 HAS BEEN MERGED WITH THIS RECORD AND DELETED
References
Reference (Deposit): MILTON, CHARLES, AND MILTON, D.J., 1958, NICKEL-GOLD ORE OF THE MACKINAW MINE, SNOHOMISH COUNTY, WASHINGTON: ECONOMIC GEOLOGY, V. 53, NO. 4, P. 426-447.
Reference (Deposit): CORNWALL, H.R., 1966, NICKEL DEPOSITS OF NORTH AMERICA: U.S. GEOLOGICAL SURVEY BULLETIN 1223, P. 56-57.
Reference (Deposit): HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 87.
Reference (Deposit): TABOR, R.W., FRIZZELL, V.A., JR., BOOTH, D.B., WHETTEN, J.T., WAITT, R.B., JR., AND ZARTMAN, R.E., 1982, PRELIMINARY GEOLOGIC MAP OF THE SKYKOMISH RIVER 1:100,000 QUADRANGLE, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 82-747, SCALE1:100,000.
Reference (Production): HUNTTING
Reference (Reserve-Resource): UNPUB. COBALT REPORT
Reference (Deposit): COLE, J.W., 1944, MACKINAW METALS MINE, SNOHOMICH COUNTY, WASHINGTON: U.S. BUREAU OF MINES WAR MINERALS REPORT 156, 11 P.
Washington Gold
"Where to Find Gold in Washington" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Washington.
