Sweden Mine

The Sweden Mine is a copper mine located in Skamania county, Washington at an elevation of 3,340 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

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.

Site Name

Primary: Sweden Mine
Secondary: Coe Mine
Secondary: St. Helens Mine
Secondary: Norway-Sweden Group

Commodity

Primary: Copper
Secondary: Gold
Secondary: Silver
Tertiary: Zinc

Location

State: Washington
County: Skamania
District: St. Helens District - Spirit Lake Area

Land Status

Land ownership: National Monument
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 St. Helens National Volcanic Monument In Gifford Pinchot National Forest

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: Mount St. Helens Consolidated Mining Co.
Years: 1905 - 1943

Owner Name: New Cinch Uranium, Ltd., Toronto
Years: 1976 -

Production

Year: 1905
Material type: ORE CU
Description: Ap_Grade: ^Average 6.6% Cu, $286

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1905
Year Last Production: 1928
Discovery Year: 1896
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Northern Cascade Mountains

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Form: VEIN

Structure

Not available

Alterations

Not available

Rocks

Name: Hornblendite
Role: Host
Age Type: Host Rock Unit
Age Young: Miocene

Name: Hornblendite
Role: Host
Age Type: Host Rock
Age Young: Miocene

Analytical Data

Analytical Data: WEIGHTED AVERAGE OF 4 SAMPLES: 2.8% CU ACROSS A 3.2 FT THICKNESS. WEIGHTED AVERAGE OF 5 SAMPLES AT DIFFERENT LOCALITY 3.21% CU ACROSS A 4.2 FT THICKNESS. NUMEROUS ASSAYS RAN 0.02-14.2% CU, TR-0.61 OZ/TON AU, NIL-3.80 OZ/TON AG. 12 USBM SAMPLES SHOWED 0.02-8.9% CU, TR AU, NIL-0.64 OZ/TON AG.

Materials

Ore: Sphalerite
Ore: Pyrite
Ore: Pyrrhotite
Ore: Chalcopyrite
Gangue: Quartz
Gangue: Talc

Comments

Comment (Production): 2 CARLOADS OF ORE SHIPPED IN 1928. MOEN CITED 76 TONS OF PRODUCTION FOR BOTH 1927 AND 1929; HOWEVER, FROM THE WAY THE TEXT READS, IT APPEARS AS IF THIS REFERS TO THE SAME PRODUCTION AND POSSIBLY THE YEAR WAS MISTYPED IN THE TEXT

Comment (Workings): 2291 FT ADIT WITH 142 FT, 127 FT, AND 6 FT CROSSCUTS. THIS IS THE LONGEST ADIT IN SOUTHWESTERN WASHINGTON

Comment (Deposit): MINE IS IN THE AREA THAT WAS DEVASTATED DURING THE 1980 ERUPTION OF MOUNT ST. HELENS ; INFO.SRC : 1 PUB LIT

Comment (Location): BELOW LEVEL OF SPIRIT LAKE SUBSEQUENT TO 1980 ERUPTION OF MOUNT ST. HELENS. PROPERTY CONTAINS 8 CLAIMS

Comment (Deposit): DIMENSIONS ARE THOSE GIVEN BY LANDES AND OTHERS. FRACTURE ZONE IN GRANODIORITE, SEVERAL INCHES TO 6 FT THICK, CONSISTS OF GOUGE, TALC, GRANODIORITE FRAGMENTS, AND QUARTZ. IN INDIVIDUAL SHOOTS, PYRITE AND CHALCOPYRITE ARE THE PREDOMINANT ORE MINERALS, DISSEMINATED IN THE VEIN. VEIN CONTAINS 7 MAIN ORE SHOOTS

Comment (Commodity): METAL VALUES ARE HIGHLY VARIABLE ALONG STRIKE OF VEIN

Comment (Reserve-Resource): MOEN GIVES FURTHER DETAILS ABOUT RESERVE CALCULATIONS

Comment (Development): ONE OF A GROUP OF 29 CLAIMS PATENTED BY DR. H. W. COE IN 1905. BETWEEN 1900 AND 1910, MOUNT ST. HELENS CONSOLIDATED MINING CO. SPENT ABOUT $700,000 IN AN ATTEMPT TO MAKE THE SWEDEN A COPPER PRODUCING MINE.

References

Reference (Deposit): LANDES, HENRY, THYNG, W.S., LYON, D.A., ROBERTS, MILNOR, 1902, THE METALLIFEROUS RESOURCES OF WASHINGTON, EXCEPT IRON: WASHINGTON GEOLOGICAL SURVEY ANNUAL REPORT FOR 1901, V. I, PT. 2, P. 132-133.

Reference (Deposit): MOEN, W.S., 1977, ST. HELENS AND WASHOUGAL MINING DISTRICTS OF THE SOUTHERN CASCADES OF WASHINGTON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES INFORMATION CIRCULAR 60, P. 17, 33-37.

Reference (Deposit): DERKEY, R.E., JOSEPH, N.L., AND LASMANIS, RAYMOND, 1990, METAL MINES OF WASHINGTON - PRELIMINARY REPORT: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, P. 340.

Reference (Production): MOEN, (1977), HUNTING, (1956)

Reference (Deposit): HUNTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 78.

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.