Ontario Prospect

The Ontario Prospect is a gold, silver, and lead mine located in Snohomish county, Washington at an elevation of 600 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: Ontario Prospect

Commodity

Primary: Gold
Primary: Silver
Primary: Lead

Location

State: Washington
County: Snohomish
District: Silver Creek 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 Snoqualmie National Forest

Holdings

Not available

Workings

Type: Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1900
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: Sandstone
Role: Associated
Age Type: Host Rock Unit
Age Young: Oligocene

Analytical Data

Not available

Materials

Ore: Pyrite
Ore: Galena

Comments

Comment (Location): JUST SOUTH OF COPPER CHIEF PROPERTY

Comment (Commodity): VALUES ARE CHIEFLY IN PB

Comment (Production): 100 TONS OF ORE ON DUMP IN 1901

Comment (Deposit): MINERALIZED SHEAR ZONE

Comment (Geology): GEOLOGIC MAP INDICATES AREA IS UNDERLAIN BY ROCKS OF SWAUK FORMATION. DIORITE MAY BE DIKE ASSOCIATED WITH EITHER INDEX OR GROTTO BATHOLITH

Comment (Workings): SEVERAL SHORT ADITS

References

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, SCALE 1:100,000.

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. 235.

Reference (Deposit): LANDES, HENRY, THYNG, W.S., LYON, D.A., AND ROBERTS, MILNOR, 1902, THE METALLIFEROUS RESOURCES OF WASHINGTON EXCEPT IRON: WASHINGTON GEOLOGICAL SURVEY ANNUAL REPORT FOR 1901, V. 1, P. 113-114.

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.