Broken Ridge Prospect

The Broken Ridge Prospect is a silver and copper mine located in Snohomish county, Washington at an elevation of 2,251 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: Broken Ridge Prospect

Commodity

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

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

Not available

Ownership

Owner Name: Rosaia Mining Co.
Home Office: Seattle, Wa.
Years: 1956 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
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

Alteration Type: L
Alteration Text: Silicification

Rocks

Not available

Analytical Data

Analytical Data: 3.1% CU, 3 OZ/TON AG, SOME AU

Materials

Ore: Sphalerite
Ore: Bornite
Ore: Pyrite
Ore: Chalcopyrite
Gangue: Quartz

Comments

Comment (Commodity): MODERATE RADIOACTIVITY WAS DETECTED IN ONE PLACE ON THE DEWEY CALIM

Comment (Deposit): SILICIFIED AND MINERALIZED SHEAR ZONE

Comment (Workings): 2 ADITS (ONE IS SEVERAL HUNDRED FEET LONG), SEVERAL OPEN CUTS

Comment (Geology): GEOLOGIC MAP OF AREA SHOWS SWAUK FORMATION. NEAREST METAMORPHIC ROCKS ARE OF EASTERN MELANGE BELT

References

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. 80.

Reference (Deposit): TABOR, R.W., FRIZZELL, V.A., JR., YEATS, R.S., AND WHETTEN, J.T., 1982, GEOLOGIC MAP OF THE EAGLE ROCK AND GLACIER PEAK ROADLESS AREAS, SNOHOMISH AND KING COUNTIES, WASHINGTON: U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP MF-1380-A, SCALE 1:100,000.

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.