Dayrock Mine

The Dayrock Mine is a lead, silver, and zinc mine located in Shoshone county, Idaho at an elevation of 3,130 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: Dayrock Mine
Secondary: Stratten Mine
Secondary: Mc Phillips Group
Secondary: Option Mine
Secondary: Panhandle Mine

Commodity

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

Location

State: Idaho
County: Shoshone
District: Placer Center

Land Status

Land ownership: Private
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.

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: Hecla Mining Co.
Percent: 100.0
Home Office: Coeur d'Alene, Idaho
Years: 1981 -

Owner Name: Day Mines, Inc.
Percent: 100.0
Home Office: Wallace, Idaho
Years: 1947 - 1981

Owner Name: Dayrock Mining Co.
Percent: 100.0
Home Office: Wallace, Idaho
Years: 1928 - 1947

Owner Name: Strattons Mines Inc.
Percent: 100.0
Home Office: Wallace, Idaho
Years: 1923 - 1928

Production

Year: 2005
Time Period: 1924-1974
Mined: 1197510.000 mt
Material type: Ore Treated

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: HYDROTHERMAL VEIN AND REPLACEMENT
Plant Type: Beneficiation (Mill)
Plant Subtype: Flotation
Operation Type: Underground
Mining Method: Filled Stopes - Horiz Cut and Fill W/Tailings
Milling Method: Flotation
Year First Production: 1924
Year Last Production: 1974
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: Y
Deposit Size: L

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Coeur D'Alene Mountains

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Name: Dorn Vein
Form: PINCH AND SWELL

Name: Ohio Vein
Form: PINCH AND SWELL

Name: Dayrock Vein
Form: PINCH AND SWELL

Structure

Type: L
Description: Most orebodies found between the Dobson Pass and Murray Faults

Alterations

Not available

Rocks

Name: Quartzite
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Quartzite
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Analytical Data

Analytical Data: 2 ORE SHOOTS TOTALING 350 FT LONG AVERAGE 6 OZ/TON AG AND 6.8% PB ACROSS 8 FT WIDTH.

Materials

Ore: Galena
Ore: Sphalerite
Ore: Tetrahedrite
Ore: Chalcopyrite
Gangue: Sericite
Gangue: Siderite
Gangue: Quartz
Gangue: Pyrite
Gangue: Calcite
Gangue: Ankerite

Comments

Comment (Location): BORDERED BY SILVER STAR INC. ON THE S AND W

Comment (Development): 44 PATENTED CLAIMS, 22 UNPATENTED CLAIMS, 3 PATENTED MILLSITES

Comment (Production): Production data compiled from Day Mines, Inc. annual reports and other sources.

Comment (Development): The Dayrock vein orebody, the first economic orebody found in mine, was apparently discovered in 1924.

Comment (Deposit): DAYROCK VEIN STRIKES W TO N 70 DEG W, DIPS 65 DEG S TO VERTICAL; OHIO VEIN STRIKES N 55 DEG W, IS 2000 FT LONG; DORA VEIN STRIKES N 65 DEG W, IS 650 FT LONG; LATTER TWO DIP S. DEPTHS GIVEN ABOVE EXPRESSED IN ELEVATION

Comment (Workings): LENGTH IS A 1961 FIGURE

References

Reference (Deposit): CAMPBELL, A. B., COLSON, J. B., AND OTHERS, 1961 , GUIDEBOOK TO THE GEOLOGY OF THE COEUR D'ALENE MINING DISTRICT: IDAHO BUREAU OF MINES BULL. 16

Reference (Deposit): FRYKLUND, V. C., JR., 1964 , ORE DEPOSITS OF THE COEUR D'ALENE DISTRICT, SHOSHONE COUNTY, IDAHO: USGS PROF. PAPER 445 , 103 P.

Reference (Deposit): GRIGGS, A. B., 1952 , GEOLOGY AND NOTES ON ORE DEPOSITS IN CANYON-NINE MILE CREEKS AREA, SHOSHONE COUNTY, IDAHO: USGS OPEN - FILE REPT., 108 P.

Reference (Geology): Hobbs, S. W., And Others, 1965 , Geology Of The Coeur D'Alene District, Shoshone County, Idaho: USGS Prof. Paper 478 , 139 P.

Idaho Gold

"Where to Find Gold in Idaho" 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 Idaho. Read more: Where to Find Gold in Idaho.