May Day Mine

The May Day Mine is a lead, gold, silver, and copper mine located in Beaverhead county, Montana at an elevation of 7,051 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

Name: May Day Mine  

State:  Montana

County:  Beaverhead

Elevation: 7,051 Feet (2,149 Meters)

Commodity: Lead, Gold, Silver, Copper

Lat, Long: 45.31944, -112.87417

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.


Satelite image of the May Day Mine

May Day Mine MRDS details

Site Name

Primary: May Day Mine


Commodity

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


Location

State: Montana
County: Beaverhead
District: Argenta 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.


Holdings

Not available


Workings

Not available


Ownership

Owner Name: John Thuleson


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1935
Discovery Year: 1934
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Pioneer Mountains


Mineral Deposit Model

Not available


Orebody

Form: LENSES


Structure

Type: L
Description: Shale Trends N37e, 38 Se.


Alterations

Not available


Rocks

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

Name: Shale
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic


Analytical Data

Not available


Materials

Not available


Comments

Comment (Workings): PROPERTY HAS BEEN TESTED ENTIRE LENGTH BY PITS, SHAFTS AND TRENCHES. ALL SHAFTS WERE INACCESSIBLE IN 1972.

Comment (Location): CENTER OF SOUTH BORDER OF SECTION 7.

Comment (Production): PRODUCTION YEARS WERE 1935-7, 1939-42, 1947-50, AND 1961

Comment (Deposit): SHEAR ZONE IS 6 TO 12 INCHES WIDE AND IS MARKED BY GRAY TO YELLOWISH GOUGE.


References

Reference (Production): M.B.M.G. BULL. 85

Reference (Deposit): MBMG BULL 85, P. 59.

Reference (Deposit): MBMG BULL 25, P. 7.

Reference (Deposit): 1972 COMPILE M.B.M.G. BULL. 8


Principal Gold Districts of Montana

Principal Gold Districts of Montana

In Montana, 54 mining districts have each have produced more than 10,000 ounces of gold. The largest producers are Butte, Helena, Marysville, and Virginia City, each having produced more than one million ounces. Twenty seven other districts are each credited with between 100,000 and one million ounces of gold production. Read more: Principal Gold Districts of Montana.