Spring Hill Mine

The Spring Hill Mine is a gold mine located in Lewis and Clark county, Montana at an elevation of 4,701 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: Spring Hill Mine  

State:  Montana

County:  Lewis and Clark

Elevation: 4,701 Feet (1,433 Meters)

Primary Mineral: Gold

Lat, Long: 46.555, -112.09583

Map: View on Google Maps

Satelite View


Satelite image of the Spring Hill Mine

Spring Hill Mine MRDS details

Site Name

Primary: Spring Hill Mine


Commodity

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


Location

State: Montana
County: Lewis and Clark
District: Helena 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 indicate a claim status and does not necessarily indicate an area is open to prospecting.


Holdings

Not available


Workings

Type: Surface/Underground


Ownership

Owner Name: Montana Mines Corp.


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Contact Metasomatic
Operation Type: Unknown
Discovery Year: 1870
Years of Production:
Organization:
Significant: Y
Deposit Size: S


Physiography

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


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: Sericitation, Silicification, Chloritifaction, Carbonatization, Hydrothermal


Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Mississippian


Analytical Data

Analytical Data: FLOATION CONCENTRATE $100/TON AU.
Analytical Data: $7.35/TON 1929
Analytical Data: $2.50-16.00/TON AU (1900)


Materials

Ore: Galena
Ore: Gold
Ore: Pyrrhotite
Ore: Chalcopyrite
Gangue: Pyroxene
Gangue: Quartz
Gangue: Chlorite
Gangue: Garnet
Gangue: Pyrite
Gangue: Calcite
Gangue: Ankerite


Comments

Comment (Location): E SIDE OF GRIZZLY GULCH. ; INFO FROM LAND.ST :(1950)

Comment (Development): UNTIL 1929 A CYANIDE PLANT WAS USED, THEN FLOATATIONWAS USED.

Comment (Workings): PROPERTY EXTENDS 1.5 MILES ALONG THE STRIKE OF THE DEPOSIT AND COVERS 350 ACRES (PROBABLY NOT ALL OF THIS WORKABLE). MINE WORKINGS INCLUDE A LARGE PIT AND THREE ADIT LEVELS.

Comment (Geology): ORE BEARING MATERIAL LOCALLY CALLED PYROXINITE. NOTICABLE LACK OF OXIDATION IN CONTRAST TO OTHER LOCAL DEPOSITS. AWAY FROM THE CONTACT THE ORE MINERALS DECREASE RAPIDY AND BECOME BARREN.


References

Reference (Deposit): USGS BULL 527, P. 101.

Reference (Deposit): USGS BULL 842, P. 207-09.

Reference (Deposit): ECCONOMIC GEOLOGY VOL 24, NO 6, P. 544

Reference (Production): USGS BULL 842, P. 207