Gilt Edge Mine

The Gilt Edge Mine is a gold mine located in Fergus county, Montana at an elevation of 5,000 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: Gilt Edge Mine  

State:  Montana

County:  Fergus

Elevation: 5,000 Feet (1,524 Meters)

Primary Mineral: Gold

Lat, Long: 47.14417, -109.22639

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 Gilt Edge Mine

Gilt Edge Mine MRDS details

Site Name

Primary: Gilt Edge Mine
Secondary: Gilt Edge Group
Secondary: Virgin Gulch
Secondary: Turtle Winds Shaft
Secondary: Heath Mill


Commodity

Primary: Gold
Secondary: Silver


Location

State: Montana
County: Fergus
District: Warm Springs - Gilt Edge District


Land Status

Not available


Holdings

Not available


Workings

Type: Surface/Underground


Ownership

Owner Name: Blue Range Mining Co. Ltd Partnership
Percent: 100.0
Home Office: 305 W. Mercury St., Butte MT 59701
Years: 1988 -

Owner Name: Sunshine Mining Co.
Home Office: Kellogg Idaho


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Au-Ag-Te vein
Operation Type: Surface-Underground
Milling Method: Flotation
Year First Production: 1883
Discovery Year: 1883
Discovery Method: Unknown
Years of Production:
Organization:
Significant: Y
Deposit Size: S


Physiography

General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Missouri Plateau, Unglaciated
Physiographic Detail: Judith Mountains


Mineral Deposit Model

Model Name: Alkaline Au-Te (Au-Ag-Te veins)


Orebody

Form: POD/LENS


Structure

Type: R
Description: Large Laccolithic And Stock Intrusives Of Rhyolite And Quartz Monzonite

Type: L
Description: Doming And Faulting Produced By The Alpine Gulch Stock. Numerous Small Rhyolite Dikes.


Alterations

Alteration Type: L
Alteration Text: Oxidation, Kaolinization


Rocks

Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Mississippian

Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene


Analytical Data

Not available


Materials

Gangue: Pyrite


Comments

Comment (Workings): MINE IS DEVELOPED BY A 1650-FOOT MAIN HAULAGE TUNNEL, THE 1700-FOOT STANDBY CROSSCUT, A 185-FOOT WINZE BELOW THE HAULAGE LEVEL, AND NUMEROUS SMALL ADITS, INCLINES AND SHAFTS. SEVERAL THOUSAND FEET OF CROSSCUTS AND RAISES PROSPECT THE ORE ZONE. SEVERAL THOUSAND FEET OF STOPED GROUND, UP TO 90 FEET HIGH AND 300 FEET WIDE, AND SEVERAL OPEN PITS EXTEND ALONG THE STRIKE OF THE ORE BODIES.

Comment (Geology): THE MINERALIZATION HAS OCCURRED BELOW THE RHYOLITE DIKE PRODUCING LARGE BODIES OF LOW GRADE ORE. REPLACEMENT OF LIMESTONE HAS PREDOMINATED, WITH LESSER AMOUNTS OF BRECCIA AND KIBBY SANDSTONE BEING REPLACED.

Comment (Commodity): NO GOLD OR SILVER BEARING MINERALS HAVE BEEN RECOGNIZED, BUT IT HAS BEEN POSTULATED THAT THE GOLD IS IN THE FORM OF A FINELY DISSEMINATED TELLURIDE OR CONTAINED IN AURIFEROUS PYRITE.

Comment (Reserve-Resource): 1. LARGE AMOUNTS OF BLACK OR UNOXIDIZED ORE ARE REPORTEDLY PRESENT AT DEPTH. 2. THIS IS REPORTED AS OXIDIZED ORE LEFT AS PILLARS IN THE OLD STOPES.

Comment (Deposit): THE OXIDIZED ORE IS EASILY TREATED BY CYANIDATION, BUT UNOXIDIZED ORE MUST BE TREATED IN THE ROASTING CIRCUIT TO RECOVER THE GOLD WITH THE CYANIDE PROCESS.

Comment (Deposit): Merged data from Deposit ID 10148604 (Giltedge)


References

Reference (Production): FORREST, 1971; USBM INF. CIRC. 7544

Reference (Deposit): ROBERTSON, A. F., 1950, MINES AND MINERAL DEPOSITS, FERGUS COUNTY, MONT.: U. S. BUREAU OF MINES INF. CIRC. 7544

Reference (Deposit): FORREST, R. A., 1971, GEOLOGY AND MINERAL DEPOSITS OF THE WARM SPRINGS - GILT EDGE DISTRICT, FERGUS COUNTY, MONTANA M. S. THESIS MONTANA TECH, BUTTE MONTANA