Big Hole Syncline

The Big Hole Syncline is a phosphorus-phosphates mine located in Silver Bow county, Montana at an elevation of 5,600 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: Big Hole Syncline  

State:  Montana

County:  Silver Bow

Elevation: 5,600 Feet (1,707 Meters)

Commodity: Phosphorus-Phosphates

Lat, Long: 45.6867, -112.72580

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 Big Hole Syncline

Big Hole Syncline MRDS details

Site Name

Primary: Big Hole Syncline


Commodity

Primary: Phosphorus-Phosphates
Tertiary: Vanadium
Tertiary: Uranium
Tertiary: REE
Tertiary: Nickel
Tertiary: Fluorine-Fluorite
Tertiary: Chromium


Location

State: Montana
County: Silver Bow


Land Status

Land ownership: BLM Administrative Area
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

Type: Federal Lease


Workings

Not available


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Mining Method: Unknown
Years of Production:
Organization:
Significant: N


Physiography

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


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Not available


Alterations

Not available


Rocks

Not available


Analytical Data

Not available


Materials

Not available


Comments

Comment (Deposit): THIS RECORD IS FOR A LARGE AREA COVERING THE PHOSPHATE }MINERALIZATION OF THE BIG HOLE SYNCLINE. THUS IT INCLUDES SECS. 4,5,6,8,9,10,14,23,26,36 IN T2S R9W; SECS 30,31,32 T1S R9W DEPOSITS SEQ NO. 0300930095 AND 0300010061 ARE LOCATED HERE DEPOSIT SEQ NO. 0300010548 IS LOCATED HERE. THE SYNCLINE STRIKES N 30-35 W AND IS ASYMMETRIC. OVERTURNED SW LIMB DIPS ARE AS LOW AS 35 DEG, IN NE LIMB DIPS ARE 45 DE APATITE OCCURES AS OOLITIC TO PELLETAL GRAINS THAT ARE VERY FINE TO MEDIUM SAND SIZE, BUT NODULES ARE LOCALLY COMMON

Comment (Reserve-Resource): M1 C3 RETORT MEMBER: Q50; RESOURCE BLOCK ABOVE ENTRY LEVEL, BED AREA 4301270 SQUARE METERS; Q25; RESOURCE BLOCK ABOVE} FIRST 30M BELOW ENTRY LEVEL, BED AREA 4970150 SQUARE METERS; Q10; RESOURCE BLOCK, TOTAL IN AREA, BED AREA 33444000 SQUARE METERS


References

Reference (Reserve-Resource): SOUTHWEST MONTANA, USGS PROFL PAPER 313-E, P. 661-777

Reference (Reserve-Resource): SWANSON, ROGER, 1970, MINERAL RESOURCES IN PERMIAN ROCKS OF


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.