The Bronco Mine is a lead, silver, and gold mine located in Custer county, Idaho at an elevation of 6,499 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
Elevation: 6,499 Feet (1,981 Meters)
Commodity: Lead, Silver, Gold
Lat, Long: 44.2514, -114.95500
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.
Bronco Mine MRDS details
Site Name
Primary: Bronco Mine
Secondary: Apex
Secondary: Golden Nugget
Secondary: Mountain Girl
Commodity
Primary: Lead
Primary: Silver
Primary: Gold
Secondary: Copper
Tertiary: Zinc
Location
State: Idaho
County: Custer
District: Valley Creek 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.
Administrative Organization: Challis National Forest
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: Fred And Earl Shirts
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Discovery Year: 1895
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Salmon River Mountains
Mineral Deposit Model
Not available
Orebody
Form: LINEAR, STRINGERS
Structure
Type: R
Description: Idaho Batholith
Type: L
Description: Fault Zone, Brecciation
Alterations
Alteration Type: L
Alteration Text: Oxidation
Rocks
Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous
Analytical Data
Analytical Data: 5 CHIP SAMPLES TAKEN FROM VEIN EXPOSURES CONTAINED TRACE AU AND AG, 5.5% PB, 0.9% ZN, 0.09% CU. 19 SELECT DUMP SAMPLES CONTAINED FROM 0.01 - 0.35 OZ AU/TON, 0.01 - 2.63 OZ AG/TON, 0.02 - 5.50% PB, 0.003 - 0.06% ZN, TRACE - 0.41% CU.
Analytical Data: 2 CHIP SAMPLES OXIDIZED PART OF VEIN ASSAYED AT 0.42 OZ AU AND 2.46 OZ AG PER TON
Materials
Ore: Malachite
Ore: Chrysocolla
Ore: Chalcopyrite
Gangue: Limonite
Gangue: Quartz
Comments
Comment (Location): THE MINE IS NEAR THE TOP OF THE LOW RIDGE SW OF STANLEY CREEK LAND STATUS VALUE CALCULATED 7-94 USING GIS OVERLAY ANALYSIS WITH USFS LAND OWNERSHIP BOUNDARIES, 1:126,720 SCALE.
References
Reference (Deposit): CHOATE, RAOUL, 1962, GEOLOGY AND ORE DEPOSITS OF THE STANLEY AREA: IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 126, 120 P.
Reference (Deposit): TSCHANZ, C. M., AND OTHERS, 1974, MINERAL RESOURCES OF THE EASTERN PART OF THE SAWTOOTH NATIONAL RECREATION AREA, CUSTER AND BLAINE COUNTIES, IDAHO: USGS OPEN - FILE REPT., 648 P.
Reference (Deposit): 1962 GEOLMAP IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 126
Reference (Deposit): 1974 RECON TSCHANZ, C. M., AND OTHERS, OPEN - FILE REPT.
Reference (Production): TSCHANZ, C. M., AND OTHERS, 1974, USGS O. F. REPT., P. 484
Reference (Deposit): VANNOY & OTHERS, 1986, USGS BULL.1545E, P.387, PL.3, NO.25
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.
