Alexander Mine

The Alexander Mine is a gold mine located in Gem county, Idaho at an elevation of 4,800 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: Alexander Mine  

State:  Idaho

County:  Gem

Elevation: 4,800 Feet (1,463 Meters)

Primary Mineral: Gold

Lat, Long: 43.8636, -116.29390

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 Alexander Mine

Alexander Mine MRDS details

Site Name

Primary: Alexander Mine
Secondary: Sampson


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


State: Idaho
County: Gem
District: West View District

Land Status

Land ownership: Private
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.


Type: Patented
Type: Located Claim


Not available


Owner Name: Alexander Lode Inc.


Not available


Record Type: Site
Operation Category: Past Producer
Operation Type: Surface
Discovery Method: Ore-Mineral In Place
Years of Production:
Significant: N
Deposit Size: S


General Physiographic Area: Intermontane Plateaus
Physiographic Province: Columbia Plateau
Physiographic Section: Payette Section
Physiographic Detail: Sawtooth Mountains

Mineral Deposit Model

Not available




Not available


Alteration Type: L
Alteration: Oxidized

Alteration Type: L
Alteration: Pyritized


Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Miocene

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

Analytical Data

Analytical Data: 1.14 OZ AU/, 1.7 OZ AG/TON (ASSAY OF GOUGE)


Ore: Tetrahedrite
Ore: Pyrargyrite
Ore: Lead
Ore: Sphalerite
Ore: Galena
Ore: Chalcopyrite
Ore: Argentite
Gangue: Pyrite


Comment (Location): 1/4 Mi Se Of Crown Point

Comment (Production): Small Amount Of Ore Produced In 1896 Ran $40/Ton Au.

Comment (Development): 1 Patented, 3 Unpatented Claims ( 1935 )

Comment (Geology): Original alteration entry: Local - Pyritized , Oxidized Local -

Comment (Geology): Original ore control entry: Contact Of Diorite Dike And Quartz Diorite

Comment (Production): Prod: < $300,000


Reference (Deposit): Anderson, Alfred L., 1934, Geology Of The Pearl - Horseshoe Bend Gold Belt, Idaho: Idaho Bureau Of Mines & Geol. Pamph 41, P. 35.

Reference (Deposit): Campbell, A., 1936 , 37th Ann. Rept. Of The Idaho Mine Inspector For 1935 .

Reference (Production): Anderson, A. L., 1934, Idaho Bur. Of Mines & Geol. Pamphlet 41, P. 35

Reference (Deposit): Lindgren, W., 1897 , The Mining Districts Of The Idaho Basin And The Boise Ridge, Idaho: U. S. Geological Survey 18th Ann. Rept., Pt. 3 , P. 716

Idaho Gold

Where to Find Gold in Idaho

"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 at Where to Find Gold in Idaho.