Gold Chance Mine

The Gold Chance Mine is a gold and silver mine located in Custer county, Idaho at an elevation of 7,001 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

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.

Site Name

Primary: Gold Chance Mine

Commodity

Primary: Gold
Primary: Silver
Tertiary: Fluorine-Fluorite
Tertiary: Uranium

Location

State: Idaho
County: Custer
District: Stanley 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

Type: Located Claim

Workings

Type: Surface/Underground

Ownership

Owner Name: Humble Oil Co.
Percent: 100.0
Home Office: Texas
Info Year: 1976

Owner Name: John Benzer

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Discovery Year: 1893
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

Structure

Type: R
Description: Idaho Batholith

Type: L
Description: Brecciation, Gouge

Alterations

Alteration Type: L
Alteration Text: Silicification, 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

Analytical Data

Analytical Data: MAXIMUM ASSAYED VALUES OF $ 20 / TON AU AND AG. AN AMOLOUS RADIOACTIVITY UP TO 0.30 MILLIROENTGENS. 1 SAMPLE FROM PORPHYRY DIKE ASSAYED 0.01 % U3O8 AND 0.08 OZ AU/TON. RADIOACTIVITY WAS 10 TIMES BACKGROUND. A SELECT SAMPLE FROM STOCKPILE CONTAINED 0.01 OZ AU/TON AND 1.1 OZ AG/TON. OTHER SELECT SAMPLES ASSAYED 45.0 % CAF2, TRACE-0.10 OZ AU/TON, 0.1 - 0.5 OZ AG/TON

Materials

Ore: Fluorite
Gangue: Quartz
Gangue: Pyrite
Gangue: Calcite
Gangue: Chlorite
Gangue: Kaolinite
Gangue: Chalcedony

Comments

Comment (Location): Located Between Big Basin Creek and A Ridge Crest To the East. East Side of Big Casino Creek Land Status Value Calculated 7-94 Using Gis Overlay Analysis With Usfs Land Ownership Boundaries, 1:126,720 Scale.

Comment (Production): Original Owner Mined Approximately $6,000 In Gold.

Comment (Deposit): Veins Maybe Part of Northeast Extension of Giant Spar Fluorite Zone

Comment (Workings): The Workings Consist of 1 Open Adit, 3 Caved Adits, 2 Caved Shafts, 6 Prospect Pits

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): Vannoy & Others, 1986, USGS Bulletin 1545e, P. 441, Pl. 3, No. 42

Reference (Production): Choate, Raoul, 1962, Idaho Bur. Of Mines And Geology Pamphlet 126, P. 86

Reference (Deposit): Shawe & Others 1976 USGS Professional Paper 933, P. 36-37

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.