Gemmill Prospect

The Gemmill Prospect is a silver, copper, and gold mine located in Latah county, Idaho at an elevation of 2,598 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: Gemmill Prospect  

State:  Idaho

County:  Latah

Elevation: 2,598 Feet (792 Meters)

Primary Mineral: Silver, Copper, Gold

Lat, Long: 46.7189, -116.69780

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 Gemmill Prospect

Gemmill Prospect MRDS details

Site Name

Primary: Gemmill Prospect
Secondary: Olson


Commodity

Primary: Silver
Primary: Copper
Primary: Gold


Location

State: Idaho
County: Latah
District: Troy 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.


Holdings

Not available


Workings

Type: Surface/Underground


Ownership

Owner Name: B. Nelson, Troy Sillimanite Co., Al And Bob Olson

Owner Name: L. Osvog


Production

Not available


Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Columbia Plateau
Physiographic Section: Walla Walla Plateau
Physiographic Detail: Clearwater Mountains


Mineral Deposit Model

Not available


Orebody

Form: IRREGULAR


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: Sericitization, Kaolinization


Rocks

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

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

Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic


Analytical Data

Analytical Data: ASSAYS OF 8 REPRESENTATIVE SAMPLES VARIED FROM 1.07 TO 3.48% CU, 0.2 TO 1.4 OZ. AG, AND 0.02 TO 0.04 OZ AU.


Materials

Ore: Covellite
Ore: Chalcopyrite
Ore: Chalcocite
Ore: Bornite
Gangue: Pyrite
Gangue: Garnet
Gangue: Diopside
Gangue: Epidote
Gangue: Quartz
Gangue: Pyrrhotite


Comments

Comment (Location): LIES ALONG LITTLE BEAR CR DOWNSTREAM FROM O.K. OLSON MINE. ABOUT 3.5 MI NE OF AMERICAN RIDGE

Comment (Development): CORE DRILLING BY OLSONS

Comment (Workings): SHAFTS AND CUTS FOR .5 MI OR SO ALONG CREEK


References

Reference (Deposit): Varley, Thomas, Wright, C.A., Soper, E.K., and Livingston, D.C., 1919, A preliminary report on the mining districts of Idaho: U.S. BUReau of MINES BULLetin 166, p. [available online at http://digital.library.unt.edu/ark:/67531/metadc12364/m1/1/]
Pages: p. 35.
URL: http://digital.library.unt.edu/ark:/67531/metadc12364/m1/1/

Reference (Deposit): HUBBARD, C. R., 1956, IDAHO BUREAU OF MINES AND GEOLOGY OPEN-FILE REPT., 1 P.

Reference (Deposit): HUBBARD, C. R., 1957, MINERAL RESOURCES OF LATAH COUNTY: IDAHO BUREAU OF MINES AND GEOLOGY COUNTY REPT. 2, 29 P.

Reference (Deposit): EASTMAN, E. A., 1925, A GEOLOGICAL STUDY OF THE COPPER OUTCROPS NEAR TROY, IDAHO: MOSCOW, IDAHO, UNIV. OF IDAHO, B. S. THESIS, 15 P.


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.