Umatilla Prospect

The Umatilla Prospect is a gold mine located in Idaho county, Idaho at an elevation of 5,499 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

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: Umatilla Prospect

Commodity

Primary: Gold

Location

State: Idaho
County: Idaho
District: Orogrande 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: Nez Perce National Forest

Holdings

Not available

Workings

Type: Surface/Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Deposit Type: Vein
Operation Type: Underground
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

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

Mineral Deposit Model

Not available

Orebody

Form: LENS

Structure

Type: L
Description: Faults Strike N 50 Deg W, Dip 75 To 80 Deg Ne; Slickensides

Alterations

Alteration Type: L
Alteration Text: Gouge

Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

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

Not available

Materials

Gangue: Pyrite
Gangue: Quartz

Comments

Comment (Location): Original coordinates for line#1 were: lat/long NAD27 45-42-26N 115-34-36W (45.70722 -115.57667); UTM N5062300 E610800 Z11N; PLSS line# 1: Meridian- Boise, TWNSHP 027N, RNG 007E, Sect 03, Sect_fract .

References

Reference (Deposit): Shenon, P. J., And Reed, J. C., 1934 , Geology And Ore Deposits Of The Elk City, Orogrande, Buffalo Hump, And Tenmile Districts, Idaho County, Idaho: USGS Circ. 9 , 89 P.

Reference (Deposit): Moore, F. C., 1910, Eleventh Annual Report Of The Mining Industry Of Idaho For The Year 1909.

Reference (Deposit): 1910 Compile State Mine Inspector'S Annual Rept.

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.