Monumental Mine

The Monumental Mine is a gold and silver mine located in Grant county, Oregon.

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: Monumental Mine  

State:  Oregon

County:  Grant

Elevation:

Commodity: Gold, Silver

Lat, Long: 44.86222, -118.34806

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 Monumental Mine

Monumental Mine MRDS details

Site Name

Primary: Monumental Mine
Secondary: Kissell


Commodity

Primary: Gold
Primary: Silver
Tertiary: Zinc
Tertiary: Copper
Tertiary: Antimony
Tertiary: Arsenic
Tertiary: Lead


Location

State: Oregon
County: Grant
District: Arsenopyrite, Pyrite; Galena,


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: Wallowa-Whitman National Forest


Holdings

Not available


Workings

Type: Unknown


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Discovery Year: 1870
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Columbia Plateau
Physiographic Section: Blue Mountain Section
Physiographic Detail: Blue Mountains


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Not available


Alterations

Not available


Rocks

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

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


Analytical Data

Analytical Data: 0.27 % ZN
Analytical Data: AND 0.05 % SB.
Analytical Data: 0.68 % AS
Analytical Data: 2.88 OZ/TON AG
Analytical Data: EIGHT DUMP SAMPLES TAKEN BY YOUNG (1979) HAVE AN ARITHMATIC AVERAGE VALUE OF 0.10 OZ/TON AU
Analytical Data: 0.03 % PB
Analytical Data: 0.02 % CU


Materials

Ore: Sphalerite
Ore: Galena
Ore: Pyrargyrite
Ore: Tetrahedrite
Unknown: Calcite
Unknown: Quartz


Comments

Comment (Production): PRODUCTION TOTAL ON AU:AG OF 0.05 AND A TOTAL PRODUCTION OF $100,000 PRIOR TO 1928

Comment (Workings): DEVELOPED BY 2 TUNNELS, 1 SHAFT, AND SEVERAL RAISES TOTALLING 4000 FEET. REACH 700 FT. BELOW OUTCROP. PRODUCTION TOTAL ON AU:AG OF 0.05 AND A TOTAL PRODUCTION OF $100,000 PRIOR TO 1928

Comment (Geology): GEOL.DESC: 12 NARROW PARALLEL VEINS CONSISTING OF LIGHT COLORED GOUGE AND LENSES OF QUARTZ AND SULFIDES. SHATTERING AND ALTERATION OF GRANODIORITE UP TO 5 FT. IN WIDTH, BUT LENSES OF ORE HAVE MAXIMUM WIDTH OF 18 INCHES.


References

Reference (Deposit): YOUNG, J.S., 1979, PARAGENESIS AND GEOCHEMISTRY OF THE GRANITE GOLD DISTRICT, GRANT COUNTY, OREGON; COLORADO STATE UNIV. MS. THESIS

Reference (Deposit): FERNS, M.L. AND OTHERS, 1982, MAP OF THE GEOLOGY AND MINERAL DEPOSITS OF THE MT. IRELAND QUADRANGLE, BAKER AND GRANT COUNTIES, OREGON; ODGMI MAP IN PREPARATION

Reference (Deposit): OREGON METAL MINES HANDBOOK, 1941, ODGMI BULL. 14-B, P.56

Reference (Deposit): BROOKS, H.C. AND RAMP, L., 1968, GOLD AND SILVER IN OREGON; ODGMI BULL. 61, P.80


Oregon Gold

Where to Find Gold in Oregon

"Where to Find Gold in Oregon" 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 Oregon. Read more: Where to Find Gold in Oregon.