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
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.
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" 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.
