The Boulder Group is a silver, copper, zinc, cobalt, arsenic, gold, and nickel 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
Elevation:
Commodity: Silver, Copper, Zinc, Cobalt, Arsenic, Gold, Nickel
Lat, Long: 44.55333, -118.62528
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.
Boulder Group MRDS details
Site Name
Primary: Boulder Group
Secondary: Cobalt Gold Mines Inc.
Secondary: Boulder Ridge Mining Co.
Commodity
Primary: Silver
Primary: Copper
Primary: Zinc
Primary: Cobalt
Primary: Arsenic
Primary: Gold
Primary: Nickel
Location
State: Oregon
County: Grant
District: Quartzburg
Land Status
Administrative Organization: Malheur Natioal Forest
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Deposit Type: Vein
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Columbia Plateau
Physiographic Section: Blue Mountain Section
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: ORE ASSAYS 8 % COBALT, 2 % COPPER, $2 GOLD TO THE TON ( 1898
Materials
Ore: Chalcopyrite
Ore: Pyrrhotite
Ore: Sphalerite
Ore: Pyrite
Ore: Smaltite
Gangue: Quartz
Gangue: Calcite
Comments
Comment (Location): SW 1/4
Comment (Workings): DEVELOPED BY DRIFTS AND CROSSCUTS ON TWO LEVELS TOTALLING 1000 FT.
Comment (Geology): GEOL.DESC: COUNTRY ROCK IS CUT BY A FEW DIORITIC DIKES AND BY FAULTS AND FISSURES THAT TREND GENERALLY N 70 E TO S 70 E AND DIP STEEPLY SOUTHWARD. MINERALIZATION CONSISTED OF SILICIFICATION AND IMPREGNATION OF THE WALLS OF FAULT WITH SULFIDES AND ARSENIDES.
Comment (Deposit): RECORD NUMBER (M015012) HAS BEEN MERGED WITH THIS RECORD AND DELETED FROM THE OREGON FILE
References
Reference (Deposit): OREGON METAL MINES HANDBOOK, 1941 , ODGMI BULL. 14 - B, P. 110 .
Reference (Deposit): JOHNSON, F.R., 1975, GEOLOGY OF THE QUARTZBURG MINING DISTRICT, GRANT COUNTY, OREGON; OREGON STATE UNIV. MS. THESIS, P.81
Reference (Deposit): IN THE US: ENGINEERING & MINING JOURNAL, SEPT. 1959, VOL. 160, NO. 9, P. 172
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.
