Boulder Group

Occurrence in Grant county in Oregon, United States with commodities Gold, Silver, Copper, Zinc, Cobalt, Arsenic, Nickel
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10033126
MRDS ID M015075
Record type Site
Current site name Boulder Group
Alternate or previous names Cobalt Gold Mines Inc., Boulder Ridge Mining Co.
Related records 10201357

Geographic coordinates

Geographic coordinates: -118.62633, 44.55318 (WGS84)

Site location context

Political divisions (FIPS codes)

Grant(county)

Oregon(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Dixie Meadows(quadrangle 1:24,000 scale)

Bates(quadrangle 1:100,000 scale)

Canyon City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper John Day(hydrologic unit)

John Day(hydrologic accounting unit)

Middle Columbia(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Malheur National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Oregon Grant

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 012S 034E 04 SW Oregon

Comments on the location information

  • SW 1/4

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Primary
Zinc Critical Primary
Cobalt Critical Primary
Arsenic Critical Primary
Nickel Critical Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore
Smaltite Ore
Sphalerite Ore
Calcite Gangue
Quartz Gangue

Analytical data

Result ORE ASSAYS 8 % COBALT, 2 % COPPER, $2 GOLD TO THE TON ( 1898

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -118.62633, 44.55318

Economic information

Comments on the geologic information

  • 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.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Mining district

District name Quartzburg

Land status

Ownership category
Area name Malheur Natioal Forest

Comments on the workings information

  • DEVELOPED BY DRIFTS AND CROSSCUTS ON TWO LEVELS TOTALLING 1000 FT.

Reference information

Bibliographic references

  • Deposit

    OREGON METAL MINES HANDBOOK, 1941 , ODGMI BULL. 14 - B, P. 110 .

  • Deposit

    JOHNSON, F.R., 1975, GEOLOGY OF THE QUARTZBURG MINING DISTRICT, GRANT COUNTY, OREGON; OREGON STATE UNIV. MS. THESIS, P.81

  • Deposit

    IN THE US: ENGINEERING & MINING JOURNAL, SEPT. 1959, VOL. 160, NO. 9, P. 172

General comments

Subject category Comment text
Deposit RECORD NUMBER (M015012) HAS BEEN MERGED WITH THIS RECORD AND DELETED FROM THE OREGON FILE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1976 Lee, W. U.S. Geological Survey
Updater 01-JUL-1978 Bradley, Robin (Walker, George W.) U.S. Geological Survey
Updater 01-AUG-1993 Gray, Jerry J. Oregon Department of Geology and Mineral Industries

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references