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  3. Mineral Resource Data System (MRDS)

Last Chance

Past Producer in Grant county in Oregon, United States with commodities Nickel, Chromium, Platinum
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10039223
MRDS ID M046809
Record type Site
Current site name Last Chance
Alternate or previous names Province Lode Chrome, Blue Chrome

Geographic coordinates

Geographic coordinates: -118.73438, 44.34096 (WGS84)
Elevation 1737
Location accuracy 1000(meters)
Relative position 13 MI EAST-SOUTHEAST OF JOHN DAY, NORTH SLOPE OF SHEEP ROCK

Site location context

Political divisions (FIPS codes)

Grant(county)

Oregon(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Strawberry Mountain(quadrangle 1:24,000 scale)

John Day(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)

Strawberry Mountain Wilderness(Wilderness)

Wilderness 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 014S 033E 22 Oregon

Comments on the location information

  • IN STRAWBERRY MOUNTAIN WILDERNESS. LOCATION GIVEN IS ON NORTHEAST SLOPE OF SHEEP ROCK. PART OF LIBERTY CHROME

Commodities

Commodity Importance
Nickel Critical Primary
Chromium Critical Primary
Platinum Critical Primary

Comments on the commodity information

  • SEE RECORD M025546 FOR MORE ASSAYS

Materials information

Materials Type of material
Chromite Ore
Serpentine Gangue

Analytical data

Result STOCKPILE SAMPLE ASSAYED 0.02 OZ/TON (700 PPB) PT
Result 33% CR
Result 0.25% NI

Mineral occurrence model information

Model code 15
USGS model code 8a
Deposit model name Podiform chromite (minor)
Mark3 model number none

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite
    Rock unit name Canyon Mountain Complex
    Rock description Canyon Mountain Complex
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Permian

Nearby scientific data

(1) -118.73438, 44.34096
ListMap

Economic information

Ore body information

  • General form LENS

Controls for ore emplacement

  • Magmatic Segregation

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1918
Discoverer C. H. Morgan

Mining district

District name Canyon City District

Land status

Ownership category National Wilderness
Area name Malheur Natioal Forest

Workings at the site

  • Type of workings Surface
    Overall width 6.1M

Comments on the workings information

  • TRENCH ON 10-FT-WIDE CHROMITE-BEARING ZONE

Comments on development

  • RELOCATION OF LIBERTY CHROME AS PROVINCE LODE CHROME GROUP IN 1939; RELOCATED AS LAST CHANCE IN 1956

Reference information

Bibliographic references

  • Deposit

    STOTELMEYER, R.B., 1977, ECONOMIC APPRAISAL OF THE STRAWBERRY MOUNTAIN WILDERNESS AND ADJACENT AREAS, GRANT COUNTY, OREGON, IN MINERAL RESOURCES OF THE STRAWBERRY MOUNTAIN WILDERNESS AND ADJACENT AREAS, GRANT COUNTY, OREGON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 77-420, P. 91-93, 113.

  • Deposit

    THAYER, T.P., 1940, CHROMITE DEPOSITS OF GRANT COUNTY, OREGON: U.S. GEOLOGICAL SURVEY BULLETIN 922-D, P. 108-109.

General comments

Subject category Comment text
Deposit ORE ZONE HAS 6 IN. WIDE BANDS OF DISSEMINATED CHROMITE IN SERPENTINIZED PYROXENITE
Deposit SEE ALSO: MRDS M046808, M025546.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-77 Blair, Will N. U.S. Geological Survey
Updater 01-MAY-89 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site