Bluebird

Occurrence in Sweet Grass county in Montana, United States with commodities Chromium, Platinum, Palladium, Rhodium
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. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10095653
MRDS ID M060093
Record type Site
Current site name Bluebird
Alternate or previous names Blue Bird
Related records 10148516

Geographic coordinates

Geographic coordinates: -109.96218, 45.38853 (WGS84)
Elevation 2499
Location accuracy 100(meters)
Relative position ABOUT 3 MI WEST OF MOUNTAIN VIEW LAKE, Acc Generalized Location On G Chromitite, Acc Generalized Location On G Chromitite

Site location context

Political divisions (FIPS codes)

Sweet Grass(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Meyer Mountain(quadrangle 1:24,000 scale)

Red Lodge(quadrangle 1:100,000 scale)

Billings(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Stillwater(hydrologic unit)

Upper Yellowstone(hydrologic accounting unit)

Upper Yellowstone(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Custer Gallatin 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 Montana Sweet Grass

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 005S 014E 22,23 Montana

Comments on the location information

  • UNSURVEYED. IN CUSTER NATIONAL FOREST.

Commodities

Commodity Importance
Chromium Critical Primary
Platinum Critical Tertiary
Palladium Critical Tertiary
Rhodium Critical Tertiary

Materials information

Materials Type of material
Chromite Ore
Olivine Gangue

Analytical data

Result CR2O3 IN USBM SAMPLES RAN 1.71-39.99%. ANALYSIS OF B CHROMITITE YIELDED 460 PPB PT, 120 PPB PD, 310 PPB RH. CR2O3 CONTENT: AVERAGE 18% CHROMITE

Mineral occurrence model information

Model code 2
USGS model code 2a
Deposit model name Bushveld Cr

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite
    Stratigraphic age (youngest) Early Cretaceous
    Stratigraphic age (youngest) Neoarchean

Nearby scientific data

(1) -109.96218, 45.38853

Economic information

Geologic structures

Type of structure Regional
Structure description The Stillwater Complex Is Exposed Along The Northern Margin Of The Beartooth Uplift, One Of Several Laramide Basement-Cored Ranges That Make Up The Rocky Mountain Foreland Of South-Central Montana (Foose And Others, 1961: Kulik And Schmidt, 1988)
Type of structure Local
Structure description Small Faults Offset Chromitite Zone

Ore body information

  • General form LENSES
    Strike N75E
    Dip 60SE
    Thickness 0.98M
    Length 457.2M
    Depth to top 0M

Controls for ore emplacement

  • Crystal Settling In Large Magma Chamber

Comments on the geologic information

  • AGE OF STILLWATER COMPLEX IS 2,705 +/- 4 MA BASED ON U-PB SYSTEMATICS ON ZIRCON-BADDELEYITE (PREMO AND OTHERS, 1990)

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1939

Mining district

District name In Stillwater Complex

Land status

Ownership category National Forest

Comments on the workings information

  • TRENCHES AND PROSPECT PITS

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-73 Dohrenwend, John C. U.S. Geological Survey
Updater 01-AUG-91 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

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