Casper Mountain Mine

Prospect in Natrona county in Wyoming, United States with commodity Chromium
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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Reserves and resources
  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 10254356
MAS/MILS ID 0560250077
Record type Site
Current site name Casper Mountain Mine
Alternate or previous names Casper Mountain Chromite

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -106.32394, 42.73605 (WGS84)
Elevation 2426
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Natrona(county)

Wyoming(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Crimson Dawn(quadrangle 1:24,000 scale)

Casper(quadrangle 1:100,000 scale)

Casper(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle North Platte-Casper(hydrologic unit)

North Platte(hydrologic accounting unit)

North Platte(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Wyoming Natrona

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 032 N 079 W 17 SESESE Wyoming

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Actinolite Unknown
Chlorite Unknown
Chromite Unknown
Talc Unknown
Tremolite Unknown

Nearby scientific data

Ore Body (1) -106.32394, 42.73605

Economic information

Ore body information

  • Strike N60E
    Dip 80N
    Thickness 153M
    Length 991M
    Width 85M
    Area 56HA
    Depth to top 1M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 LENTICULAR
    Shape of Orebody #2 TABULAR
    Shape of Orebody #3 IRREGULAR
    Primary mode of Origin MAGMATIC DIFFER
    Secondary mode of Origin METAMORPHISM
    Primary Ore Control IGNEOUS
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N60E:80N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 1.2
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 56
    Date of Last Modification 820901

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Metallic
Significant Yes
Discovery year 1911
Mining method Open Pit
Milling method Gravity

Mining district

District name Casper Mountain Area

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Fee Ownership

Land status

Ownership category Mixed

Ownership information

  • Type Owner
    Owner Consolidated Mining Co.
    Home office Wyoming
    Year 1975
    First year 1975
  • Type Owner
    Owner Wyoming Baptist Convention
    Home office Wyoming
    Year 1975
    First year 1975
  • Type Owner
    Owner City Of Casper
    Home office Wyoming
    Year 1975
    First year 1975

Comments on the ownership information

  • OWNERS: CONSOLIDATED MINING CO., WYOMING BAPTIST CONVENTION. AND CITY OF CASPER.

Reserves and resources

  • Type In-situ
    Estimate year 1945
    Inferred 522000mt ore
    Total resources 522000mt ore
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 8.6999 wt-pct Chromium Major 1945

Comments on the reserve resource information

  • IT WAS ASSUMED THAT THE RESOURCE IN MATRIX 1 COULD BE ESTABLISHED WITH A 75% PROBABILITY DOWN TO 100 FEET OF MINERALIZATION AND WITH AT LEAST 10% PROBABILITY DOWN TO 500 FEET.

Workings at the site

  • Type of workings Surface
    Area 8HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method BENCH (BERM)
    Swell Factor .67
    Percent Waste Rock 42
    Avg. Overburden Thickness 3.3
    Primary Material Cover SAND, GRAVEL
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 7.6
    Max. Pit Slope (degrees) 50
    Capacity 1451
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 37
    Unit Production Cost 6.2
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 2
    Year of Information 1980

Reference information

Bibliographic references

  • Deposit

    HORTON,F.W.,& ALLSMAN,P.T., INVESTIGATION OF CASPER MOU

  • Deposit

    CHROMITE DEPOSITS, NATRONA COUNTY, WYO.; US BUMINES RI 451

  • Deposit

    CASPER MOUNTAIN DEPOSITS, PROJECT 202, NATRONA COUNTY,

  • Deposit

    US BUMINES WAR MINERAL REPORT, CHROMITE, FEB. 1945. (ORIGI

  • Deposit

    WITH APPENDIX)

  • Deposit

    KINGSTON,G.A.,ET AL., AVAILABILITY OF US CHROMIUM RESOU

  • Deposit

    US BU MINES IC 8465, 1970.

  • Deposit

    MATERIALS SURVEY CHROMIUM; US DEPT. OF COMMERCE, 1962.

  • Deposit

    ChROMIUM MINERAL COMMODITY PROFILES, MCP-1 BUREAU OF MINES. UNITED STATES DEPARTMENT OF THE INTERIOR, MAY 1977.

  • Deposit

    WILLIAMS,F. CHROMITE MILL. NOTES ON PROPOSED BENEFICIATION METHOD AND COSTS. (FORMER MAS EVALUATOR) WESTERN FIELD OPERATION CENTER, 1975.

  • Deposit

    Wilson, W.H., 1966, Mineral Resources of Wyoming: Geological Survey of Wyoming Bulletin 50, p. 25.

General comments

Subject category Comment text
Deposit ANALYSIS OF CHROMITE CONCENTRATES FROM CASPER MTN. FROM R.I. CR2O3 44.74 % FE2O3 18.22 % AL2O3 12.28 % FEO 18.05 % MGO 5.24 % MNO 0.19 % CAO 0.20 % SIO2 0.64 % TIO2 0.24 % RECORD 040 - DOMAIN. THE LAND SURROUNDING THE DEPOSIT IS OWN BOTH PRIVATELY AND BY THE CITY OF CASPER.

Reporter information

Type Date Name Affiliation Comment
Reporter 22-FEB-95 Amaro, R. U.S. Bureau of Mines

Beyond USGS

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

External references