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Stillwater Complex Chromite Deposit

Past Producer in Stillwater county in Montana, United States with commodity Chromium
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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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Mineral rights holdings
  11. Land status
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10124787
MAS/MILS ID 0300950031
Record type Site
Current site name Stillwater Complex Chromite Deposit
Alternate or previous names Mouat Mine 0300950003, Benbow Mine 0300950004, Gish Mine 0300970001

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -109.90389, 45.38602 (WGS84)
Elevation 2164
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Stillwater(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 Stillwater

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 005 S 015 E 20 N2SWNE Montana

Commodities

Commodity Importance
Chromium Critical Tertiary

Nearby scientific data

Main Entrance (1) -109.90389, 45.38602
ListMap

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Stillwater

Mineral rights holdings

Type of mineral rights Patented

Land status

Ownership category National Forest

Comments on the reserve resource information

  • THE TOTAL RESOURCE REPRESENTS ALL IDENTIFIED RESOURCE AT THE MT.VIEW MOUAT,NYE BASIN,AND BENBOW. M1C2=M1C1-M1C3-M1C4 M1C2 REPRESENTS THE TOTAL IDENTIFIED RESOURCE AT THE MT.VIEW/MOUAT MINE. M1C3=M1C1-M1C2-M1C4 M1C3 REPRESENTS THE TOTAL IDENTIFIED RESOURCES AT THE BENBOW MINE. M1C4=M1C1-M1C2-M1C3 M1C4 REPRESENTS THE TOTAL IDENTIFIED RESOURCES IN THE NYE BASIN AREA. M2C1 REPRESENTS THE TOTAL IDENTIFIED RESOURCES AT THE GISH MINE. M9C4 REPRESENTS THE TOTAL IDENTIFIED RESOURCES FROM: BENBOW MEASURED- 1803000 22.4% BENBOW INFERRED-19154000 21.9% BENBOW EAST INF- 8059000 21.9% BENBOW TOTAL-29016000 21.9% NYE BASIN INFER- 5451000 22.2% NYE TOTAL 5451000 22.2% MT.VIEW/MOUAT- 5315000 22.6% MEA. MT.VIEW/MOUAT- 10785000 22.7% IND. MT.VIEW/MOUAT- 2352000 22.2% INF. TOTAL MVM 18452000 22.6% TOTAL IDENTIFIED 52919000 @ 22.2% M9C5 REPRESENTS THE TOTAL MEASURED RESOURCE PRESENT AT: BENBOW 1803000 22.4% CR2O3 MT.VIEW/MOUAT 5315000 22.6% CR2O3 TOTAL 7118000 22.5% CR2O3 M9C6 REPRESENTS THE TOTAL RESOURCE AT THE GISH MINE.

Workings at the site

  • Type of workings Underground
    Length 50000M
    Overall depth 485M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method SHRINKAGE METHODS
    Swell Factor .65
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. TIMBER
    Number of Shafts 1
    Avg. Length of Adits (m) 2000
    Number of Adits 1
    1st Condition of Workings PART ACCESSIBLE
    2nd Condition of Workings OPEN
    3rd Condition of Workings CAVED AT PORTAL
    Capacity 875
    Capacity Units MT ORE/DAY
    Unit Production Cost 22.92
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 2
    Year of Information 1980
  • Type of workings Underground
    Length 50000M
    Overall depth 975M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 5
    Status of Mining Method PROPOSED
    Mining Method SHRINKAGE METHODS
    Swell Factor .65
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. TIMBER
    Number of Shafts 1
    Avg. Length of Adits (m) 5000
    Number of Adits 1
    1st Condition of Workings PART ACCESSIBLE
    2nd Condition of Workings OPEN
    3rd Condition of Workings CAVED AT PORTAL
    Capacity 1625
    Capacity Units MT ORE/DAY
    Unit Production Cost 23.64
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 2
    Year of Information 1980
  • Type of workings Underground
    Length 10000M
    Overall depth 488M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method SHRINKAGE METHODS
    Swell Factor .65
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 1
    Avg. Length of Adits (m) 500
    Number of Adits 6
    Capacity 1000
    Capacity Units MT ORE/DAY
    Unit Production Cost 24.67
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 2
    Year of Information 1980
  • Type of workings Underground
    Length 20000M
    Overall depth 975M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 3
    Status of Mining Method PROPOSED
    Mining Method SHRINKAGE METHODS
    Swell Factor .65
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. TIMBER
    Number of Shafts 1
    Avg. Length of Adits (m) 1000
    Number of Adits 6
    1st Condition of Workings PART ACCESSIBLE
    2nd Condition of Workings OPEN
    3rd Condition of Workings CAVED AT PORTAL
    Capacity 500
    Capacity Units MT ORE/DAY
    Unit Production Cost 30.67
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 2
    Year of Information 1980
  • Type of workings Underground
    Length 300M
    Field Value
    MAS Development Schedule # 3
    Mining Record # 4
    Status of Mining Method PROPOSED
    Mining Method SHRINKAGE METHODS
    Swell Factor .65
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Avg. Length of Adits (m) 300
    Number of Adits 1
    1st Condition of Workings OPEN
    2nd Condition of Workings PART ACCESSIBLE
    Capacity 500
    Capacity Units MT ORE/DAY
    Unit Production Cost 30.17
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 2
    Year of Information 1980

Reference information

Bibliographic references

  • Deposit

    PRICE, P. M., 1963, MINING METHODS & COSTS MOUAT MINE,

  • Deposit

    AMERICAN CHROME CO., STILLWATER COUNTY, MONTANA: U.S.

  • Deposit

    BUREAU OF MINES, IC 8204, 58 P.

  • Deposit

    ALLSMAN, P. T., AND NEWMAN, E. W., 1944, EXPLORATION ON THE

  • Deposit

    STILLWATER CHROMITE DEPOSITS, STILLWATER AND SWEETGRASS

  • Deposit

    COUNITES, MONTANA: AMERICAN INSTITUTE OF MINING AND

  • Deposit

    METALLURGICAL ENGINEERS TECHNICAL PUBLICATION NO. 1751,

  • Deposit

    P. 3-12.

  • Deposit

    WESTGATE, L. G., 1921, DEPOSITS OF CHROMITE IN STILLWATER AD

  • Deposit

    SWEETGRASS COUNTIES, MONTANA: U.S. GEOLOGICAL SURVEY

  • Deposit

    BULLETIN 725, P. 67-84.

  • Deposit

    U.S. GEOLOGICAL SURVEY AND U.S. BUREAU OF MINES, 1977,

  • Deposit

    MINERAL RESOURCES OF THE NORTH ABSAROKA STUDY AREA, PARK

  • Deposit

    AND SWEETGRASS COUNTIES, MONTANA: U.S. GEOLOGICAL SURVEY

  • Deposit

    OPEN-FILE REPORT 77,700, 270 P.

  • Deposit

    MCHUGH, E., 1994, MLA REPORT IN PREPARATION.

Reporter information

Type Date Name Affiliation Comment
Reporter 08-JUN-1984 Wetzel, Nicholas U.S. Bureau of Mines

Beyond USGS

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

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