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Crawford Mountains Group

Past Producer in Rich county in Utah, United States with commodities Phosphorus-Phosphates, Uranium
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Mineral rights holdings
  16. Land status
  17. Ownership information
  18. Reserves and resources
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10227218
MRDS ID D006301
MAS/MILS ID 490330008
Record type Deposit
Current site name Crawford Mountains Group
Alternate or previous names Crawford Mountains, Crawford Group

Comments on the site names

  • Other Names: Arickaree Mine, Cherokee, Pawnee, Mandan, Emma, Tuscarora, Rex Peak, Bradley, Sioux, Pearl, Crawford Group.

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -111.063, 41.718 (WGS84)
Elevation 1920
Location accuracy 100(meters)
Relative position Approximately at center of deposit which is elongate in NE-SW direction.

Site location context

Political divisions (FIPS codes)

Rich(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rex Peak(quadrangle 1:24,000 scale)

Logan(quadrangle 1:100,000 scale)

Ogden(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Bear(hydrologic unit)

Upper Bear(hydrologic accounting unit)

Bear(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Utah Rich

Public Land Survey System information

Meridian Township Range Section Fraction State
Salt Lake 010 N 007 E 3 Utah

Commodities

Commodity Importance
Phosphorus-Phosphates Primary
Uranium Tertiary

Materials information

Materials Type of material
Apatite Unknown
Calcite Unknown
Dolomite Unknown
Feldspar Unknown
Fluorite Unknown
Gypsum Unknown
Illite Unknown
Kaolinite Unknown
Limonite Unknown
Montmorillonite Unknown
Pyrite Unknown
Quartz Unknown
Sphene Unknown
Tourmaline Unknown
Zircon Unknown

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Phosphorite
    Rock unit name Park City Formation
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (oldest) Late Permian

Nearby scientific data

Ore Body (1) -111.063, 41.718
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure name Woodruff Thrust
Type of structure Regional
Structure name Crawford Thrust

Ore body information

  • Thickness 60M
    Length 50000M
    Width 50M
    Depth to top 50M
    Field Value
    MAS Matrix # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 801103
  • Thickness 60M
    Length 50000M
    Width 50M
    Depth to top 50M
    Field Value
    MAS Matrix # 2
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 801103
  • Thickness 60M
    Length 50000M
    Width 600M
    Depth to top 300M
    Field Value
    MAS Matrix # 3
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 20
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 801103
  • Thickness 60M
    Length 50000M
    Width 600M
    Depth to top 300M
    Field Value
    MAS Matrix # 4
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 20
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 801103
  • Thickness 60M
    Length 50000M
    Width 600M
    Depth to top 300M
    Field Value
    MAS Matrix # 5
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 20
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 801103
  • Thickness 60M
    Length 50000M
    Width 6000M
    Depth to top 1000M
    Field Value
    MAS Matrix # 6
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 30
    Avg. Thick. Unconsol. Mat. 100
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 801103
  • Thickness 60M
    Length 50000M
    Width 30000M
    Depth to top 2300M
    Field Value
    MAS Matrix # 7
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 1524
    Avg. Thick. Unconsol. Mat. 300
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 801103
  • Area 2000HA
    Field Value
    Total Surface Area (HA) 2000
    Date of Last Modification 910418

Controls for ore emplacement

  • Crawford Mountain Syncline

Comments on the geologic information

  • The Phosphoria Formation Is Subdivided Into Five Members By Mckelvey (Bibliography Ref. L010), Two Of Which (The Meade Peak And Retort Members) Contain Significant Phosphate Deposits. In Utah And Southwestern Wyoming, The Meade Peak Member, And In Central And Northwestern Wyoming, The Retort Member Contain The Deposits Of Potential Interest. The Park City Formation Of Utah And Central Wyoming And The Shedhorn Sandstone Of Northwestern Wyoming Are Stratigraphic Equivalents Of And Intertongue With The Phosphoria Formation. The Phosphoria Formation And Equivalent Formations Are Underlain By Either The Tensleep Sandstone, Weber Quartzite, Wells Formation, Or Diamond Creek Sandstone And Are Overlain By Either The Woodside Or Dinwoody Formations.

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Non-metallic
Significant Yes
Discovery year 1904
Mining method Open Pit
Year of first production 1907
Plant type Beneficiation (Mill)
Milling method Washing

Mining district

District name Western Phosphate

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Federal Lease

Land status

Ownership category Mixed

Ownership information

  • Type Owner
    Owner U.S. Government
    Interest 50
    Home office Dist Of Columbia
    Year 1980
  • Type Owner
    Owner Stauffer Chemical Co.
    Interest 50
    Home office Connecticut
    Year 1967

Comments on the ownership information

  • Phosphate Lands May Be Leased From The U.S. Government. Currently, There Is One Active Federal Lease Within The Area Included In This Deposit. The Land Controlled By Stauffer Chemical Co. Is Partially Composed Of Patented Claims Under Perpetual Lease And Partially The Federal Lease Mentioned Above. The Percent Ownership Figures Given Are Approximations Based On Outcrop Strike Lengths.

Comments on the production information

  • The Arickaree, Cherokee, Pawnee, Mandan, Emma, and Tuscarora Mines Have Produced Phosphate Rock At Various Times Between 1907 and 1975, But No Production Figures Have Been Released By The Present Owner, Stauffer Chemical Company, Or By The Previous Owner, San Francisco Chemical Company. Production From Other Mines in the area is not known, but is minor.

Reserves and resources

  • Type In-situ
    Estimate year 1967
    Total resources 197000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 18 wt-pct Phosphorus Major 1967
  • Type In-situ
    Estimate year 1967
    Total resources 111000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 24 wt-pct Phosphorus Major 1967
  • Type In-situ
    Estimate year 1967
    Total resources 29700000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 31 wt-pct Phosphorus Major 1967

Workings at the site

  • Type of workings Surface
    Area 300HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .67
    Percent Waste Rock 93.7
    Avg. Overburden Thickness 5
    Primary Material Cover SAND, GRAVEL
    Percentage 100
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 10
    Max. Pit Slope (degrees) 45
    Capacity 4000
    Capacity Units MT ORE/DAY
    Unit Production Cost 10.92
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 3
  • Type of workings Surface
    Area 300HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .67
    Percent Waste Rock 95
    Avg. Overburden Thickness 5
    Primary Material Cover SAND, GRAVEL
    Percentage 100
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 10
    Max. Pit Slope (degrees) 45
    Capacity 4000
    Capacity Units MT ORE/DAY
    Unit Production Cost 12.69
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 3
  • Type of workings Surface
    Area 300HA
    Field Value
    MAS Development Schedule # 2
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .67
    Percent Waste Rock 93.7
    Avg. Overburden Thickness 5
    Primary Material Cover SAND, GRAVEL
    Percentage 100
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 10
    Max. Pit Slope (degrees) 45
    Capacity 4000
    Capacity Units MT ORE/DAY
    Unit Production Cost 15.09
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 3
  • Type of workings Surface
    Area 300HA
    Field Value
    MAS Development Schedule # 2
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .67
    Percent Waste Rock 95
    Avg. Overburden Thickness 5
    Primary Material Cover SAND, GRAVEL
    Percentage 100
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 10
    Max. Pit Slope (degrees) 45
    Capacity 4000
    Capacity Units MT ORE/DAY
    Unit Production Cost 17.31
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 3
  • Type of workings Underground
    Length 7300M
    Overall depth 100M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 3
    Status of Mining Method PROPOSED
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .67
    Percent Waste Rock 0
    Percent Recovery 88
    Hardness of Rock SOFT NONPLASTIC WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 1
    Length of Inclines (m) 0
    Avg. Length of Adits (m) 1000
    Number of Adits 1
    Capacity 1000
    Capacity Units MT ORE/DAY
    Unit Production Cost 8.18
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
  • Type of workings Underground
    Length 7300M
    Overall depth 100M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 4
    Status of Mining Method PROPOSED
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .67
    Percent Waste Rock 0
    Percent Recovery 88
    Hardness of Rock SOFT NONPLASTIC WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 1
    Length of Inclines (m) 0
    Avg. Length of Adits (m) 1000
    Number of Adits 1
    Capacity 1000
    Capacity Units MT ORE/DAY
    Unit Production Cost 8.18
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
  • Type of workings Underground
    Length 7300M
    Overall depth 100M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 5
    Status of Mining Method PROPOSED
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .67
    Percent Waste Rock 0
    Percent Recovery 88
    Hardness of Rock SOFT NONPLASTIC WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 1
    Length of Inclines (m) 0
    Avg. Length of Adits (m) 1000
    Number of Adits 1
    Capacity 1000
    Capacity Units MT ORE/DAY
    Unit Production Cost 8.61
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
  • Type of workings Underground
    Length 7300M
    Overall depth 100M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 3
    Status of Mining Method PROPOSED
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .67
    Percent Waste Rock 0
    Percent Recovery 56
    Hardness of Rock SOFT NONPLASTIC WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER
    Number of Shafts 1
    Length of Inclines (m) 0
    Avg. Length of Adits (m) 1000
    Number of Adits 1
    Capacity 1000
    Capacity Units MT ORE/DAY
    Unit Production Cost 10.18
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
  • Type of workings Underground
    Length 7300M
    Overall depth 100M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 4
    Status of Mining Method PROPOSED
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .67
    Percent Waste Rock 0
    Percent Recovery 56
    Hardness of Rock SOFT NONPLASTIC WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER
    Number of Shafts 1
    Length of Inclines (m) 0
    Avg. Length of Adits (m) 1000
    Number of Adits 1
    Capacity 1000
    Capacity Units MT ORE/DAY
    Unit Production Cost 10.18
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
  • Type of workings Underground
    Length 7300M
    Overall depth 100M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 5
    Status of Mining Method PROPOSED
    Mining Method ROOM AND PILLAR 10-34
    Swell Factor .67
    Percent Waste Rock 0
    Percent Recovery 56
    Hardness of Rock SOFT NONPLASTIC WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER
    Number of Shafts 1
    Length of Inclines (m) 0
    Avg. Length of Adits (m) 1000
    Number of Adits 1
    Capacity 1000
    Capacity Units MT ORE/DAY
    Unit Production Cost 10.61
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2

Comments on other economic factors

  • Mining and beneficiation costs for each proposed operation were obtained by applying one of 34 basic mine models and 5 basic mill models developed for evaluating Utah and Wyoming phosphate deposits. Site-specific cost adjustments were made for land acquisition, infrastructure, unusual haulage distance to mill, the presence of multiple beds requiring mining of waste, and mill feed grade and recovery. All costs are in January 1980 dollars. The schedule of costs is based on the assumption that each proposed operation will be independently developed as soon as technically possible after the official January 1979 base date for the current phosphate study. Thus, land acquisition, exploration, and infrastructure capital costs are assumed to begin in 1979. Mine and mill capital costs include a contingency allowance of 15 percent of all other capital costs except working capital. Mine and mill working capital is estimated at 60 days of operating cost. A Bureau costing manual (bibliography data set ref. I030) was used to estimate surface and underground mine exploration, development, reclamation, plant, and equipment capital costs; underground mine operating costs; capital and operating costs for the calcining-hydration mill (if used) and for the flotation sections of other mills; costs of transporting products from proposed mills to existing final processing plants; and access road construction cost. Surface mine operating costs are size-scaled, using scaling factors from Bennett (bibliography data set ref. I001), and others (U.S. office of audit and investigation) for Idaho phosphate mines in 1976 and 1977. Infrastructure capital costs assigned to each proposed mine consist of only those railroad, transmission line, and access road costs which are needed for development of each mine. Railroad cost is estimated by the Richardson rapid construction cost estimating system (bibliography data set ref. I020). Transmission line cost is estimated from typical industry costs (A.W. Watts, 1980, Water and Power Resources Services, personal communication). Access road costs are estimated by using the capital and operating cost estimating handbook (bibliography data set ref. I030). Land acquisition costs are based on typical competitive bids for leases in southeastern Idaho, adjusted for specific deposit grade and thickness. Lease rentals and royalties are based on current rates for federal leases in the western phosphate field. Capital and operating costs for all mills, excepting the calcination-hydration mill (if used) and flotation sections of other mills, are size-scaled, using scaling factors from Bennett (bibliography data set ref. I001), from costs given for a sizing and calcining mill described by de Voto, et al. (bibliography data set ref. R030), vol. 2, appendix d. Site-specific cost adjustments for mill feed grade and recovery are made, using relative cost factors calculated from average cost and recovery curves for altered and unaltered ores (bibliography data set ref. I010).

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit This Minerals Availability System Evaluation Was Done As Part Of A 1980 Study Of Utah And Wyoming Phosphate Deposits By The Intermountain Field Operations Center, Denver, Colorado. Domain - The Outcrop Area Falls Roughly Equally On Private Land (Patented Claims) And U.S. Bureau Of Land Management Land With One Section In The Rex Peak Area On State Of Utah Land.
General Also part of the Western Phosphate Field.

Reporter information

Type Date Name Affiliation Comment
Reporter 1996-10-10 Buckingham, David A. U.S. Bureau of Mines
Updater 2010-10-29 Causey, J. Douglas U.S. Geological Survey Update location and Model

Beyond USGS

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

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • Stauffer Chemical Co. — dissolved ~1985
    Acquired by Rhône-Poulenc in 1985; agricultural and industrial chemical businesses dispersed through multiple owners over the following two decades.

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

Maps centered on this site