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Hobart Butte

Past Producer in Lane county in Oregon, United States with commodities Aluminum, Arsenic, Clay, Iron, Mercury, Silica, Titanium, Water, Free
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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. 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 10201748
MRDS ID M055869
MAS/MILS ID 0410390001
Record type Site
Current site name Hobart Butte
Related records 10098458

Geographic coordinates

Point of reference Pit
Geographic coordinates: -123.10057, 43.61011 (WGS84)
Elevation 707
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Lane(county)

Oregon(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Harness Mountain(quadrangle 1:24,000 scale)

Cottage Grove(quadrangle 1:100,000 scale)

Roseburg(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Coast Fork Willamette(hydrologic unit)

Willamette(hydrologic accounting unit)

Willamette(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management OR)

Bureau of Land Management OR BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Oregon Lane

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 022 S 003 W 31 Oregon

Commodities

Commodity Importance
Aluminum Critical Tertiary
Arsenic Critical Tertiary
Clay Tertiary
Iron Tertiary
Mercury Tertiary
Silica Tertiary
Titanium Critical Tertiary
Water, Free Tertiary

Materials information

Materials Type of material
Kaolinite Unknown
Quartz Unknown

Nearby scientific data

Pit (1) -123.10057, 43.61011
ListMap

Economic information

Ore body information

  • Thickness 24M
    Length 120M
    Width 407M
    Area 142HA
    Depth to top 17M
    Field Value
    Type of Orebody #1 OTHER
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 REPLACEMENT
    Primary mode of Origin METAMORPHISM
    Secondary mode of Origin HYDROTHERMAL
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Minimum Depth to Top 1
    Avg. Thick. Unconsol. Mat. 17
    Min. Thick. Unconsol. Mat. 1
    Total Surface Area (HA) 142
    Date of Last Modification 830316

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Discovery year 1930
Year of first production 1934

Mining district

District name Black Butte District

Mineral rights holdings

Type of mineral rights Private Lease
Type of mineral rights Fee Ownership
Type of mineral rights Minerals Only

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Willamina Clay Products Co.
    Interest 13
    Home office Oregon
    Year 1945
  • Type Owner
    Owner W. A. Woodard Land Co.
    Interest 15
    Home office Oregon
    Year 1945
  • Type Owner
    Owner Weyerhaeuser Timber Co.
    Interest 15
    Home office Oregon
    Year 1945
  • Type Owner-Operator
    Owner Klamath Falls Brick And Tile Co.
    Home office Oregon
    Year 1991

Reserves and resources

  • Type In-situ
    Estimate year 1945
    Measured 31900000mt ore
    Indicated 10925000mt ore
    Demonstrated 42825000mt ore
    Inferred 15660000mt ore
    Total resources 58485000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 25 wt-pct Aluminum Trace 1945
    Iron Fe2O3 6.6 wt-pct Iron Trace 1945

Comments on the reserve resource information

  • MATRIX TONNAGE AND GRADE FIGURES WERE DERIVED IN HOUSE IN 1975 IN CONJUNCTION WITH HUSTEAD OF GEORGIA TECH.

Workings at the site

  • Type of workings Surface
    Area 142HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method BENCH (BERM)
    Swell Factor .7
    Percent Waste Rock 0
    Avg. Overburden Thickness 17
    Primary Material Cover SAND, GRAVEL
    Percentage 100
    Hardness of Ore SAND, GRAVEL
    Avg. Bench Height (meters) 15
    Max. Pit Slope (degrees) 45
    Capacity 6350
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 206
    Unit Production Cost 2.72
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1979

Reference information

Bibliographic references

  • Deposit

    U.S. GEOLOGICAL SURVEY BULLETIN 850, 1934, P. 34.

  • Deposit

    OR. DEPT. GEOL. AND MIN. INDUST. BULLETIN 55, 1963, P. 40.

  • Deposit

    U.S. BUREAU OF MINES IC 8252, 1965, TABLE 26, P. 321.

General comments

Subject category Comment text
Deposit THE MINIMUM DEPTH TO THE MINERALIZED ZONE IS MEASURED F TOP OF THE UPPER CLAY BED. THE ORE TO OVERBURDEN RATIO IS A 1.4 TO 1. MATRIX GRADES AND TONNAGES ARE BASED ON WET TONNES. IN DATA WAS ENTERED BY HUSTEAD OF GEORGIA TECH., AND REVISED BY MCMAHAN IN 1975. THERE ARE THREE SETS OF COSTS; ORIGINAL 1975 COSTS, COSTS UPDATED FROM 1975 TO 1979, AND COMPLETELY RECOSTED 1979 COSTS.

Reporter information

Type Date Name Affiliation Comment
Reporter 16-SEP-96 Lindsey, David S. 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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