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Rome Tuff Fluorspar Deposit

Prospect in Malheur county in Oregon, United States with commodities Fluorine-Fluorite, Zeolites
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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. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10225713
MRDS ID M025322
MAS/MILS ID 0410450090
Record type Site
Current site name Rome Tuff Fluorspar Deposit
Related records 10036499

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -117.6943, 42.86047 (WGS84)
Elevation 1097
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Malheur(county)

Oregon(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rome(quadrangle 1:24,000 scale)

Jordan Valley(quadrangle 1:100,000 scale)

Jordan Valley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Owyhee(hydrologic unit)

Middle Snake-Boise(hydrologic accounting unit)

Middle Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Geographic areas

Country State County
United States Oregon Malheur

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 031 S 041 E 33 Oregon

Commodities

Commodity Importance
Fluorine-Fluorite Critical Primary
Zeolites Tertiary

Materials information

Materials Type of material
Calcite Unknown
Feldspar Unknown
Fluorite Unknown
Kaolinite Unknown
Montmorillonite Unknown
Quartz Unknown
Zeolite Unknown

Nearby scientific data

Ore Body (1) -117.6943, 42.86047
ListMap

Economic information

Ore body information

  • Thickness 7.2M
    Length 2500M
    Width 1250M
    Depth to top 20M
    Field Value
    MAS Matrix # 1
    MAS Column # 3
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SEDIMENTARY
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin EVAPORATION
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 9.2M
    Depth to top 30M
    Field Value
    MAS Matrix # 2
    MAS Column # 3
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SEDIMENTARY
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin EVAPORATION
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 5
    Avg. Thick. Unconsol. Mat. 2
    Date of Last Modification 830316
  • Thickness 16.4M
    Length 6250M
    Width 2500M
    Depth to top 20M
    Field Value
    MAS Matrix # 3
    MAS Column # 3
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SEDIMENTARY
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin EVAPORATION
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 16.4M
    Length 8750M
    Width 2500M
    Depth to top 20M
    Field Value
    MAS Matrix # 4
    MAS Column # 3
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SEDIMENTARY
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin EVAPORATION
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 16.4M
    Length 6250M
    Width 2500M
    Depth to top 20M
    Field Value
    MAS Matrix # 5
    MAS Column # 3
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SEDIMENTARY
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin EVAPORATION
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 16.4M
    Length 6250M
    Width 2500M
    Depth to top 20M
    Field Value
    MAS Matrix # 9
    MAS Column # 3
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SEDIMENTARY
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin EVAPORATION
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Area 2200HA
    Field Value
    Total Surface Area (HA) 2200
    Date of Last Modification 910418

Comments on the geologic information

  • MALHER COUNTY IS A PLATEAU REGION COMPOSED OF SEVERAL WIDESPREAD EXTRUSIVE BASALTIC, ANDESITIC, AND RHYOLITIC FLOWS WITH ASSOCIATED PYROCLASTIC AND SEDIMENTARY ROCKS. THE STRATA IN THE DEPOSIT AREA IS GENERALLY FLAT LYING AND IS NOT CUT BY ANY MAJOR FAULTS. DRILLING HAS REVEALED THAT FLUORSPAR MINERALIZATION IS CONFINED TO TWO BEDS IN THE PLIOCENE SEDIMENTS, THE MARKER TUFF AND THE B UNIT. THE MARKER TUFF IS 4.3 M TO 9.5 M THICK, 7.2 M THICK ON THE AVERAGE. THE B UNIT IS 7.3 M THICK TO 14 M THICK, 9.2 M ON THE AVERAGE. BEDS DIP SLIGHTLY TOWARD THE CENTER OF THE DEPOSIT. BEDS ARE SEPARATED BY 0 TO 10 M OF BARREN MUDSTONE. THERE IS A WIDE RANGE IN THE LATERAL AND VERTICAL EXTENT OF FLUORSPAR IN THE MINERALIZED BEDS. MINERALIZATION IS CONFINED TO AN ELONGATED BOWL-LIKE DEPRESSION CENTERED IN SEC 30 T31S R41E. FLUORSPAR CONTENT GRADUALLY DECREASES MOVING AWAY FROM THE CENTER. THE MARKER TUFF UNDERLIES MOST OF THE MINERALIZED AREA, BUT IS ABSENT IN SPOTS. THE B UNIT IS MORE CONSISTENT THAN THE MARKER TUFF, IT UNDERLIES ALL OF THE MINERALIZED AREA EXCEPT THE EXTREME SOUTHERN PORTION. MINERALIZATION TRENDS NORTH NORTH-EAST.

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Non-metallic
Deposit size Medium
Significant No
Discovery year 1967

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner
    Owner Lehmann Assoc,
    Home office 1409 Willow St S-300, Minneapolis, Mn
    Year 1982
  • Type Owner
    Owner Anaconda Minerals Co. (Division Of Atlantic Richfield)
    Year 1982
  • Type Owner
    Owner Occidental Mining Co.
    Year 1982
  • Type Owner
    Owner Jack Walker
    Year 1982

Comments on the ownership information

  • AREA UNDERLAIN BY FLUORSPAR MINERALIZATION IS CLAIMED BY 4 GROUPS: LEHMANN ASSOC ANACONDA MINERALS OCCIDENTAL MIN CORP JACK WALKER BUT LEHMANN ASSOC IS ONLY GROUP INTERESTED IN FLUORSPAR MINERALIZATION. OTHERS ARE INTERESTED IN ZEOLITES.

Comments on the production information

  • MILL PRODUCES 682 MT PER DAY OF CON. 122 MT OF CERAMIC GRADE (88 PERCENT CAF2). 560 MT OF MET GRADE (70 CAF2).

Reserves and resources

  • Type In-situ
    Estimate year 1969
    Total resources 10900000mt commodity
    Commodity Subtype Grade units Group Importance Year
    Fluorine-Fluorite CaF2 100 wt-pct Fluorine Major 1969

Comments on the reserve resource information

  • NO TONNAGE AND GRADE DATA IS AVAILABLE ON THE DEPOSIT. FIGURES CALCULATED FROM DRILL HOLE DATA. SEE APPENDIX B-2 OF REPORT FOR A COMPLETE DESCRIPTION OF HOW THE RESOURCE DATA WAS DERIVED. THE RESOURCES ARE DIVIDED INTO 5 MATRICES: 4 FOR ALL OF THE RESOURCE IN THE AREA, AND 1 FOR THE PROPOSED MINE AREA. MATRIX 1 DEALS WITH ROCK UNDERLYING THE MINERALIZED AREA WHERE THE MARKER TUFF IS PRESENT, BUT THE B UNIT WAS NEVER MINERALIZED. MATRIX 2 DEALS WITH ROCK UNDERLYING THE MINERALIZED AREA WHERE THE MARKER TUFF HAS BEEN ERODED AWAY, BUT THE B UNIT IS STILL IN PLACE. MATRIX 3 DEALS WITH ROCK UNDERLYING THE MINERALIZED AREA WHERE BOTH THE MARKER TUFF AND B UNITS ARE STILL IN PLACE 123400000 MT IN MARKER TUFF, 218200000 MT IN B UNIT. MATRIX 4 IS A COMPOSITE OF MATRICES 1, 2, AND 3. MATRIX 5 DEALS WITH ROCK UNDERLYING THE MINERALIZED AREA WHICH BENJAMIN FEELS WOULD PROBABLY BE MINEABLE (AREA NORTH OF US HIGHWAY 95). THIS MATRIX CONTAINS 107000000 MT OF MARKER TUFF ROCK AND 256000000 MT OF B UNIT ROCK. THE DEPOSIT ALSO CONTAINS LARGE AMOUNTS OF ZEOLITES, EQUAL TO OR GREATER THAN THE AMOUNT OF FLUORSPAR RICH ROCK. BUT NO INFORMATION ON TONNAGE, GRADE, OR EVEN THICKNESS OF ZEOLITE RICH BEDS IS AVAILABLE. THUS NO ESTIMATE OF ZEOLITE TONNAGE WAS MADE.

Workings at the site

  • Type of workings Surface
    Area 1600HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .33
    Percent Waste Rock 70.6
    Avg. Overburden Thickness 20
    Primary Material Cover HARDPAN
    Secondary Material Cover SAND, GRAVEL
    Tertiary Material Cover HARD ROCKS
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 6
    Max. Pit Slope (degrees) 45
    Capacity 10000
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 1037
    Unit Production Cost 5.67
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 3
    Year of Information 1982

Reference information

Bibliographic references

  • Reserve-Resource

    SHEPPARD, R A, 1969, AUTHIGENIC FLUORINE IN PLIOCENE

  • Reserve-Resource

    LACUSTRINE ROCKS NEAR ROME, MALHEUR COUNTY, OREGON,

  • Reserve-Resource

    USGS, PROF PAPER 650-D, PAGES D69-D74.

  • Deposit

    OR. DEPT. GEOL. AND MIN. INDUST. BULLETIN 64, 1969, P. 270.

  • Deposit

    U.S. GEOLOGICAL SURVEY PROF. PAPER 650-D, 1969, P. 69-74.

General comments

Subject category Comment text
Deposit DEPOSIT COVERS A LARGE AREA. FLUORSPAR MINERALIZATION IS PRESENT IN THE FOLLOWING SECTIONS: T31S R41E SECTIONS 16,17,18,19,20,21,28,29,30,31,32,33. T32S R41E SECTIONS 5,6,7,8,17.

Reporter information

Type Date Name Affiliation Comment
Reporter 31-AUG-1992 Western Field Operations Center (WFOC) 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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