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Southwestern Graphite Mine

Past Producer in Burnet county in Texas, United States with commodity Graphite
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Nearby scientific data
  7. Ore body information
  8. Economic information about the deposit and operations
  9. Mining district
  10. Mineral rights holdings
  11. Land status
  12. Ownership information
  13. Production statistics
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10178636
MRDS ID ISM0069
MAS/MILS ID 0480530004
Record type Site
Current site name Southwestern Graphite Mine
Related records 10130539, 60000532

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -98.35613, 30.78551 (WGS84)
Elevation 305
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Burnet(county)

Texas(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Council Creek(quadrangle 1:24,000 scale)

Llano(quadrangle 1:100,000 scale)

Llano(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Buchanan-Lyndon B. Johnson Lakes(hydrologic unit)

Middle Colorado-Llano(hydrologic accounting unit)

Lower Colorado-San Bernard Coastal(hydrologic subregion)

Texas-Gulf(hydrologic region)

Geographic areas

Country State County
United States Texas Burnet

Commodities

Commodity Importance
Graphite Critical Primary

Nearby scientific data

Main Entrance (1) -98.35613, 30.78551
ListMap

Economic information

Ore body information

  • Strike N65E
    Dip 80N
    Thickness 46M
    Length 1000M
    Width 50M
    Area 30.4HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin METAMORPHISM
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 OTHER
    Strike And Dip N65E:80N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 30.4
    Date of Last Modification 830524

Comments on the geologic information

  • THICKNESS OF MINERALIZATION REFLECTS THE DEPTH OF MINERALIZATION TO ABOUT 50 FEET BELOW THE LEVEL OF CLEAR CREEK. THE EXTENT OF MINERALIZATION AT DEPTH IS NOT KNOWN. THE DIMENSIONS GIVEN ENCOMPASS ALL THREE OREBODIES AS WELL AS THE LESS MINERALIZED ROCK BETWEEN THEM.

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Non-metallic
Significant Yes
Discovery year 1913
Mining method Open Pit
Year of first production 1913
Milling method Flotation

Mining district

District name Llano Uplift

Mineral rights holdings

Type of mineral rights Fee Ownership

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Southwestern Graphite Co. Of The Jos. Dixon Crucible Co.
    Interest 100
    Home office New Jersey
    Year 1983

Comments on the ownership information

  • SOUTHWESTERN GRAPHITE CO. IS A DIVISION OF THE JOSEPH DIXON CRUCIBLE CO., INC. OF JERSEY CITY, N.J.

Production statistics

  • Year 1961
    Description Source: Usbm Proprietary Microfilm 1829 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 1829mt
  • Year 1962
    Description Records, 1960-1977. 2061 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 2061mt
  • Year 1963
    Description 2015 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 2015mt
  • Year 1964
    Description 2016 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 2016mt
  • Year 1965
    Description 2536 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 2536mt
  • Year 1966
    Description 2624 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 2624mt
  • Year 1967
    Description 2528 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 2528mt
  • Year 1968
    Description 2400 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 2400mt
  • Year 1969
    Description 2112 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 2112mt
  • Year 1970
    Description 2095 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 2095mt
  • Year 1971
    Description 1581 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 1581mt
  • Year 1972
    Description 1435 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 1835mt
  • Year 1973
    Description 1565 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 1565mt
  • Year 1974
    Description 1681 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 1681mt
  • Year 1975
    Description 1494 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 1494mt
  • Year 1976
    Description 1728 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 1728mt
  • Year 1977
    Description 1630 Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 1630mt
  • Year 1978
    Accuracy Estimate
    Description 1588 Est. Prod - Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 1588mt
  • Year 1979
    Accuracy Estimate
    Description 1323 Est. Prod - Mt Conc
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Graphite Graphite 1323mt

Comments on the production information

  • PA IS LUBRICANT GRADE GRAPHITE, 96%C, -80 TO +200 MESH IN SIZE. PB IS CRUCIBLE GRADE GRAPHITE, 96%C, +60 MESH IN SIZE. BOTH ARE FORMS OF CRYSTALLINE FLAKE GRAPHITE.
  • REC. 1A01 - Y-PCT IS ACTUALLY 53.3%.

Comments on the reserve resource information

  • M1C1=M9C4. DEMONSTRATED RESERVES ARE 474,050 MT. INFERRED RESERVES ARE 1,728,100 MT. GRADES ARE 5.098%C FOR DEMONSTRATED AND 5.239%C FOR INFERRED RESERVES. SOURCE: CALCULATIONS BASED ON RESERVE FIGURES GIVEN IN THE FOLLOWING REFERENCE: U.S. BUREAU OF MINES, AUGUST 1976, PRELIMINARY FEASIBILITY ESTIMATES OF PROPOSED ALABAMA AND CANADIAN CRYSTALLINE GRAPHITE PROJECTS RELATED TO THE U.S. MARKET: UNPUBLISHED REPORT BY THE MINERALS AVAILABILITY SYSTEM, SYSTEM OPERATIONS GROUP AND DOMESTIC EVALUATION GROUPS OF THE FOUR USBM FIELD OPERATIONS CENTERS, P. 11- 16, 23-25. IN ORDER TO HAVE ALL RESERVE TONNAGES AT THE SAME GRADE, THE INFERRED RESERVE HAD TO BE ADJUSTED FROM THE FIGURE GIVEN ABOVE. THE EQUATION USED FOLLOWS: (DEM.RES.)(DEM.GRA.) + (INF.RES.)(INF.GRA.) Q-P50 RES.= (DEM.GRA.) Q-P50 RESERVE = 2,249,946MT (ROUNDED TO 2,250,000MT).
  • THE EVALUATION SHOULD CONSIDER THE EIGHT PROPERTIES EVALUATED IN THE SEPTEMBER 1976 GRAPHITE REPORT - SOUTHWESTERN GRAPHITE, LILLIE TEMPLETON , LOUISE TEMPLETON, LOGAN TEMPLETON, TEXAS GRAPHITE, FITZSIMMONS, ROBINSON STATE PARK, DEBO-GARRET-DORBANT AREA. THIS DEPOSIT IS NOT INCLUDED IN THE GRAPHITE AVAILABILITY STUDY

Workings at the site

  • Type of workings Surface
    Area 4HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .6
    Percent Waste Rock 50
    Avg. Overburden Thickness 0
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 4.9
    Max. Pit Slope (degrees) 60
    Capacity 218
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 12.68
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 1
    Year of Information 1976

Reference information

Bibliographic references

  • Deposit

    U.S. BUREAU OF MINES, AUGUST 1976, PRELIMINARY FEASIBILITY

  • Deposit

    ESTIMATES OF PROPOSED ALABAMA AND CANADIAN CRYSTALLINE

  • Deposit

    GRAPHITE PROJECTS RELATED TO THE U.S. MARKET: U.S. BUR.

  • Deposit

    MINES PROPRIETARY REPORT PREPARED BY MINERALS AVAILABILITY

  • Deposit

    SYSTEM, P. 11-16, 23-25.

  • Deposit

    U.S. BUREAU OF MINES, SEPTEMBER 1976, SUMMARY REPORT OF

  • Deposit

    CURSORY FEASIBILITY ESTIMATES OF HYPOTHETICAL GRAPHITE

  • Deposit

    MINE AND MILL OPERATIONS IN ALABAMA, TEXAS, CANADA, AND

  • Deposit

    ALASKA: U.S. BUREAU OF MINES PROPRIETARY REPORT PREPARED BY

  • Deposit

    MINERALS AVAILABILITY SYSTEM, P. 4-5, 8-10.

  • Deposit

    CLEMENT, G.K., JR., MILLER, R.L., SEIBERT, P.A., AVERY, L.,

  • Deposit

    AND BENNETT, H., 1977, CAPITAL AND OPERATING COST ESTI-

  • Deposit

    MATING SYSTEM HANDBOOK: PREPARED BY STRAAM ENGINEERS FOR

  • Deposit

    U.S. BUREAU OF MINES UNDER CONTRACT NO. J0255026, 374 P.

  • Deposit

    BARNES, V.E., 1940, ADDITIONAL NOTES ON GRAPHITE IN TEXAS:

  • Deposit

    UNIV. OF TEXAS, BUR. ECON. GEOL., MIN. RES. CIRC. NO. 15,

  • Deposit

    9 P.

  • Deposit

    RALSTON, O.C., 1938, FLOTATION AND AGGLOMERATE CONCENTRATION

  • Deposit

    OF NONMETALLIC MINERALS: U.S. BUREAU OF MINES, R.I. 3397,

  • Deposit

    P. 8-9.

  • Deposit

    TYLER, P.M., 1953, REPORT ON NATURAL GRAPHITE: MINERALS

  • Deposit

    AND METALS ADVISORY BOARD REPORT NO. MMAB-44-M-C, 41 P.

  • Deposit

    CAMERON, E.N., AND WEIS, P.L., 1960, STRATEGIC GRAPHITE,

  • Deposit

    A SURVEY: U.S. GEOLOGICAL SURVEY, BULL. 1082-E, IN CONTRI-

  • Deposit

    BUTIONS TO ECONOMIC GEOLOGY 1958, P. 201-317.

  • Deposit

    GRAFFIN, G.D., 1975, GRAPHITE: CHAPTER IN INDUSTRIAL

  • Deposit

    MINERALS AND ROCKS, S.J. LEFOND, ED., P. 691-705.

  • Deposit

    U.S. BUREAU OF MINES, PROPRIETARY, MICROFILM PRODUCTION

  • Deposit

    RECORDS, 1960-1977.

  • Deposit

    COST REFERENCE GUIDE FOR CONSTRUCTION EQUIPMENT: DATAQUEST,

  • Deposit

    1982 ED., VARIOUS PAGES IN SECTIONS 3 AND 20.

  • Deposit

    GREEN GUIDE FOR CONSTRUCTION EQUIPMENT: DATAQUEST, 1981

  • Deposit

    ED., VARIOUS PAGES IN SECTIONS 10 AND 13.

  • Deposit

    U.S. DEPT. OF LABOR, 1982, PRODUCER PRICES AND PRICE INDEX-

  • Deposit

    ES, DATA FOR JANUARY 1982, P. 54.

  • Deposit

    U.S. GEOLOGICAL SURVEY, 1967, COUNCIL CREEK QUADRANGLE:

  • Deposit

    7 1/2-MINUTE TOPOGRAPHIC MAP, SCALE 1:24,000.

  • Deposit

    U.S. GEOLOGICAL SURVEY, 1954, LLANO, TEXAS: 1-DEGREE BY

  • Deposit

    2-DEGREE TOPOGRAPHIC MAP, SCALE 1:250,000.

  • Deposit

    ZELLARS-WILLIAMS, INC., 1983, PROFILE REPORT, NOTRE DAME

  • Deposit

    DU LAUS: PROPRIETARY REPORT PREPARED FOR U.S. BUREAU OF

  • Deposit

    MINES UNDER CONTRACT NO. J0225019, 12 P.

  • Deposit

    NEEDHAM, A.B., 1946, MINING AND MILLING OPERATIONS OF THE

  • Deposit

    SOUTHWESTERN GRAPHITE CO., BURNET COUNTY, TEX.: U.S.

  • Deposit

    BUREAU OF MINES I.C. 7339, 9 P.

General comments

Subject category Comment text
Deposit THE SOUTHWESTERN GRAPHITE MINE CONSISTS OF THREE SEPARATE OREBODIES LYING ALONG A STRATUM OF GRAPHITE SCHIST. FOR PURPOSES OF EVALUATION, THESE OREBODIES ARE TREATED AS A SINGLE RESERVE. THE LIMITED AMOUNT OF MINING EQUIPMENT PROPOSED (WHICH WAS BASED ON THE ACTUAL AMOUNT OF EQUIPMENT CURRENTLY ON SITE) PRECLUDES THE POSSIBILITY OF MINING MORE THAN ONE OREBODY AT A TIME. THE OREBODY GRADES ARE SIMILAR ENOUGH, HOWEVER, SO THAT NO CHANGES IN CONCENTRATE GRADE WOULD BE ANTICIPATED AS A RESULT OF MINING A DIFFERENT OREBODY. INFORMATION ON THE PROPERTY IS SKETCHY. THE PARENT COMPANY (JOSEPH DIXON CRUCIBLE CO., INC.) REFUSED TO RELEASE ANY DATA ON THE PROPERTY FOR REASONS OF COMPANY POLICY. MOST OF THE DATA USED WERE FROM TWO USBM STUDIES OF THE MINE DONE IN 1976.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-OCT-96 Sawyer, Michael B. 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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