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Rockland Mine

Producer in Polk county in Florida, United States with commodities Phosphorus-Phosphates, Aluminum, Fluorine-Fluorite, Iron, Magnesite, 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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Reserves and resources
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10080271
MRDS ID W031382
Record type Site
Current site name Rockland Mine

Geographic coordinates

Geographic coordinates: -81.86698, 27.75811 (WGS84)
Elevation 50
Location accuracy 10000(meters)
Relative position 1.2 KM WEST OF FT. MEADE.

Site location context

Political divisions (FIPS codes)

Polk(county)

Florida(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Homeland(quadrangle 1:24,000 scale)

Bartow(quadrangle 1:100,000 scale)

Fort Pierce(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Peace(hydrologic unit)

Peace(hydrologic accounting unit)

Peace-Tampa Bay(hydrologic subregion)

South Atlantic-Gulf(hydrologic region)

Geographic areas

Country State County
United States Florida Polk

Public Land Survey System information

Meridian Township Range Section Fraction State
Tallahassee 031S 024E 25 E2 OF NE4 OF SE4 Florida

Comments on the location information

  • About 5 Km Eastsoutheast of Fort Meade

Commodities

Commodity Importance
Phosphorus-Phosphates Primary
Aluminum Critical Tertiary
Fluorine-Fluorite Critical Tertiary
Iron Tertiary
Magnesite Tertiary
Uranium Tertiary

Materials information

Materials Type of material
Collophane Ore

Alteration

  • (Local) Clay Altered To Lateritic Aluminum Phosphates, Supergene Uranium Enrichment, Montmorillonite Transformed To Kaolinite.

Analytical data

Result MEDIUM TO HIGH GRADE P2O5 ORE.

Mineral occurrence model information

Model code 244
USGS model code 34d
Deposit model name Phosphate, warm current type

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Phosphorite
    Rock unit name Bone Valley;Hawthorn: Underlies Bone Valley Unconformably. Yellow-Tan Dolostone
    Rock description Bone Valley;Hawthorn: Underlies Bone Valley Unconformably. Yellow-Tan Dolostone
    Stratigraphic age (youngest) Miocene

Economic information

Geologic structures

Type of structure Regional
Structure description Sand
Type of structure Regional
Structure description Clay
Type of structure Regional
Structure description Dolomite
Type of structure Regional
Structure description Phosphorite

Ore body information

  • General form BLANKET (COVERS 2000 SQ MI OF THE COASTAL PLAIN)
    Dip SLOPES OF 5 FT/MILE ARE COMMON TO BONE VALLEY FM.

Comments on the geologic information

  • A Land-Pebble Deposit Thickness Varies Due To Hawthorn Karst Topography
  • THE BONE VALLEY FM WAS DEPOSITED ON THE ERODED SURFACE OF THE HAWTHORN FM. BY A TRANSGRESSING SEA THAT REWORKED AND SORTED THE HIGHLY PHOSPHATIC RESIDUAL OF THE HAWTHORN FM. PHOSPHATE RECOVERED IS FROM THE LOWER BONE VALLEY-WHICH IS LESS WEATHERED-AND THE UPPER RESIDUAL PART OF THE HAWTHORN. RIGGS (1967) REDEFINED THE STRATIGRAPHY CREATING HAWTHORN GROUP WHICHINCLUDES ROCKS PREVIOUSLY PLACED IN HAWTHORN AND BONE VALLEY FMS.BONE VALLEY FM. WAS THEN SUBDIVIDED INTO 11 MEMBERS.

Economic information about the deposit and operations

Development status Producer
Commodity type Both
Deposit size Large
Significant No
Discovery year 1920
Year of first production 1968

Mining district

District name Central Florida Phosphate District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Uss Agri-Chemicals
  • Type Owner
    Owner Uss Agri-Chemicals 50%, Freeport Phosphate Rock Co. 50%

Reserves and resources

  • Type In-situ
    Estimate year 1984
    Total resources 140000000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 25 wt-pct Phosphorus Major 1984

Comments on the workings information

  • 1780 Acres Mined By 5/53. 4400 Acres Were Considered Unminable At That Time. 1974 Price Increase and Improved Mining Techniques Made Low Grade Ore Profitable.

Comments on development

  • PHOSPHATE DEPOSITS ARE COMMONLY LOCATED USING GAMMA RAY LOGGING, AIRBORNE RADIOACTIVITY LOGGING AND GEIGER COUNTER

Reference information

Bibliographic references

  • Deposit

    ZELLAR-WILLIAMS, INC. EVALUATION OF THE PHOSPHATE DEPOSITS OF FLORIDA USING THE MINERALS AVAILABILITY SYSTEMS, BUMINES OPEN FILE REPORT 112-78, NTIS: PB 286-648/AS 1978, 199 PP.

  • Deposit

    KRAUSS AND OTHERS, 1984, INTERNATIONAL STRATEGIC MINERALS INVENTORY SUMMARY REPORT-- PHOSPHATE: U.S. GEOLOGICAL SURVEY CIRCULAR 930-C, 41 P.

  • Other Database

    ISMI

  • Production

    KRAUSS AND OTHERS, 1984

  • Deposit

    Central Florida Phosphate Industry Areawide Impact Assessment Program, Existing Land Use, Vol. Iv, Prepared For U.S.E.P.A By Texas Instruments Inc. June 1977.Central Florida Phosphate Industry Areawide Impact Assessment Program, Existing Land Use, Vol. Iv, Prepared For U.S.E.P.A By Texas Instruments Inc. June 1977.

  • Deposit

    The Williams Companies. Form 10-K. 1976.The Williams Companies. Form 10-K. 1976.

  • Deposit

    Zellars-Williams Inc., Evaluation Of The Phosphate DeZellars-Williams Inc., Evaluation Of The Phosphate De

General comments

Subject category Comment text
Deposit A LAND-PEBBLE DEPOSIT THICKNESS VARIES DUE TO HAWTHORN KARST TOPOGRAPHY
Deposit PHOSPHORITE STUDIES WERE MOTIVATED SOLELY BY THE OCCURRENCE OF URANIUM AS A TRACE SUBSTITUENT OF APATITE. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 30-SEP-1977 Sutphin, David M. U.S. Geological Survey SEE ISM0372
Editor 04-NOV-2002 Nicholson, S.W. U.S. Geological Survey reformated date column; calculated latitude and longitude in decimal degrees; added Location Precision, Continent, Country, State, Commodity Code, Ore Minerals Code fields; changed Major Commodity fie

Beyond USGS

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

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