Edenton Mine

Past Producer in Spotsylvania county in Virginia, United States with commodities Mica, Feldspar, Tantalum, Niobium (Columbium)

Geologic information

Identification information

Deposit ID 10080109
MRDS ID W031187
Record type Site
Current site name Edenton Mine

Geographic coordinates

Geographic coordinates: -77.78303, 38.08338 (WGS84)
Relative position EXACT LOCATION UNKNOWN, ABOUT 13.6 KM 8.5 MI NORTHEAST OF MINERAL. MINE IS WITHIN ONE MINUTE OF THE LONGITUDE-LATITUDE GIVEN.
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Geographic areas

Country State County
United States Virginia Spotsylvania

Comments on the location information

  • 1.6 KM (1.0 MI) NORTHEAST OF NORTH ANNA RIVER AND 0.8 KM (0.5 MI) EAST OF STATE ROAD 208.

Commodities

Commodity Importance
Mica Primary
Feldspar Secondary
Tantalum Secondary
Niobium (Columbium) Secondary

Materials information

Materials Type of material
Cleavelandite Ore
Muscovite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Chopawamsic Formation
    Rock description Chopawamsic Formation
    Stratigraphic age (youngest) Early Cambrian
    Stratigraphic age (youngest) Early Cambrian

Nearby scientific data

(1) -77.78303, 38.08338

Geologic structures

Type Description Terms
Regional Ne-Sw Trend
Local Faults?

Ore body information

  • General form LENS
    Strike N 60 DEG E
    Dip 60 DEG NW

Controls for ore emplacement

  • Pegmatite Dike

Comments on the geologic information

  • COUNTRY ROCK IS A DECOMPOSED QUARTZ-BIOTITE SCHIST.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both metallic and non-metallic
Deposit size Small
Significant No
Discovery year 1900
Discoverer R.M. Lloyd ?
Year of first production 1900

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner R. M. Lloyd
  • Type Owner
    Owner L. W. Edenton

Comments on the production information

  • NO PRODUCTION FIGURES AVAILABLE, BUT DUE TO ITS SHORT OPERATION IT MUST BE SMALL.

Workings at the site

  • Type of workings Unknown
    Overall depth 15M

Comments on the workings information

  • WORKINGS CONSIST OF 3 PITS AND A DRAINAGE TUNNEL. FROM THE FLOOR OF THE NORTHEAST PIT A 15 M (50 FT) SHAFT WAS SUNK AND A 37 M (120 FT) DRAINAGE TUNNEL FROM THE 7.6 M (25 FT) LEVEL TRENDING N 75 DEG W WAS DUG EXTENDING INTO A TRENCH. THE NORTHWEST PIT IS 7.6 M (25 FT) IN DIAMETER. A NORTHEASTWARD-TRENDING TRENCH 7.6 M (25 FT) LONG AND A SHALLOW PIT HAVE BEEN OPENED AT A PLACE ABOUT 320 M (1050 FT) SOUTHWEST OF THE ABOVE WORKINGS.

Comments on development

  • MINE WAS OPENED BY R.M. LLOYD ABOUT 1900. MINE HAS NOT BEEN WORKED SINCE 1900. A SMALL AMOUNT OF MICA WAS PRODUCED.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS W031187

Bibliographic references

  • Deposit

    BROWN, W.R., 1962, MICA AND FELDSPAR DEPOSITS OF VIRGINIA: VIRGINIA DIVISION OF MINERAL RESOURCES, MINERAL RESOURCES REPORT 3, 195 P.

  • Deposit

    GRIFFITTS, JAHNS, AND LEMKE, 1953, MICA DEPOSITS OF THE SOUTHEASTERN PIEDMONT, PART 4, OUTLYING DEPOSITS IN VIRGINIA, U.S. GEOLOGICAL SURVEY PROF. PAPER 248-C, PP. 171-202.

  • Deposit

    DIETRICH, R.V., 1970, MINERALS OF VIRGINIA: VIRGINIA POLYTECHNIC INSTITUTE, RESEARCH DIVISION BULLETIN 47, WILLIAMS PRINTING CO., RICHMOND, VA., 325 P.

  • Deposit

    1900 DIREXPL R.M. LLOYD - OPENED MINE, PRODUCED MIC

General comments

Subject category Comment text
Deposit KAOLINIZED PEGMATITE (QUARTZ-FELDSPAR) IN A BODY 1.8 M (6 FT) THICK IS EXPOSED IN THE PARTLY CAVED SHAFT. A BODY OF PEGMATITE 1.2 TO 1.5 M (4 TO 5 FT) THICK, STRIKING N 75 DEG E AND DIPPING 60 DEG NW, APPROXIMATELY PARALLEL WITH THE FOLIATION OF THE ENCLOSING WALL ROCK, IS EXPOSED IN THE SOUTHWESTERN PIT. A MASSIVE CORE IS INDICATED BY LARGE BLOCKS OF QUARTZ IN THE DUMPS. THE MICA IN THE DUMPS IS OF FAIR TO GOOD QUALITY AND SOME BOOKS WOULD YIELD 3- BY 3- INCH TRIMMED SHEETS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1981 Trimble, David C. (Sweet, Palmer C.) U.S. Geological Survey