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Thomasson's Mine

Past Producer in Louisa county in Virginia, United States with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  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 10079789
MRDS ID W030524
Record type Site
Current site name Thomasson's Mine

Geographic coordinates

Geographic coordinates: -77.92915, 37.96561 (WGS84)
Elevation 137
Relative position 4.2 KM (2.6 MI) SW OF PENDLETON.

Site location context

Political divisions (FIPS codes)

Louisa(county)

Virginia(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pendleton(quadrangle 1:24,000 scale)

Richmond(quadrangle 1:100,000 scale)

Richmond(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Pamunkey(hydrologic unit)

Lower Chesapeake(hydrologic accounting unit)

Lower Chesapeake(hydrologic subregion)

Mid Atlantic(hydrologic region)

Geographic areas

Country State County
United States Virginia Louisa

Comments on the location information

  • ON WEST SIDE OF STATE ROAD 605, 1.0 KM (0.6 MI) BY ROAD SW OF JUNCTION WITH U.S. HWY. 33.

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Gangue

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

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) -77.92915, 37.96561
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Columbia Syncline , Ne-Sw Trend

Ore body information

  • General form IRREGULAR
    Length 800M
    Width 4.6M

Controls for ore emplacement

  • Veins

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1861
Year of first production 1861

Mining district

District name Gold-Pyrite Belt

Land status

Ownership category Private

Comments on the production information

  • NO PRODUCTION FIGURES REPORTED, HOWEVER PRODUCTION WAS PROBABLY SMALL. CREDNER (1869) REPORTED THAT WITH THE HELP OF THREE HANDS THE DAILY YIELD WAS 30 TO 45 DWTS., OR 1.5 TO 2.25 TOZ.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 15M

Comments on the workings information

  • OPEN PITS 61 M (200 FT) LONG AND 6 M (20 FT) DEEP AND A SHAFT 15 M (50 FT) DEEP WERE SEEN IN 1865. IN 1974, A CAVED SHAFT (?) AND PIT, TRENCH AND DUMPS WERE SEEN.

Comments on development

  • DEVELOPED PRIOR TO CIVIL WAR.

Reference information

Bibliographic references

  • Deposit

    LUTTRELL, G. W., 1966, BASE-AND PRECIOUS-METAL AND RELATED ORE DEPOSITS OF VIRGINIA: VIRGINIA DIVISION OF MINERAL RESOURCES, MINERAL RESOURCES REPORT 7, 167 P.

  • Deposit

    SWEET, P. C., 1980, GOLD IN VIRGINIA: VIRGINIA DIVISION OF MINERAL RESOURCES, PUBLICATION 19, 77 P.

  • Deposit

    CREDNER, H., 1868, REPORT OF EXPLORATIONS ON THE GOLD FIELDS OF VIRGINIA AND NORTH CAROLINA: AMER. JOUR. MNG., VOL. VI, P. 407.

  • Deposit

    1974 RECON VA. DIV. MIN. RES.: INSPECTED SITE

General comments

Subject category Comment text
Deposit Discovery Year: PRE-CIVIL WAR
Deposit ON THE FISHER LODE. VEINS CROSS THE PROPERTY FOR ABOUT 0.8 KM (0.5 MI). THE VEIN IS A CONTINUATION OF THAT OF THE WALNUT GROVE MINE, BUT WIDENS OUT TO 4.6 M (15 FT) IN SPOTS. IT CONSISTS OF FRIABLE QUARTZ, WITH MUCH IRON OXIDE, PYRITE AND GOLD. THE ORE FREQUENTLY SHOWED FREE GOLD TO THE NAKED EYE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1979 Meintzer, Robert E. (Le Van, D.C.) U.S. Geological Survey
Updater 01-OCT-1981 Trimble, David, C. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site