1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Jenkins Farm Prospect

Occurrence in Fairfax county in Virginia, United States with commodity Copper
Map
XML
JSON
KML
B
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Land status
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10067556
MRDS ID W000340
Record type Site
Current site name Jenkins Farm Prospect

Geographic coordinates

Geographic coordinates: -77.32718, 38.98447 (WGS84)
Elevation 104
Relative position 1.3 KM (0.8 MI) N. 60 DEG. W. OF BROWNS CHAPEL

Site location context

Political divisions (FIPS codes)

Fairfax(county)

Virginia(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Vienna(quadrangle 1:24,000 scale)

Washington West(quadrangle 1:100,000 scale)

Washington(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Potomac-Catoctin(hydrologic unit)

Potomac(hydrologic accounting unit)

Potomac(hydrologic subregion)

Mid Atlantic(hydrologic region)

Geographic areas

Country State County
United States Virginia Fairfax

Comments on the location information

  • 0.3 KM (0.2 MI) SW OF VA. HWY. 7 ON SW SIDE OF PINEY RUN, 1.3 KM (0.8 MI) BY ROAD NW OF JUNCTION WITH STATE ROAD 606 (SPRINGVALE ROAD) IN BROWNS CHAPEL. JUST SOUTHEAST OF THE INTERSECTION OF VA HWY. 7 AND TOWN ROAD 6208 (BISHOPSGATE WAY).

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Malachite Ore
Chrysotile Gangue
Limonite Gangue
Magnetite Gangue
Pyrite Gangue
Serpentine Gangue

Alteration

  • (Local) Serpentinite Grades Into Strongly Foliated Soapstone To The East And West.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Rock unit name Ultramafic Rocks;Schist
    Rock description Ultramafic Rocks;Schist

Nearby scientific data

(1) -77.32718, 38.98447
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Reg.Trends: Northeast-Southwest

Ore body information

  • Strike N-S
    Dip 70 DEG. E.**
    Width 30M
    Depth to top 0M
    Depth to bottom 9M

Comments on the geologic information

  • JOINTING IS PROMINENT AND STRIKE E-W AND DIP ABOUT 45 DEGREES TO THE SOUTH. ; GEOL.DESC: CANNON FEELS CU IS PROBABLY RELATED TO THE PRE-TRIASSIC SERPENTINE, BUT IT MAY HAVE BEEN INTRODUCED DURING THE TRIASSIC MINERALIZATION OF THE AREA. ; REG.COM: THE ROCKS IN THIS AREA WERE PREVIOUSLY MAPPED AS WISSAHICKON.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1863
Production years 1880

Land status

Ownership category Private

Comments on the production information

  • THERE MAY HAVE BEEN A CARLOAD OF ORE MINED IN 1880 IF THIS IS THE THEODORA MINE. OTHERWISE THERE APPEARS TO HAVE BEEN NO PRODUCTION.

Comments on the workings information

  • IN 1947 THERE WERE A WATER-FILLED SHAFT 4.6 M IN DIAMETER AND A NUMBER OF OLD PITS IN A LINE NORTH OF THE SHAFT. IN DEC, 1987, THE SHAFT WAS A DEPRESSION, 40 FT BY 20 FT AND ABOUT 5 FT DEEP.

Comments on development

  • LUTTRELL (1966) BELIEVES THIS MAY BE SITE REPORTED BY TYSON (1862). ; ECON.COM: THIS IS ONLY A SMALL SHOWING OF COPPER, AND WAS NEVER OF ENOUGH IMPORTANCE TO MINE.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit *AN ESTIMATE BASED ON THE VOLUME AT THE DUMP. **THESE FIGURES APPLY TO THE DIRECTION OF THE SCHISTOSITY OF THE SERPENTINE AND PHYLLITE.
Deposit MINES REFERRED TO AS THEODORA MINE AND HOWARD MINE, WHOSE LOCATIONS ARE UNKNOWN, MAY BE SYNONOMOUS WITH WORKINGS HERE. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV
Deposit Discovery Year: CIVIL WAR

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1972 Wright, Nancy A. U.S. Geological Survey
Updater 01-DEC-1987 Sweet, Palmer 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