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Agnewville Prospect

Occurrence in Prince William county in Virginia, United States with commodities Sulfur-Pyrite, Arsenic, 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. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10067542
MRDS ID W000325
Record type Site
Current site name Agnewville Prospect

Geographic coordinates

Geographic coordinates: -77.28913, 38.64365 (WGS84)
Elevation 52

Site location context

Political divisions (FIPS codes)

Prince William(county)

Virginia(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Occoquan(quadrangle 1:24,000 scale)

Washington West(quadrangle 1:100,000 scale)

Washington(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Potomac-Anacostia-Occoquan(hydrologic unit)

Potomac(hydrologic accounting unit)

Potomac(hydrologic subregion)

Mid Atlantic(hydrologic region)

Geographic areas

Country State County
United States Virginia Prince William

Comments on the location information

  • OFF W SIDE OF STATE ROAD 784, APPROX. 1 MILE N OF ITS INTERSECTION WITH STATE ROAD 642.

Commodities

Commodity Importance
Sulfur-Pyrite Primary
Arsenic Critical Secondary
Gold Secondary

Comments on the commodity information

  • THERE IS NO CONFIRMED GOLD PRESENCE. ACCORDING TO THE LUTTRELL REFERENCE "THE ORE IS SAID TO CONTAIN GOLD".

Materials information

Materials Type of material
Pyrite Ore
Goethite Gangue
Graphite Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock
    Rock unit name Felsic Intrusive Rocks
    Rock description Felsic Intrusive Rocks
    Stratigraphic age (youngest) Late Ordovician
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Quantico Slate;Felsic Intrusive Rocks
    Rock description Quantico Slate;Felsic Intrusive Rocks

Nearby scientific data

(1) -77.28913, 38.64365
ListMap

Economic information

Geologic structures

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

Ore body information

  • Strike N 25 E
    Dip 65 - 85 NW

Comments on the geologic information

  • GEOL.DESC: THE COUNTRY ROCK IS SOMEWHAT SHEARED AND IRON-STAINED BLACK SLATE. DUMPS CONTAIN DISSEMINATED COARSE ARSENO PYRITE AND LIMONITE AFTER PYRITE (?) IN A LIGHT GRAY ROCK THAT MAY BE A FELSIC DIKE. THE ORE IS SAID TO CONTAIN GOLD.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Gold-Pyrite Belt

Comments on the production information

  • THERE IS NO MENTION OF ANY ORE BEING PRODUCED; HOWEVER, THERE ARE 2 PITS, EACH ABOUT 40 FT. DEEP.

Comments on the reserve resource information

  • PYRITIC BODY WAS OF TOO LOW GRADE TO JUSTIFY FURTHER DEVELOPMENT.

Comments on the workings information

  • TWO PITS ABOUT 12 M DEEP WERE EVIDENT AROUND 1958. IN JUNE 1987, THE SHAFT-PITS ON THE HILLSIDE ABOVE THE CREEK WERE FILLED IN WITH BRUSH AND TREE SLASHINGS. CONSTRUCTION OF POTOMAC MILL PLAZA JUST UP THE HILL HAS CONTRIBUTED TO THIS FILLING IN OF THE WORKINGS.

Comments on development

  • LIMITED PROSPECTING WAS CONDUCTED PRIOR TO 1920'S, BUT NO MINING WAS EVER CONDUCTED.

Reference information

Bibliographic references

  • Deposit

    LONSDALE, J.T., 1927, GEOLOGY OF THE GOLD-PYRITE BELT OF THE NORTHEASTERN PIEDMONT, VIRGINIA: VIRGINIA GEOLOGICAL SURVEY BULLETIN 30, 110 P.

  • 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

    DIREXPL DEPOSIT PROSPECTED PRIOR TO 1922

  • Production

    LUTTRELL REFERENCE

  • Reserve-Resource

    LONSDALE REFERENCE

General comments

Subject category Comment text
Deposit AN ABUNDANCE OF PYRITE AND WEATHERED OUT PYRITE WAS SEEN IN LOOSE PIECES OF SLATE ON THE EXPOSURE (1987). LONSDALE (1927) DESCRIBES DEPOSIT AS LENS-LIKE BODY OR POCKET IN GRAPHITIC SLATE, WHILE LUTTRELL (1966) DESCRIBES OCCURRENCE AS BEING IN A FELSIC DIKE.
Deposit THERE IS VERY LITTLE INFORMATION CONCERNING THIS PROSPECT. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1972 Wright, Nancy A. U.S. Geological Survey
Updater 01-DEC-1979 Sweet, Palmer C. (Meintzer, Robert E.) U.S. Geological Survey

Beyond USGS

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

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