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

Greenbriar Prospect

Occurrence in Fairfax county in Virginia, United States with commodities Iron, 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. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10067560
MRDS ID W000344
Record type Site
Current site name Greenbriar Prospect

Geographic coordinates

Geographic coordinates: -77.40413, 38.87003 (WGS84)
Elevation 108
Relative position 4.0 KM (2.5 MI) N. 30 DEG. E. OF CENTREVILLE.

Site location context

Political divisions (FIPS codes)

Fairfax(county)

Virginia(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Manassas(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 Fairfax

Comments on the location information

  • LOCATED IN GREENBRIAR SUBDIVISION IN VICINITY OF STATE ROAD 4822, 0.3 KM (0.2 MI) EAST OF STATE ROAD 645 (STRINGFELLOW ROAD), 1.6 KM (1.0 MI) BY ROAD SOUTH OF U.S. HWY 50.

Commodities

Commodity Importance
Iron Primary
Copper Secondary

Comments on the commodity information

  • HEMATITE OCCURS AS MASSIVE SPECULARITE WITHIN SILICEOUS ZONES, AS SCATTERED ROSETTES, AS DISSEMINATED COMPACT METALLIC AND RED HEMATITE AND AS FINE CRYSTALS. SMALL AMOUNTS OF MALACHITE OCCUR WITH HEMATITE OCCASIONALLY.

Materials information

Materials Type of material
Hematite Ore
Malachite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Rock unit name Diabase
    Rock description Diabase
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Host
    Rock type Metamorphic Rock > Hornfels
    Rock unit name Diabase;Hornfels
    Rock description Diabase;Hornfels

Nearby scientific data

(1) -77.40413, 38.87003
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Ne-Sw Trend, Culpeper Triassic Basin ; Reg.Trends: Northeast-Southwest
Type of structure Local
Structure description Sill Or Flow

Ore body information

  • General form BLANKET
    Depth to top 0M

Controls for ore emplacement

  • Diabase Sill

Comments on the geologic information

  • HORNFELS REPRESENTS METAMORPHOSED PORTION OF MANASSAS SANDSTONE, NEWARK GROUP. ; MAJOR.UNITS: SANDSTONE AND DIABASE ; GEOL.DESC: HEMATITE NEAREST THE DIABASE OCCURS AS MASSIVE COARSELY CRYSTALLINE SPECULARITE WITHIN SILICEOUS ZONES AS MUCH AS 2 FT. THICK. IT ALSO OCCURS AS ROSETTES IN SCATTERED SEGREGATIONS.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1968
Discoverer P. Hanshaw

Mining district

District name Culpeper Basin

Land status

Ownership category Private

Comments on the reserve resource information

  • PROBABLY ONLY SMALL AMOUNT OF LOW GRADE CU ORE

Comments on development

  • THE ONLY INFORMATION ABOUT THE ORE IS BASED ON EXPOSURES IN SEVERAL 3.7 M DEEP TRENCHES. ; ECON.COM: THIS OCCURRENCE IS NOW OVERLAIN BY HOUSES OF THE GREENBRIAR SUBDIVISION, AND WILL MOST PROBABLY NEVER BE INVESTIGATED ANY FURTHER.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit IN ALTERED ZONE NEAREST DIABASE; MASSIVE, COARSELY CRYSTALLINE SPECULARITE OCCURS WITHIN SILICEOUS ZONES AS MUCH AS 0.6 M THICK AND AS SCATTERED ROSETTES. FARTHER AWAY HEMATITE CRYSTALS OCCUR WITH QUARTZ IN SOLID ROUNDED CLOTS.
Deposit NO NAME PREVIOUSLY APPLIED TO 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-JAN-1980 Meintzer, Robert E. (Le Van, D.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